1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
"""
Custom ContextEngineId and ContextName
++++++++++++++++++++++++++++++++++++++
Send a SNMP GET request
* with SNMPv3 with user 'usr-md5-none', SHA auth and no privacy protocols
* for MIB instance identified by
* contextEngineId: 0x80004fb805636c6f75644dab22cc
* contextName: da761cfc8c94d3aceef4f60f049105ba
* using Twisted framework for network transport
* over IPv4/UDP
* to an Agent at 195.218.195.228:161
* 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 195.218.195.228:161 1.3.6.1.2.1.1.1.0
"""#
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()
#
# SNMPv3/USM setup
#
# user: usr-md5-none, auth: MD5, priv: NONE
config.addV3User(
snmpEngine, 'usr-md5-none',
config.usmHMACMD5AuthProtocol, '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.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)
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()))
reactor.stop()
# Prepare request to be sent yielding Twisted deferred object
df = cmdgen.GetCommandGenerator().sendVarBinds(
snmpEngine,
'my-router',
rfc1902.OctetString(hexValue='80004fb805636c6f75644dab22cc'),
rfc1902.OctetString('da761cfc8c94d3aceef4f60f049105ba'),
[ ('1.3.6.1.2.1.1.1.0', None) ]
)
# Register error/response receiver function at deferred
df.addCallback(cbFun)
# Run Twisted main loop
reactor.run()
|
