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#
# Multithreaded, synchronous Command Generator
#
# Send a bunch of SNMP GET requests simultaneously using the following options:
#
# * process 5 GET requests in 3 parallel threads
# * with SNMPv1, community 'public' and
# with SNMPv2c, community 'public' and
# with SNMPv3, user 'usr-md5-des', MD5 auth and DES privacy
# * over IPv4/UDP and
# over IPv6/UDP
# * to an Agent at demo.snmplabs.com:161 and
# to an Agent at [::1]:161
# * for instances of SNMPv2-MIB::sysDescr.0 and
# SNMPv2-MIB::sysLocation.0 MIB objects
#
from sys import version_info
if version_info[0] == 2:
from Queue import Queue
else:
from queue import Queue
from threading import Thread
from pysnmp.entity.rfc3413.oneliner import cmdgen
# List of targets in the followin format:
# ( ( authData, transportTarget, varNames ), ... )
targets = (
# 1-st target (SNMPv1 over IPv4/UDP)
( cmdgen.CommunityData('public', mpModel=0),
cmdgen.UdpTransportTarget(('demo.snmplabs.com', 161)),
( cmdgen.ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0),
cmdgen.ObjectIdentity('SNMPv2-MIB', 'sysLocation', 0) ) ),
# 2-nd target (SNMPv2c over IPv4/UDP)
( cmdgen.CommunityData('public'),
cmdgen.UdpTransportTarget(('demo.snmplabs.com', 161)),
( cmdgen.ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0),
cmdgen.ObjectIdentity('SNMPv2-MIB', 'sysLocation', 0) ) ),
# 3-nd target (SNMPv2c over IPv4/UDP) - same community and
# different transport address.
( cmdgen.CommunityData('public'),
cmdgen.UdpTransportTarget(('localhost', 161)),
( cmdgen.ObjectIdentity('SNMPv2-MIB', 'sysContact', 0),
cmdgen.ObjectIdentity('SNMPv2-MIB', 'sysName', 0) ) ),
# 4-nd target (SNMPv3 over IPv4/UDP)
( cmdgen.UsmUserData('usr-md5-des', 'authkey1', 'privkey1'),
cmdgen.UdpTransportTarget(('demo.snmplabs.com', 161)),
( cmdgen.ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0),
cmdgen.ObjectIdentity('SNMPv2-MIB', 'sysLocation', 0) ) ),
# 5-th target (SNMPv3 over IPv6/UDP)
( cmdgen.UsmUserData('usr-md5-none', 'authkey1'),
cmdgen.Udp6TransportTarget(('::1', 161)),
( cmdgen.ObjectIdentity('SNMPv2-MIB', 'sysDescr', 0),
cmdgen.ObjectIdentity('SNMPv2-MIB', 'sysLocation', 0) ) ),
# N-th target
# ...
)
class Worker(Thread):
def __init__(self, requests, responses):
Thread.__init__(self)
self.requests = requests
self.responses = responses
self.cmdGen = cmdgen.CommandGenerator()
self.setDaemon(True)
self.start()
def run(self):
while True:
authData, transportTarget, varNames = self.requests.get()
self.responses.append(
self.cmdGen.getCmd(
authData, transportTarget, *varNames,
**{ 'lookupNames': True, 'lookupValues': True }
)
)
if hasattr(self.requests, 'task_done'): # 2.5+
self.requests.task_done()
class ThreadPool:
def __init__(self, num_threads):
self.requests = Queue(num_threads)
self.responses = []
for _ in range(num_threads):
Worker(self.requests, self.responses)
def addRequest(self, authData, transportTarget, varBinds):
self.requests.put((authData, transportTarget, varBinds))
def getResponses(self): return self.responses
def waitCompletion(self):
if hasattr(self.requests, 'join'):
self.requests.join() # 2.5+
else:
from time import sleep
# this is a lame substitute for missing .join()
# adding an explicit synchronization might be a better solution
while not self.requests.empty():
sleep(1)
pool = ThreadPool(3)
# Submit GET requests
for authData, transportTarget, varNames in targets:
pool.addRequest(authData, transportTarget, varNames)
# Wait for responses or errors
pool.waitCompletion()
# Walk through responses
for errorIndication, errorStatus, errorIndex, varBinds in pool.getResponses():
print('Response for %s from %s:' % (authData, transportTarget))
if errorIndication:
print(errorIndication)
if errorStatus:
print('%s at %s' % (
errorStatus.prettyPrint(),
errorIndex and varBinds[int(errorIndex)-1][0] or '?'
)
)
for oid, val in varBinds:
if val is None:
print(oid.prettyPrint())
else:
print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))
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