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"""
SET string and integer scalars (SNMPv2c)
++++++++++++++++++++++++++++++++++++++++
Perform SNMP SET operation with the following options:
* with SNMPv2c, community 'public'
* over IPv4/UDP
* to an Agent at demo.pysnmp.com:161
* for OIDs in string form and values in form of pyasn1 objects
This script performs similar to the following Net-SNMP command:
| $ snmpset -v2c -c public -ObentU demo.pysnmp.com 1.3.6.1.2.1.1.9.1.3.1 s 'New description' 1.3.6.1.2.1.1.9.1.4.1 t 12
""" #
from pysnmp.carrier.asyncio.dispatch import AsyncioDispatcher
from pysnmp.carrier.asyncio.dgram import udp
from pyasn1.codec.ber import encoder, decoder
from pysnmp.proto import api
# Protocol version to use
# pMod = api.PROTOCOL_MODULES[api.SNMP_VERSION_1]
pMod = api.PROTOCOL_MODULES[api.SNMP_VERSION_2C]
# Build PDU
reqPDU = pMod.SetRequestPDU()
pMod.apiPDU.set_defaults(reqPDU)
pMod.apiPDU.set_varbinds(
reqPDU,
# A list of Var-Binds to SET
(
("1.3.6.1.2.1.1.9.1.3.1", pMod.OctetString("New system description")),
("1.3.6.1.2.1.1.9.1.4.1", pMod.TimeTicks(12)),
),
)
# Build message
reqMsg = pMod.Message()
pMod.apiMessage.set_defaults(reqMsg)
pMod.apiMessage.set_community(reqMsg, "public")
pMod.apiMessage.set_pdu(reqMsg, reqPDU)
# noinspection PyUnusedLocal,PyUnusedLocal
def __callback(
transportDispatcher, transportDomain, transportAddress, wholeMsg, reqPDU=reqPDU
):
while wholeMsg:
rspMsg, wholeMsg = decoder.decode(wholeMsg, asn1Spec=pMod.Message())
rspPDU = pMod.apiMessage.get_pdu(rspMsg)
# Match response to request
if pMod.apiPDU.get_request_id(reqPDU) == pMod.apiPDU.get_request_id(rspPDU):
# Check for SNMP errors reported
errorStatus = pMod.apiPDU.get_error_status(rspPDU)
if errorStatus:
print(errorStatus.prettyPrint())
else:
for oid, val in pMod.apiPDU.get_varbinds(rspPDU):
print(f"{oid.prettyPrint()} = {val.prettyPrint()}")
transportDispatcher.job_finished(1)
return wholeMsg
transportDispatcher = AsyncioDispatcher()
transportDispatcher.register_recv_callback(__callback)
# UDP/IPv4
transportDispatcher.register_transport(
udp.DOMAIN_NAME, udp.UdpAsyncioTransport().open_client_mode()
)
# Pass message to dispatcher
transportDispatcher.send_message(
encoder.encode(reqMsg), udp.DOMAIN_NAME, ("demo.pysnmp.com", 161)
)
transportDispatcher.job_started(1)
# Dispatcher will finish as job#1 counter reaches zero
transportDispatcher.run_dispatcher(3)
transportDispatcher.close_dispatcher()
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