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"""
Multiple SNMP communities
+++++++++++++++++++++++++
Respond to SNMP GET/SET/GETNEXT queries with the following options:
* SNMPv1
* with SNMP community "public" (read access) or "private" (write access)
* allow access to SNMPv2-MIB objects (1.3.6.1.2.1)
* over IPv4/UDP, listening at 127.0.0.1:161
Allow read/write access to all objects in the same MIB subtree.
The following Net-SNMP's commands will GET/SET a value at this Agent:
| $ snmpget -v1 -c public 127.0.0.1 SNMPv2-MIB::sysLocation.0
| $ snmpset -v1 -c private 127.0.0.1 SNMPv2-MIB::sysLocation.0 s "far away"
"""#
from pysnmp.entity import engine, config
from pysnmp.entity.rfc3413 import cmdrsp, context
from pysnmp.carrier.asyncore.dgram import udp
# Create SNMP engine with autogenernated engineID and pre-bound
# to socket transport dispatcher
snmpEngine = engine.SnmpEngine()
# Transport setup
# UDP over IPv4
config.addTransport(
snmpEngine, udp.domainName, udp.UdpTransport().openServerMode(("127.0.0.1", 161))
)
# SNMPv1 setup
# SecurityName <-> CommunityName mapping.
# Here we configure two distinct CommunityName's to control read and write
# operations.
config.addV1System(snmpEngine, "my-read-area", "public")
config.addV1System(snmpEngine, "my-write-area", "private")
# Allow full MIB access for this user / securityModels at VACM
config.addVacmUser(snmpEngine, 1, "my-read-area", "noAuthNoPriv", (1, 3, 6, 1, 2, 1))
config.addVacmUser(
snmpEngine,
1,
"my-write-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)
# Register an imaginary never-ending job to keep I/O dispatcher running forever
snmpEngine.transportDispatcher.jobStarted(1)
# Run I/O dispatcher which would receive queries and send responses
try:
snmpEngine.transportDispatcher.runDispatcher()
except:
snmpEngine.transportDispatcher.closeDispatcher()
raise
|
