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"""
SET string and integer scalars (SNMPv1)
+++++++++++++++++++++++++++++++++++++++
Send a SNMP SET request
* with SNMPv1, community 'private'
* using Twisted framework for network transport
* over IPv4/UDP
* to an Agent at 195.218.195.228:161
* for OIDs in tuple form and an integer and string-typed values
This script performs similar to the following Net-SNMP command:
| $ snmpset -v1 -c private -ObentU 195.218.195.228:161 1.3.6.1.2.1.1.9.1.3.1 s 'my value' 1.3.6.1.2.1.1.9.1.4.1 t 123
"""#
from twisted.internet import reactor, defer
from pysnmp.entity import engine, config
from pysnmp.entity.rfc3413.twisted import cmdgen
from pysnmp.proto import rfc1902
from pysnmp.carrier.twisted.dgram import udp
# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()
#
# SNMPv1 setup
#
# SecurityName <-> CommunityName mapping
config.addV1System(snmpEngine, 'my-area', 'private')
# Specify security settings per SecurityName (SNMPv1 - 0, SNMPv2c - 1)
config.addTargetParams(snmpEngine, 'my-creds', 'my-area', 'noAuthNoPriv', 0)
#
# Setup transport endpoint and bind it with security settings yielding
# a target name
#
# UDP/IPv4
config.addTransport(
snmpEngine,
udp.domainName,
udp.UdpTwistedTransport().openClientMode()
)
config.addTargetAddr(
snmpEngine, 'my-router',
udp.domainName, ('195.218.195.228', 161),
'my-creds'
)
# Error/response receiver
def cbFun(response, *args):
snmpEngine, errorIndication, errorStatus, errorIndex, varBinds = response
if errorIndication:
print(errorIndication)
# SNMPv1 response may contain noSuchName error *and* SNMPv2c exception,
# so we ignore noSuchName error here
elif errorStatus and errorStatus != 2:
print('%s at %s' % (
errorStatus.prettyPrint(),
errorIndex and varBinds[int(errorIndex)-1][0] or '?'
)
)
else:
for oid, val in varBinds:
print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))
reactor.stop()
# Prepare request to be sent yielding Twisted deferred object
df = cmdgen.SetCommandGenerator().sendVarBinds(
snmpEngine,
'my-router',
None, '', # contextEngineId, contextName
[ ((1,3,6,1,2,1,1,9,1,3,1), rfc1902.OctetString('my value')),
((1,3,6,1,2,1,1,9,1,4,1), rfc1902.Integer(123)) ]
)
# Register error/response receiver function at deferred
df.addCallback(cbFun)
# Run Twisted main loop
reactor.run()
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