def _connectedProtocol(self, interface=""):
"""
Return a new L{DNSDatagramProtocol} bound to a randomly selected port
number.
"""
failures = 0
proto = dns.DNSDatagramProtocol(self, reactor=self._reactor)
while True:
try:
self._reactor.listenUDP(dns.randomSource(),
proto,
interface=interface)
except error.CannotListenError as e:
failures += 1
if (hasattr(e.socketError, "errno")
and e.socketError.errno == errno.EMFILE):
# We've run out of file descriptors. Stop trying.
raise
if failures >= 1000:
# We've tried a thousand times and haven't found a port.
# This is almost impossible, and likely means something
# else weird is going on. Raise, as to not infinite loop.
raise
else:
return proto
def _connectedProtocol(self):
"""
Return a new L{ExtendDNSDatagramProtocol} bound to a randomly selected port
number.
"""
proto = ExtendDNSDatagramProtocol(self, reactor=self._reactor)
while True:
try:
self._reactor.listenUDP(dns.randomSource(), proto)
except error.CannotListenError:
pass
else:
return proto
def _connectedProtocol(self):
"""
Return a new L{ExtendDNSDatagramProtocol} bound to a randomly selected port
number.
"""
proto = ExtendDNSDatagramProtocol(self, reactor=self._reactor)
while True:
try:
self._reactor.listenUDP(dns.randomSource(), proto)
except error.CannotListenError:
pass
else:
return proto
def _connectedProtocol(self):
"""
Return a new L{DNSDatagramProtocol} bound to a randomly selected port
number.
"""
if 'protocol' in self.__dict__:
# Some code previously asked for or set the deprecated `protocol`
# attribute, so it probably expects that object to be used for
# queries. Give it back and skip the super awesome source port
# randomization logic. This is actually a really good reason to
# remove this deprecated backward compatibility as soon as
# possible. -exarkun
return self.protocol
proto = dns.DNSDatagramProtocol(self)
while True:
try:
self._reactor.listenUDP(dns.randomSource(), proto)
except error.CannotListenError:
pass
else:
return proto
def _connectedProtocol(self):
"""
Return a new L{DNSDatagramProtocol} bound to a randomly selected port
number.
"""
if 'protocol' in self.__dict__:
# Some code previously asked for or set the deprecated `protocol`
# attribute, so it probably expects that object to be used for
# queries. Give it back and skip the super awesome source port
# randomization logic. This is actually a really good reason to
# remove this deprecated backward compatibility as soon as
# possible. -exarkun
return self.protocol
proto = dns.DNSDatagramProtocol(self)
while True:
try:
self._reactor.listenUDP(dns.randomSource(), proto)
except error.CannotListenError:
pass
else:
return proto
