Hello I'm trying to listen for traps with this code from pysnmp doc:
from pysnmp.carrier.asynsock.dispatch import AsynsockDispatcher
from pysnmp.carrier.asynsock.dgram import udp, udp6
from pyasn1.codec.ber import decoder
from pysnmp.proto import api
def cbFun(transportDispatcher, transportDomain, transportAddress, wholeMsg):
print('cbFun is called')
while wholeMsg:
print('loop...')
msgVer = int(api.decodeMessageVersion(wholeMsg))
if msgVer in api.protoModules:
pMod = api.protoModules[msgVer]
else:
print('Unsupported SNMP version %s' % msgVer)
return
reqMsg, wholeMsg = decoder.decode(
wholeMsg, asn1Spec=pMod.Message(),
)
print('Notification message from %s:%s: ' % (
transportDomain, transportAddress
)
)
reqPDU = pMod.apiMessage.getPDU(reqMsg)
if reqPDU.isSameTypeWith(pMod.TrapPDU()):
if msgVer == api.protoVersion1:
print('Enterprise: %s' % (
pMod.apiTrapPDU.getEnterprise(reqPDU).prettyPrint()
)
)
print('Agent Address: %s' % (
pMod.apiTrapPDU.getAgentAddr(reqPDU).prettyPrint()
)
)
print('Generic Trap: %s' % (
pMod.apiTrapPDU.getGenericTrap(reqPDU).prettyPrint()
)
)
print('Specific Trap: %s' % (
pMod.apiTrapPDU.getSpecificTrap(reqPDU).prettyPrint()
)
)
print('Uptime: %s' % (
pMod.apiTrapPDU.getTimeStamp(reqPDU).prettyPrint()
)
)
varBinds = pMod.apiTrapPDU.getVarBindList(reqPDU)
else:
varBinds = pMod.apiPDU.getVarBindList(reqPDU)
print('Var-binds:')
for oid, val in varBinds:
print('%s = %s' % (oid.prettyPrint(), val.prettyPrint()))
return wholeMsg
transportDispatcher = AsynsockDispatcher()
transportDispatcher.registerRecvCbFun(cbFun)
# UDP/IPv4
transportDispatcher.registerTransport(
udp.domainName, udp.UdpSocketTransport().openServerMode(('localhost', 162))
)
# UDP/IPv6
transportDispatcher.registerTransport(
udp6.domainName, udp6.Udp6SocketTransport().openServerMode(('::1', 162))
)
transportDispatcher.jobStarted(1)
try:
# Dispatcher will never finish as job#1 never reaches zero
print('run dispatcher')
transportDispatcher.runDispatcher()
except:
transportDispatcher.closeDispatcher()
raise
But when I test it with this command:
$ snmptrap -v1 -c public 127.0.0.1 1.3.6.1.4.1.20408.4.1.1.2
127.0.0.1 1 1 123 1.3.6.1.2.1.1.1.0 s test
Nothing is displayed. Could someone help me ? Everything I want is to display traps received by this receiver.
EDIT: I added some prints and this is what I get when I run the program:
C:\user\snmp\test>python fonction.py
rundispatcher
_
When I send a trap, nothing displays. When I press Ctrl+C I get:
C:\user\snmp\test>python fonction.py
rundispatcher
Traceback (most recent call last):
File "fonction.py", line 73, in <module>
transportDispatcher.runDispatcher()
File "C:\user\snmp\test\pysnmp\carrier\asyncore\dispatch.py", line 37, in runDispatcher
use_poll=True, map=self.__sockMap, count=1)
File "C:\Python27\lib\asyncore.py", line 220, in loop
poll_fun(timeout, map)
File "C:\Python27\lib\asyncore.py", line 145, in poll
r, w, e = select.select(r, w, e, timeout)
KeyboardInterrupt
