The below code uses the PYSNMP module and works when using port 1062 with IP 127.0.0.1. The only way I can get that same code to work outside of Indigo using port 162 with IP 0.0.0.0 (to catch all traffic) is by calling it as a privilege user (aka using the sudo command).
When not executed as a privileged user or within Indigo with port 162 and IP 0.0.0.0, I receive the following error; "bind() for ('0.0.0.0', 162) failed: [Errno 13] Permission denied".
I do understand that this error, is telling me that I can not bind to port numbers lower than 1024 as a unprivileged user.
What I'm looking for is a work around which would allow me to use this code within Indigo. Or even, how to get Indigo to call it as a privilege user.
The workaround I used in my plugin APCPDU was to call the 'smptrapd' using sudo. That really seems hack-ish, so I'm trying to implement the Trap Handler in the Indigo Plugin.
One thing I have tried is using pfctl Port Forwarding, forwarding all port 162 traffic to port 1062. Upon testing that solution I had some reliability problems, not to mention that you ultimately have to set that up as a privileged user.
Are there any thoughts on a solution?
- Code: Select all
def runConcurrentThread(self):
try:
# Create SNMP engine with autogenernated engineID and pre-bound
# to socket transport dispatcher
snmpEngine = engine.SnmpEngine()
# Transport setup
# UDP over IPv4, first listening interface/port
config.addTransport(
snmpEngine,
udp.domainName + (1,),
udp.UdpTransport().openServerMode(('0.0.0.0', 162))
)
# SNMPv1/2c setup
# SecurityName <-> CommunityName mapping
config.addV1System(snmpEngine, 'my-area', 'public')
# Callback function for receiving notifications
# noinspection PyUnusedLocal,PyUnusedLocal,PyUnusedLocal
def cbFun(snmpEngine, stateReference, contextEngineId, contextName,
varBinds, cbCtx):
for name, val in varBinds:
indigo.server.log('%s = %s' % (name, val))
# Register SNMP Application at the SNMP engine
ntfrcv.NotificationReceiver(snmpEngine, cbFun)
snmpEngine.transportDispatcher.jobStarted(1) # this job would never finish
snmpEngine.transportDispatcher.runDispatcher()
except self.StopThread:
#pass # Optionally catch the StopThread exception and do any needed cleanup.
snmpEngine.transportDispatcher.closeDispatcher()