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#
# GETBULK Command Generator
#
# Send a series of SNMP GETBULK requests
# with SNMPv2c, community 'public'
# using Asyncio framework for network transport
# over IPv4/UDP
# to an Agent at 195.218.195.228:161
# with values non-repeaters = 0, max-repetitions = 25
# for two OIDs in tuple form
# stop on end-of-mib condition for both OIDs
#
# This script performs similar to the following Net-SNMP command:
#
# $ snmpbulkwalk -v2c -c public -C n0 -C r25 -ObentU 195.218.195.228 1.3.6.1.2.1.1 1.3.6.1.4.1.1
#
from pysnmp.entity import engine, config
from pysnmp.proto import rfc1905
from pysnmp.entity.rfc3413.asyncio import cmdgen
from pysnmp.carrier.asyncio.dgram import udp
import asyncio
# Get the event loop for this thread
loop = asyncio.get_event_loop()
# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()
#
# SNMPv2c setup
#
# SecurityName <-> CommunityName mapping
config.addV1System(snmpEngine, 'my-area', 'public')
# Specify security settings per SecurityName (SNMPv1 - 0, SNMPv2c - 1)
config.addTargetParams(snmpEngine, 'my-creds', 'my-area', 'noAuthNoPriv', 1)
#
# Setup transport endpoint and bind it with security settings yielding
# a target name
#
# UDP/IPv4
config.addTransport(
snmpEngine,
udp.domainName,
udp.UdpTransport().openClientMode()
)
config.addTargetAddr(
snmpEngine, 'my-router',
udp.domainName, ('195.218.195.228', 161),
'my-creds'
)
# Error/response receiver
def cbFun(cbCtx):
(snmpEngine, errorIndication,
errorStatus, errorIndex, varBindTable, status) = cbCtx.result()
if errorIndication:
print(errorIndication)
elif errorStatus:
print('%s at %s' % (
errorStatus.prettyPrint(),
errorIndex and varBindTable[-1][int(errorIndex)-1][0] or '?'
)
)
else:
for varBindRow in varBindTable:
for oid, val in varBindRow:
print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))
# Stop mainloop when we are done walking (optional)
for oid, val in varBindRow:
if not val.isSameTypeWith(rfc1905.endOfMibView):
# Re-create future for next GETNEXT iteration
future = asyncio.Future()
future.add_done_callback(cbFun)
# This also indicates that we wish to continue walking
status['future'] = future
return
# This also terminates internal timer
config.delTransport(
snmpEngine,
udp.domainName
)
# Stop mainloop on SNMP error (optional)
loop.stop()
# Prepare request to be sent, receive an asyncio future object
future = cmdgen.BulkCommandGenerator().sendVarBinds(
snmpEngine,
'my-router',
None, '', # contextEngineId, contextName
0, 25, # non-repeaters, max-repetitions
( ('1.3.6.1.2.1.1', None), ('1.3.6.1.4.1.1', None) )
)
# Register error/response receiver function on future
future.add_done_callback(cbFun)
# Run asyncio main loop
loop.run_forever()
# Clear the event loop
loop.close()
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