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
112
113
114
115
116
117
118
119
120
|
#
# Notification Originator
#
# Send SNMP INFORM notification using the following options:
#
# * SNMPv3
# * with user 'usr-md5-none', auth: MD5, priv NONE
# * over IPv4/UDP
# * using Trollius framework for network transport
# * to a Manager at 127.0.0.1:162
# * send INFORM notification
# * with TRAP ID 'warmStart' specified as an OID
# * include managed object information 1.3.6.1.2.1.1.5.0 = 'system name'
#
# Requires Trollius framework!
#
from pysnmp.entity import engine, config
from pysnmp.entity.rfc3413 import context
from pysnmp.entity.rfc3413.asyncio import ntforg
from pysnmp.carrier.asyncio.dgram import udp
from pysnmp.proto import rfc1902
import trollius
# Get the event loop for this thread
loop = trollius.get_event_loop()
# Create SNMP engine instance
snmpEngine = engine.SnmpEngine()
# SNMPv3/USM setup
# Add USM user
config.addV3User(
snmpEngine, 'usr-md5-none',
config.usmHMACMD5AuthProtocol, 'authkey1'
)
config.addTargetParams(snmpEngine, 'my-creds', 'usr-md5-none', 'authNoPriv')
# Transport setup
#
# Setup transport endpoint and bind it with security settings yielding
# a target name. Since Notifications could be sent to multiple Managers
# at once, more than one target entry may be configured (and tagged).
#
config.addTransport(
snmpEngine,
udp.domainName,
udp.UdpTransport().openClientMode()
)
config.addTargetAddr(
snmpEngine, 'my-nms',
udp.domainName, ('127.0.0.1', 162),
'my-creds',
tagList='all-my-managers'
)
# Specify what kind of notification should be sent (TRAP or INFORM),
# to what targets (chosen by tag) and what filter should apply to
# the set of targets (selected by tag)
config.addNotificationTarget(
snmpEngine, 'my-notification', 'my-filter', 'all-my-managers', 'inform'
)
# Allow NOTIFY access to Agent's MIB by this SNMP model (3), securityLevel
# and SecurityName
config.addContext(snmpEngine, '')
config.addVacmUser(snmpEngine, 3, 'usr-md5-none', 'authNoPriv', (), (), (1,3,6))
@trollius.coroutine
def snmpOperation(snmpEngine, target, snmpContext, contextName,
notificationName, instanceIndex, additionalVarBinds):
( snmpEngine,
errorIndication,
errorStatus,
errorIndex,
varBinds ) = yield trollius.From(
ntforg.NotificationOriginator().sendVarBinds(
snmpEngine,
target,
snmpContext,
contextName,
notificationName,
instanceIndex,
additionalVarBinds
)
)
print('Notification status - %s' % (
errorIndication and errorIndication or 'delivered'
)
)
# This also terminates internal timer
config.delTransport(
snmpEngine,
udp.domainName
).closeTransport()
# Initiate sending SNMP message
loop.run_until_complete(
snmpOperation(
snmpEngine,
# Notification targets
'my-notification',
# Default SNMP context where contextEngineId == SnmpEngineId
context.SnmpContext(snmpEngine),
# contextName
'',
# notification name (SNMPv2-MIB::coldStart)
(1,3,6,1,6,3,1,1,5,1),
# notification objects instance index
None,
# additional var-binds: ( (oid, value), ... )
[ ((1,3,6,1,2,1,1,5,0), rfc1902.OctetString('system name')) ]
)
)
# Clear the event loop
loop.close()
|
