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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
#
# GETNEXT Command Generator
#
# Send a series of SNMP GETNEXT requests
# with SNMPv3 with user 'usr-none-none', no auth and no privacy protocols
# using Trollius framework for network transport
# over IPv4/UDP
# to an Agent at 195.218.195.228:161
# for an OID in string 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 195.218.195.228 1.3.6.1.2.1.1 1.3.6.1.4.1.1
#
# Requires Trollius framework!
#
from pysnmp.entity import engine, config
from pysnmp.proto import rfc1905
from pysnmp.entity.rfc3413.asyncio import cmdgen
from pysnmp.carrier.asyncio.dgram import udp
import trollius
# Get the event loop for this thread
loop = trollius.get_event_loop()
# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()
#
# SNMPv3/USM setup
#
# user: usr-none-none, auth: none, priv: none
config.addV3User(
snmpEngine, 'usr-none-none',
)
config.addTargetParams(snmpEngine, 'my-creds', 'usr-none-none', 'noAuthNoPriv')
#
# Setup transport endpoint and bind it with security settings yielding
# a target name
#
# UDP/IPv4
config.addTransport(
snmpEngine,
udp.domainName,
udp.UdpTransport().openClientMode()
)
config.addTargetAddr(
snmpEngine, 'my-router',
udp.domainName, ('195.218.195.228', 161),
'my-creds'
)
@trollius.coroutine
def snmpOperation(snmpEngine, target, contextEngineId, contextName, varBinds):
initialVarBinds = varBinds
while varBinds:
( snmpEngine,
errorIndication,
errorStatus,
errorIndex,
varBindTable ) = yield trollius.From(
cmdgen.NextCommandGenerator().sendVarBinds(
snmpEngine,
target,
contextEngineId,
contextName,
varBinds
)
)
if errorIndication:
print(errorIndication)
break
elif errorStatus:
print('%s at %s' % (
errorStatus.prettyPrint(),
errorIndex and varBindTable[-1][int(errorIndex)-1][0] or '?'
)
)
break
else:
for varBindRow in varBindTable:
for oid, val in varBindRow:
print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))
errorIndication, varBinds = cmdgen.getNextVarBinds(
initialVarBinds, varBindRow
)
# This also terminates internal timer
config.delTransport(
snmpEngine,
udp.domainName
).closeTransport()
loop.stop()
loop.run_until_complete(
snmpOperation(
snmpEngine,
'my-router',
None, '', # contextEngineId, contextName
( ('1.3.6.1.2.1.1', None), ('1.3.6.1.2.1.11', None) )
)
)
loop.close()
|
