handle ZeroReturnError raised by PyOpenSSL

src/common/xmpp/tls_nb.py

@@ -165,6 +165,10 @@ class PyOpenSSLWrapper(SSLWrapper):
 			log.debug("Recv: Got OpenSSL.SSL.SysCallError: " + repr(e),
 				exc_info=True)
 			raise SSLWrapper.Error(self.sock or self.sslobj, e)
+		except OpenSSL.SSL.ZeroReturnError, e:
+			# end-of-connection raises ZeroReturnError instead of having the
+			# connection's .recv() method return a zero-sized result.
+			raise SSLWrapper.Error(self.sock or self.sslobj, e, -1)
 		except OpenSSL.SSL.Error, e:
 			if self.is_numtoolarge(e):
 				# warn, but ignore this exception