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twisted.transit: tolerate the lack of a listener

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In Tor mode, there is no local listener. Eventually we'll add an Onion
Service listener, but it's not guaranteed that we can run one.
This commit is contained in:
Brian Warner 2016-03-03 12:24:58 -08:00
parent 8d92b40139
commit 08a5e6043a
1 changed files with 6 additions and 1 deletions
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7
src/wormhole/twisted/transit.py
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@ -504,6 +504,10 @@ class Common:
# listener will win.
self._my_direct_hints, self._listener = self._build_listener()
if self._listener is None: # don't listen
self._listener_d = None
return defer.succeed(self._my_direct_hints) # empty
# Start the server, so it will be running by the time anyone tries to
# connect to the direct hints we return.
f = InboundConnectionFactory(self)
@ -617,7 +621,8 @@ class Common:
# have any viable direct hints, then they're either going to succeed
# quickly or hang for a long time.
contenders = []
contenders.append(self._listener_d)
if self._listener_d:
contenders.append(self._listener_d)
relay_delay = 0
for hint in self._their_direct_hints: