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from __future__ import print_function
import logging
import time
#import sys
from PyQt4 import QtCore
from leap.baseapp.dialogs import ErrorDialog
from leap.baseapp import constants
from leap.eip import exceptions as eip_exceptions
from leap.eip.eipconnection import EIPConnection
logger = logging.getLogger(name=__name__)
class EIPConductorAppMixin(object):
"""
initializes an instance of EIPConnection,
gathers errors, and passes status-change signals
from Qt land along to the conductor.
Connects the eip connect/disconnect logic
to the switches in the app (buttons/menu items).
"""
def __init__(self, *args, **kwargs):
opts = kwargs.pop('opts')
config_file = getattr(opts, 'config_file', None)
self.eip_service_started = False
# conductor (eip connection) is in charge of all
# vpn-related configuration / monitoring.
# we pass a tuple of signals that will be
# triggered when status changes.
self.conductor = EIPConnection(
watcher_cb=self.newLogLine.emit,
config_file=config_file,
checker_signals=(self.changeLeapStatus.emit, ),
status_signals=(self.statusChange.emit, ),
debug=self.debugmode,
ovpn_verbosity=opts.openvpn_verb)
self.skip_download = opts.no_provider_checks
self.skip_verify = opts.no_ca_verify
def run_eip_checks(self):
"""
runs eip checks and
the error checking loop
"""
logger.debug('running EIP CHECKS')
self.conductor.run_checks(
skip_download=self.skip_download,
skip_verify=self.skip_verify)
self.error_check()
self.start_eipconnection.emit()
def error_check(self):
"""
consumes the conductor error queue.
pops errors, and acts accordingly (launching user dialogs).
"""
logger.debug('error check')
errq = self.conductor.error_queue
while errq.qsize() != 0:
logger.debug('%s errors left in conductor queue', errq.qsize())
# we get exception and original traceback from queue
error, tb = errq.get()
# redundant log, debugging the loop.
logger.error('%s: %s', error.__class__.__name__, error.message)
if issubclass(error.__class__, eip_exceptions.EIPClientError):
self.triggerEIPError.emit(error)
else:
# deprecated form of raising exception.
raise error, None, tb
if error.failfirst is True:
break
@QtCore.pyqtSlot(object)
def onEIPError(self, error):
"""
check severity and launches
dialogs informing user about the errors.
in the future we plan to derive errors to
our log viewer.
"""
if getattr(error, 'usermessage', None):
message = error.usermessage
else:
message = error.message
# XXX
# check headless = False before
# launching dialog.
# (so Qt tests can assert stuff)
if error.critical:
logger.critical(error.message)
#critical error (non recoverable),
#we give user some info and quit.
#(critical error dialog will exit app)
ErrorDialog(errtype="critical",
msg=message,
label="critical error")
elif error.warning:
logger.warning(error.message)
else:
dialog = ErrorDialog()
dialog.warningMessage(message, 'error')
@QtCore.pyqtSlot()
def statusUpdate(self):
"""
polls status and updates ui with real time
info about transferred bytes / connection state.
right now is triggered by a timer tick
(timer controlled by StatusAwareTrayIcon class)
"""
# TODO I guess it's too expensive to poll
# continously. move to signal events instead.
# (i.e., subscribe to connection status changes
# from openvpn manager)
if not self.eip_service_started:
# there is a race condition
# going on here. Depending on how long we take
# to init the qt app, the management socket
# is not ready yet.
return
if self.conductor.with_errors:
#XXX how to wait on pkexec???
#something better that this workaround, plz!!
#I removed the pkexec pass authentication at all.
#time.sleep(5)
#logger.debug('timeout')
logger.error('errors. disconnect')
self.start_or_stopVPN() # is stop
state = self.conductor.poll_connection_state()
if not state:
return
ts, con_status, ok, ip, remote = state
self.set_statusbarMessage(con_status)
self.setIconToolTip()
ts = time.strftime("%a %b %d %X", ts)
if self.debugmode:
self.updateTS.setText(ts)
self.status_label.setText(con_status)
self.ip_label.setText(ip)
self.remote_label.setText(remote)
# status i/o
status = self.conductor.get_status_io()
if status and self.debugmode:
#XXX move this to systray menu indicators
ts, (tun_read, tun_write, tcp_read, tcp_write, auth_read) = status
ts = time.strftime("%a %b %d %X", ts)
self.updateTS.setText(ts)
self.tun_read_bytes.setText(tun_read)
self.tun_write_bytes.setText(tun_write)
@QtCore.pyqtSlot()
def start_or_stopVPN(self):
"""
stub for running child process with vpn
"""
if self.conductor.has_errors():
logger.debug('not starting vpn; conductor has errors')
if self.eip_service_started is False:
try:
self.conductor.connect()
except eip_exceptions.EIPNoCommandError as exc:
self.triggerEIPError.emit(exc)
except Exception as err:
# raise generic exception (Bad Thing Happened?)
logger.exception(err)
else:
# no errors, so go on.
if self.debugmode:
self.startStopButton.setText('&Disconnect')
self.eip_service_started = True
self.toggleEIPAct()
# XXX decouple! (timer is init by icons class).
# we could bring Timer Init to this Mixin
# or to its own Mixin.
self.timer.start(constants.TIMER_MILLISECONDS)
self.network_checker.start()
return
if self.eip_service_started is True:
self.network_checker.stop()
self.conductor.disconnect()
if self.debugmode:
self.startStopButton.setText('&Connect')
self.eip_service_started = False
self.toggleEIPAct()
self.timer.stop()
return
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