def getContext(self):
        context = Context(TLSv1_METHOD)
        context.set_info_callback(self._info)
        return context
Verify that the netmask/prefixlen is valid.
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/protocols/test/test_tls.py/HandshakeCallbackContextFactory.getContext--crossover with--dataset/ETHPy150Open anandology/pyjamas/pyjs/src/pyjs/lib/ipaddr.py/IPv6Network._is_valid_netmask