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"""
Send packets from specific local interface
++++++++++++++++++++++++++++++++++++++++++
Send a series of SNMP GETNEXT requests with the following options:
* with SNMPv2c, community 'public'
* over IPv4/UDP
* to an Agent at 104.236.166.95:161
* sending packets from primary local interface 0.0.0.0, local port 61024
* 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:
| $ snmpwalk -v2c -c public -ObentU 104.236.166.95 1.3.6.1.2.1.1 1.3.6.1.4.1.1
"""#
from pysnmp.entity import engine, config
from pysnmp.carrier.asyncore.dgram import udp
from pysnmp.entity.rfc3413 import cmdgen
# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()
#
# SNMPv1/2c setup (if you use SNMPv1 or v2c)
#
# 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', 0)
#
# Setup transport endpoint and bind it with security settings yielding
# a target name
#
# UDP/IPv4
config.addTransport(
snmpEngine,
udp.DOMAIN_NAME,
udp.UdpSocketTransport().openClientMode(('0.0.0.0', 61024))
)
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, varBindTable, cbCtx):
if errorIndication:
print(errorIndication)
return
if errorStatus:
print('%s at %s' % (errorStatus.prettyPrint(),
errorIndex and varBindTable[-1][int(errorIndex) - 1][0] or '?'))
return # stop on error
for varBindRow in varBindTable:
for oid, val in varBindRow:
print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))
return 1 # signal dispatcher to continue
# Prepare initial request to be sent
cmdgen.NextCommandGenerator().sendVarBinds(
snmpEngine,
'my-router',
None, '', # contextEngineId, contextName
[((1, 3, 6, 1, 2, 1, 1), None),
((1, 3, 6, 1, 2, 1, 11), None)],
cbFun
)
# Run I/O dispatcher which would send pending queries and process responses
snmpEngine.transportDispatcher.runDispatcher()
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