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-rw-r--r--src/leap/base/network.py107
1 files changed, 107 insertions, 0 deletions
diff --git a/src/leap/base/network.py b/src/leap/base/network.py
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+++ b/src/leap/base/network.py
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+# -*- coding: utf-8 -*-
+from __future__ import (print_function)
+import logging
+import threading
+
+from leap.eip import config as eipconfig
+from leap.base.checks import LeapNetworkChecker
+from leap.base.constants import ROUTE_CHECK_INTERVAL
+from leap.base.exceptions import TunnelNotDefaultRouteError
+from leap.util.misc import null_check
+from leap.util.coroutines import (launch_thread, process_events)
+
+from time import sleep
+
+logger = logging.getLogger(name=__name__)
+
+
+class NetworkCheckerThread(object):
+ """
+ Manages network checking thread that makes sure we have a working network
+ connection.
+ """
+ def __init__(self, *args, **kwargs):
+
+ self.status_signals = kwargs.pop('status_signals', None)
+ self.error_cb = kwargs.pop(
+ 'error_cb',
+ lambda exc: logger.error("%s", exc.message))
+ self.shutdown = threading.Event()
+
+ # XXX get provider passed here
+ provider = kwargs.pop('provider', None)
+ null_check(provider, 'provider')
+
+ eipconf = eipconfig.EIPConfig(domain=provider)
+ eipconf.load()
+ eipserviceconf = eipconfig.EIPServiceConfig(domain=provider)
+ eipserviceconf.load()
+
+ gw = eipconfig.get_eip_gateway(
+ eipconfig=eipconf,
+ eipserviceconfig=eipserviceconf)
+ self.checker = LeapNetworkChecker(
+ provider_gw=gw)
+
+ def start(self):
+ self.process_handle = self._launch_recurrent_network_checks(
+ (self.error_cb,))
+
+ def stop(self):
+ self.process_handle.join(timeout=0.1)
+ self.shutdown.set()
+ logger.debug("network checked stopped.")
+
+ def run_checks(self):
+ pass
+
+ #private methods
+
+ #here all the observers in fail_callbacks expect one positional argument,
+ #which is exception so we can try by passing a lambda with logger to
+ #check it works.
+
+ def _network_checks_thread(self, fail_callbacks):
+ #TODO: replace this with waiting for a signal from openvpn
+ while True:
+ try:
+ self.checker.check_tunnel_default_interface()
+ break
+ except TunnelNotDefaultRouteError:
+ # XXX ??? why do we sleep here???
+ # aa: If the openvpn isn't up and running yet,
+ # let's give it a moment to breath.
+ #logger.error('NOT DEFAULT ROUTE!----')
+ # Instead of this, we should flag when the
+ # iface IS SUPPOSED to be up imo. -- kali
+ sleep(1)
+
+ fail_observer_dict = dict(((
+ observer,
+ process_events(observer)) for observer in fail_callbacks))
+
+ while not self.shutdown.is_set():
+ try:
+ self.checker.check_tunnel_default_interface()
+ self.checker.check_internet_connection()
+ sleep(ROUTE_CHECK_INTERVAL)
+ except Exception as exc:
+ for obs in fail_observer_dict:
+ fail_observer_dict[obs].send(exc)
+ sleep(ROUTE_CHECK_INTERVAL)
+
+ #reset event
+ # I see a problem with this. You cannot stop it, it
+ # resets itself forever. -- kali
+
+ # XXX use QTimer for the recurrent triggers,
+ # and ditch the sleeps.
+ logger.debug('resetting event')
+ self.shutdown.clear()
+
+ def _launch_recurrent_network_checks(self, fail_callbacks):
+ # XXX reimplement using QTimer -- kali
+ watcher = launch_thread(
+ self._network_checks_thread,
+ (fail_callbacks,))
+ return watcher