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authorTomás Touceda <chiiph@leap.se>2014-06-06 14:39:30 -0300
committerTomás Touceda <chiiph@leap.se>2014-06-06 14:39:30 -0300
commitc621fa7322b4f8151eb37b27f8aeae563cf6bd63 (patch)
tree55b17318254974378e289f01ec68031ea1f834ad /src/leap/bitmask/services/eip/conductor.py
parent4c550c558dcb554b3ea1bc0246492e39e8532886 (diff)
parent6ab80f96b1ed14ccf96cae37ff207649a26a38ed (diff)
Merge branch 'release-0.5.2'0.5.2
Diffstat (limited to 'src/leap/bitmask/services/eip/conductor.py')
-rw-r--r--src/leap/bitmask/services/eip/conductor.py321
1 files changed, 321 insertions, 0 deletions
diff --git a/src/leap/bitmask/services/eip/conductor.py b/src/leap/bitmask/services/eip/conductor.py
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+# -*- coding: utf-8 -*-
+# conductor.py
+# Copyright (C) 2014 LEAP
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+"""
+EIP Conductor module.
+"""
+import logging
+
+from PySide import QtCore
+
+from leap.bitmask.gui import statemachines
+from leap.bitmask.services import EIP_SERVICE
+from leap.bitmask.services import get_service_display_name
+from leap.bitmask.services.eip.connection import EIPConnection
+from leap.bitmask.platform_init import IS_MAC
+
+QtDelayedCall = QtCore.QTimer.singleShot
+logger = logging.getLogger(__name__)
+
+
+class EIPConductor(object):
+
+ def __init__(self, settings, backend, **kwargs):
+ """
+ Initializes EIP Conductor.
+
+ :param settings:
+ :type settings:
+
+ :param backend:
+ :type backend:
+ """
+ self.eip_connection = EIPConnection()
+ self.eip_name = get_service_display_name(EIP_SERVICE)
+ self._settings = settings
+ self._backend = backend
+
+ self._eip_status = None
+
+ @property
+ def qtsigs(self):
+ return self.eip_connection.qtsigs
+
+ def add_eip_widget(self, widget):
+ """
+ Keep a reference to the passed eip status widget.
+
+ :param widget: the EIP Status widget.
+ :type widget: QWidget
+ """
+ self._eip_status = widget
+
+ def connect_signals(self):
+ """
+ Connect signals.
+ """
+ self.qtsigs.connecting_signal.connect(self._start_eip)
+
+ self.qtsigs.disconnecting_signal.connect(self._stop_eip)
+ self.qtsigs.disconnected_signal.connect(self._eip_status.eip_stopped)
+
+ def connect_backend_signals(self):
+ """
+ Connect to backend signals.
+ """
+ signaler = self._backend.signaler
+
+ # for conductor
+ signaler.eip_process_restart_tls.connect(self._do_eip_restart)
+ signaler.eip_process_restart_tls.connect(self._do_eip_failed)
+ signaler.eip_process_restart_ping.connect(self._do_eip_restart)
+ signaler.eip_process_finished.connect(self._eip_finished)
+
+ # for widget
+ self._eip_status.connect_backend_signals()
+
+ def start_eip_machine(self, action):
+ """
+ Initializes and starts the EIP state machine.
+ Needs the reference to the eip_status widget not to be empty.
+
+ :action: QtAction
+ """
+ action = action
+ button = self._eip_status.eip_button
+ label = self._eip_status.eip_label
+
+ builder = statemachines.ConnectionMachineBuilder(self.eip_connection)
+ eip_machine = builder.make_machine(button=button,
+ action=action,
+ label=label)
+ self.eip_machine = eip_machine
+ self.eip_machine.start()
+ logger.debug('eip machine started')
+
+ def do_connect(self):
+ """
+ Start the connection procedure.
+ Emits a signal that triggers the OFF -> Connecting sequence.
+ This will call _start_eip via the state machine.
+ """
+ self.qtsigs.do_connect_signal.emit()
+
+ def tear_fw_down(self):
+ """
+ Tear the firewall down.
+ """
+ self._backend.tear_fw_down()
+
+ @QtCore.Slot()
+ def _start_eip(self):
+ """
+ Starts EIP.
+ """
+ st = self._eip_status
+ is_restart = st and st.is_restart
+
+ def reconnect():
+ self.qtsigs.disconnecting_signal.connect(self._stop_eip)
+
+ if is_restart:
+ QtDelayedCall(0, reconnect)
+ else:
+ self._eip_status.eip_pre_up()
+ self.user_stopped_eip = False
+ self._eip_status.hide_fw_down_button()
+
+ # Until we set an option in the preferences window, we'll assume that
+ # by default we try to autostart. If we switch it off manually, it
+ # won't try the next time.
+ self._settings.set_autostart_eip(True)
+ self._eip_status.is_restart = False
+
+ # DO the backend call!
+ self._backend.eip_start(restart=is_restart)
+
+ def reconnect_stop_signal(self):
+ """
+ Restore the original behaviour associated with the disconnecting
+ signal, this is, trigger a normal stop, and not a restart one.
+ """
+
+ def do_stop(*args):
+ self._stop_eip(restart=False)
+
+ self.qtsigs.disconnecting_signal.disconnect()
+ self.qtsigs.disconnecting_signal.connect(do_stop)
+
+ @QtCore.Slot()
+ def _stop_eip(self, restart=False, failed=False):
+ """
+ TRIGGERS:
+ self.qsigs.do_disconnect_signal (via state machine)
+
+ Stops vpn process and makes gui adjustments to reflect
+ the change of state.
+
+ :param restart: whether this is part of a eip restart.
+ :type restart: bool
+
+ :param failed: whether this is the final step of a retry sequence
+ :type failed: bool
+ """
+ self._eip_status.is_restart = restart
+ self.user_stopped_eip = not restart and not failed
+
+ def on_disconnected_do_restart():
+ # hard restarts
+ logger.debug("HARD RESTART")
+ eip_status_label = self._eip_status.tr("{0} is restarting")
+ eip_status_label = eip_status_label.format(self.eip_name)
+ self._eip_status.eip_stopped(restart=True)
+ self._eip_status.set_eip_status(eip_status_label, error=False)
+
+ QtDelayedCall(2000, self.do_connect)
+
+ def plug_restart_on_disconnected():
+ self.qtsigs.disconnected_signal.connect(on_disconnected_do_restart)
+
+ def reconnect_disconnected_signal():
+ self.qtsigs.disconnected_signal.disconnect(
+ on_disconnected_do_restart)
+
+ def do_stop(*args):
+ self._stop_eip(restart=False)
+
+ if restart:
+ # we bypass the on_eip_disconnected here
+ plug_restart_on_disconnected()
+ self.qtsigs.disconnected_signal.emit()
+ #QtDelayedCall(0, self.qtsigs.disconnected_signal.emit)
+ # ...and reconnect the original signal again, after having used the
+ # diversion
+ QtDelayedCall(500, reconnect_disconnected_signal)
+
+ elif failed:
+ self.qtsigs.disconnected_signal.emit()
+
+ else:
+ logger.debug('Setting autostart to: False')
+ self._settings.set_autostart_eip(False)
+
+ # Call to the backend.
+ self._backend.eip_stop(restart=restart)
+
+ # ... and inform the status widget
+ self._eip_status.set_eipstatus_off(False)
+ self._eip_status.eip_stopped(restart=restart, failed=failed)
+
+ self._already_started_eip = False
+
+ # XXX needed?
+ if restart:
+ QtDelayedCall(2000, self.reconnect_stop_signal)
+
+ @QtCore.Slot()
+ def _do_eip_restart(self):
+ """
+ TRIGGERS:
+ self._eip_connection.qtsigs.process_restart
+
+ Restart the connection.
+ """
+ if self._eip_status is not None:
+ self._eip_status.is_restart = True
+
+ def do_stop(*args):
+ self._stop_eip(restart=True)
+
+ try:
+ self.qtsigs.disconnecting_signal.disconnect()
+ except Exception:
+ logger.error("cannot disconnect signals")
+
+ self.qtsigs.disconnecting_signal.connect(do_stop)
+ self.qtsigs.do_disconnect_signal.emit()
+
+ @QtCore.Slot()
+ def _do_eip_failed(self):
+ """
+ Stop EIP after a failure to start.
+
+ TRIGGERS
+ signaler.eip_process_restart_tls
+ """
+ logger.debug("TLS Error: eip_stop (failed)")
+ self.qtsigs.connection_died_signal.emit()
+ QtDelayedCall(1000, self._eip_status.eip_failed_to_connect)
+
+ @QtCore.Slot(int)
+ def _eip_finished(self, exitCode):
+ """
+ TRIGGERS:
+ Signaler.eip_process_finished
+
+ Triggered when the EIP/VPN process finishes to set the UI
+ accordingly.
+
+ Ideally we would have the right exit code here,
+ but the use of different wrappers (pkexec, cocoasudo) swallows
+ the openvpn exit code so we get zero exit in some cases where we
+ shouldn't. As a workaround we just use a flag to indicate
+ a purposeful switch off, and mark everything else as unexpected.
+
+ :param exitCode: the exit code of the eip process.
+ :type exitCode: int
+ """
+ # TODO Add error catching to the openvpn log observer
+ # so we can have a more precise idea of which type
+ # of error did we have (server side, local problem, etc)
+
+ logger.info("VPN process finished with exitCode %s..."
+ % (exitCode,))
+
+ signal = self.qtsigs.disconnected_signal
+
+ # XXX check if these exitCodes are pkexec/cocoasudo specific
+ if exitCode in (126, 127):
+ eip_status_label = self._eip_status.tr(
+ "{0} could not be launched "
+ "because you did not authenticate properly.")
+ eip_status_label = eip_status_label.format(self.eip_name)
+ self._eip_status.set_eip_status(eip_status_label, error=True)
+ signal = self.qtsigs.connection_aborted_signal
+ self._backend.eip_terminate()
+
+ # XXX FIXME --- check exitcode is != 0 really.
+ # bitmask-root is masking the exitcode, so we might need
+ # to fix it on that side.
+ #if exitCode != 0 and not self.user_stopped_eip:
+ if not self.user_stopped_eip:
+ eip_status_label = self._eip_status.tr(
+ "{0} finished in an unexpected manner!")
+ eip_status_label = eip_status_label.format(self.eip_name)
+ self._eip_status.eip_stopped()
+ self._eip_status.set_eip_status_icon("error")
+ self._eip_status.set_eip_status(eip_status_label,
+ error=True)
+ signal = self.qtsigs.connection_died_signal
+ self._eip_status.show_fw_down_button()
+ self._eip_status.eip_failed_to_connect()
+
+ if exitCode == 0 and IS_MAC:
+ # XXX remove this warning after I fix cocoasudo.
+ logger.warning("The above exit code MIGHT BE WRONG.")
+
+ # We emit signals to trigger transitions in the state machine:
+ signal.emit()