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authorkali <kali@leap.se>2012-10-08 07:57:42 +0900
committerkali <kali@leap.se>2012-10-08 07:57:42 +0900
commit4d195cd5b6e6600ccf0df78946cab6038a1fcaec (patch)
tree1362b2844f7e008cad8c29f26861566129af6edd /src/leap/base/network.py
parent3a77603eae5fea0b1efb226860e0264ccf96f41b (diff)
parent6728eb9afb21bad867e4052a6190a9bdb34c928a (diff)
Merge branch 'feature/network_check' into develop
Conflicts: src/leap/baseapp/mainwindow.py src/leap/eip/tests/test_checks.py
Diffstat (limited to 'src/leap/base/network.py')
-rw-r--r--src/leap/base/network.py80
1 files changed, 80 insertions, 0 deletions
diff --git a/src/leap/base/network.py b/src/leap/base/network.py
new file mode 100644
index 00000000..e90139c4
--- /dev/null
+++ b/src/leap/base/network.py
@@ -0,0 +1,80 @@
+# -*- coding: utf-8 -*-
+from __future__ import (print_function)
+import logging
+import threading
+
+from leap.base.checks import LeapNetworkChecker
+from leap.base.constants import ROUTE_CHECK_INTERVAL
+from leap.base.exceptions import TunnelNotDefaultRouteError
+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.watcher_cb = 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_gateway and pass it to checker
+ # see in eip.config for function
+ # #718
+ self.checker = LeapNetworkChecker()
+
+ def start(self):
+ self.process_handle = self._launch_recurrent_network_checks(
+ (self.error_cb,))
+
+ def stop(self):
+ 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???
+ 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
+ self.shutdown.clear()
+
+ def _launch_recurrent_network_checks(self, fail_callbacks):
+ #we need to wrap the fail callback in a tuple
+ watcher = launch_thread(
+ self._network_checks_thread,
+ (fail_callbacks,))
+ return watcher