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# Implements twisted-based UDP transport
import sys
from twisted.internet import reactor
from pysnmp.carrier.base import AbstractTransportAddress
from pysnmp.carrier.twisted.dgram.base import DgramTwistedTransport
from pysnmp.carrier import error
domainName = snmpUDPDomain = (1, 3, 6, 1, 6, 1, 1)
class UdpTransportAddress(tuple, AbstractTransportAddress): pass
class UdpTwistedTransport(DgramTwistedTransport):
addressType = UdpTransportAddress
# AbstractTwistedTransport API
def openClientMode(self, iface=None):
if iface is None:
iface = ('', 0)
try:
self._lport = reactor.listenUDP(iface[1], self, iface[0])
except Exception:
raise error.CarrierError(sys.exc_info()[1])
return self
def openServerMode(self, iface):
try:
self._lport = reactor.listenUDP(iface[1], self, iface[0])
except Exception:
raise error.CarrierError(sys.exc_info()[1])
return self
def closeTransport(self):
d = self._lport.stopListening()
d and d.addCallback(lambda x: None)
DgramTwistedTransport.closeTransport(self)
UdpTransport = UdpTwistedTransport
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