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"""
Custom ContextEngineId and ContextName
++++++++++++++++++++++++++++++++++++++
Send a SNMP GET request with the following options:
* with SNMPv3 with user 'usr-md5-none', SHA auth and no privacy protocols
* for MIB instance identified by
* contextEngineId: 0x80004fb805636c6f75644dab22cc,
* contextName: da761cfc8c94d3aceef4f60f049105ba
* over IPv4/UDP
* to an Agent at 104.236.166.95:161
* for an OID in tuple form
This script performs similar to the following Net-SNMP command:
| $ snmpget -v3 -l authNoPriv -u usr-md5-none -A authkey1 -E 80004fb805636c6f75644dab22cc -n da761cfc8c94d3aceef4f60f049105ba -ObentU 104.236.166.95:161 1.3.6.1.2.1.1.1.0
"""#
from pysnmp.entity import engine, config
from pysnmp.carrier.asyncore.dgram import udp
from pysnmp.entity.rfc3413 import cmdgen
from pysnmp.proto import rfc1902
# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()
#
# SNMPv3/USM setup
#
# user: usr-md5-none, auth: MD5, priv: NONE
config.addV3User(
snmpEngine, 'usr-md5-none',
config.USM_AUTH_HMAC96_MD5, 'authkey1'
)
config.addTargetParams(snmpEngine, 'my-creds', 'usr-md5-none', 'authNoPriv')
#
# Setup transport endpoint and bind it with security settings yielding
# a target name
#
# UDP/IPv4
config.addTransport(
snmpEngine,
udp.DOMAIN_NAME,
udp.UdpSocketTransport().openClientMode()
)
config.addTargetAddr(
snmpEngine, 'my-router',
udp.DOMAIN_NAME, ('104.236.166.95', 161),
'my-creds'
)
# Error/response receiver
# noinspection PyUnusedLocal,PyUnusedLocal,PyUnusedLocal
def cbFun(snmpEngine, sendRequestHandle, errorIndication,
errorStatus, errorIndex, varBinds, cbCtx):
if errorIndication:
print(errorIndication)
elif errorStatus:
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()))
# Prepare and send a request message, pass custom ContextEngineId & ContextName
cmdgen.GetCommandGenerator().sendVarBinds(
snmpEngine,
'my-router',
# contextEngineId
rfc1902.OctetString(hexValue='80004fb805636c6f75644dab22cc'),
# contextName
rfc1902.OctetString('da761cfc8c94d3aceef4f60f049105ba'),
[((1, 3, 6, 1, 2, 1, 1, 1, 0), None)],
cbFun
)
# Run I/O dispatcher which would send pending queries and process responses
snmpEngine.transportDispatcher.runDispatcher()
|
