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#
# Command Responder
#
# Listen and respond to SNMP GET/SET/GETNEXT/GETBULK queries with
# the following options:
#
# * SNMPv2c
# * with SNMP community "public"
# * allow access to SNMPv2-MIB objects (1.3.6.1.2.1)
# * over IPv4/UDP, listening at 127.0.0.1:161 and 127.0.0.2:161 interfaces
# * using Twisted framework for network transport
#
# Either of the following Net-SNMP's commands will walk this Agent:
#
# $ snmpwalk -v2c -c public 127.0.0.1 .1.3.6
# $ snmpwalk -v2c -c public 127.0.0.2 .1.3.6
#
from twisted.internet import reactor
from pysnmp.entity import engine, config
from pysnmp.entity.rfc3413 import cmdrsp, context
from pysnmp.carrier.twisted.dgram import udp
# Create SNMP engine with autogenernated engineID and pre-bound
# to socket transport dispatcher
snmpEngine = engine.SnmpEngine()
# Transport setup
# UDP over IPv4 at 127.0.0.1:161
config.addTransport(
snmpEngine,
udp.domainName + (1,),
udp.UdpTwistedTransport().openServerMode(('127.0.0.1', 161))
)
# UDP over IPv4 at 127.0.0.2:161
config.addTransport(
snmpEngine,
udp.domainName + (2,),
udp.UdpTwistedTransport().openServerMode(('127.0.0.2', 161))
)
# SNMPv2c setup
# SecurityName <-> CommunityName mapping.
config.addV1System(snmpEngine, 'my-area', 'public')
# Allow full MIB access for this user / securityModels at VACM
config.addVacmUser(snmpEngine, 2, 'my-area', 'noAuthNoPriv', (1,3,6,1,2,1), (1,3,6,1,2,1))
# Get default SNMP context this SNMP engine serves
snmpContext = context.SnmpContext(snmpEngine)
# Register SNMP Applications at the SNMP engine for particular SNMP context
cmdrsp.GetCommandResponder(snmpEngine, snmpContext)
cmdrsp.SetCommandResponder(snmpEngine, snmpContext)
cmdrsp.NextCommandResponder(snmpEngine, snmpContext)
cmdrsp.BulkCommandResponder(snmpEngine, snmpContext)
# Run Twisted main loop
reactor.run()
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