summaryrefslogtreecommitdiff
path: root/src/leap/bitmask/vpn/process.py
diff options
context:
space:
mode:
Diffstat (limited to 'src/leap/bitmask/vpn/process.py')
-rw-r--r--src/leap/bitmask/vpn/process.py920
1 files changed, 920 insertions, 0 deletions
diff --git a/src/leap/bitmask/vpn/process.py b/src/leap/bitmask/vpn/process.py
new file mode 100644
index 0000000..05847e2
--- /dev/null
+++ b/src/leap/bitmask/vpn/process.py
@@ -0,0 +1,920 @@
+# -*- coding: utf-8 -*-
+# process.py
+# Copyright (C) 2013-2017 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/>.
+
+"""
+VPN Manager, spawned in a custom processProtocol.
+"""
+
+import os
+import shutil
+import socket
+import subprocess
+import sys
+
+from itertools import chain, repeat
+
+import psutil
+try:
+ # psutil < 2.0.0
+ from psutil.error import AccessDenied as psutil_AccessDenied
+ PSUTIL_2 = False
+except ImportError:
+ # psutil >= 2.0.0
+ from psutil import AccessDenied as psutil_AccessDenied
+ PSUTIL_2 = True
+
+from twisted.internet import defer, protocol, reactor
+from twisted.internet import error as internet_error
+from twisted.internet.task import LoopingCall
+from twisted.logger import Logger
+
+from leap.bitmask.vpn.constants import IS_MAC
+from leap.bitmask.vpn.utils import first, force_eval
+from leap.bitmask.vpn.utils import get_vpn_launcher
+from leap.bitmask.vpn.launchers import linux
+from leap.bitmask.vpn.udstelnet import UDSTelnet
+
+logger = Logger()
+
+
+# OpenVPN verbosity level - from flags.py
+OPENVPN_VERBOSITY = 1
+
+
+class VPNObserver(object):
+ """
+ A class containing different patterns in the openvpn output that
+ we can react upon.
+ """
+
+ # TODO this is i18n-sensitive, right?
+ # in that case, we should add the translations :/
+ # until we find something better.
+
+ _events = {
+ 'NETWORK_UNREACHABLE': (
+ 'Network is unreachable (code=101)',),
+ 'PROCESS_RESTART_TLS': (
+ "SIGTERM[soft,tls-error]",),
+ 'PROCESS_RESTART_PING': (
+ "SIGTERM[soft,ping-restart]",),
+ 'INITIALIZATION_COMPLETED': (
+ "Initialization Sequence Completed",),
+ }
+
+ def __init__(self, signaler=None):
+ self._signaler = signaler
+
+ def watch(self, line):
+ """
+ Inspects line searching for the different patterns. If a match
+ is found, try to emit the corresponding signal.
+
+ :param line: a line of openvpn output
+ :type line: str
+ """
+ chained_iter = chain(*[
+ zip(repeat(key, len(l)), l)
+ for key, l in self._events.iteritems()])
+ for event, pattern in chained_iter:
+ if pattern in line:
+ logger.debug('pattern matched! %s' % pattern)
+ break
+ else:
+ return
+
+ sig = self._get_signal(event)
+ if sig is not None:
+ if self._signaler is not None:
+ self._signaler.signal(sig)
+ return
+ else:
+ logger.debug('We got %s event from openvpn output but we could '
+ 'not find a matching signal for it.' % event)
+
+ def _get_signal(self, event):
+ """
+ Tries to get the matching signal from the eip signals
+ objects based on the name of the passed event (in lowercase)
+
+ :param event: the name of the event that we want to get a signal for
+ :type event: str
+ :returns: a Signaler signal or None
+ :rtype: str or None
+ """
+ if self._signaler is None:
+ return
+ sig = self._signaler
+ signals = {
+ "network_unreachable": sig.eip_network_unreachable,
+ "process_restart_tls": sig.eip_process_restart_tls,
+ "process_restart_ping": sig.eip_process_restart_ping,
+ "initialization_completed": sig.eip_connected
+ }
+ return signals.get(event.lower())
+
+
+class OpenVPNAlreadyRunning(Exception):
+ message = ("Another openvpn instance is already running, and could "
+ "not be stopped.")
+
+
+class AlienOpenVPNAlreadyRunning(Exception):
+ message = ("Another openvpn instance is already running, and could "
+ "not be stopped because it was not launched by LEAP.")
+
+
+class VPN(object):
+ """
+ This is the high-level object that the GUI is dealing with.
+ It exposes the start and terminate methods.
+
+ On start, it spawns a VPNProcess instance that will use a vpnlauncher
+ suited for the running platform and connect to the management interface
+ opened by the openvpn process, executing commands over that interface on
+ demand.
+ """
+ TERMINATE_MAXTRIES = 10
+ TERMINATE_WAIT = 1 # secs
+
+ OPENVPN_VERB = "openvpn_verb"
+
+ def __init__(self, **kwargs):
+ """
+ Instantiate empty attributes and get a copy
+ of a QObject containing the QSignals that we will pass along
+ to the VPNManager.
+ """
+ self._vpnproc = None
+ self._pollers = []
+
+ self._signaler = kwargs['signaler']
+ # self._openvpn_verb = flags.OPENVPN_VERBOSITY
+ self._openvpn_verb = None
+
+ self._user_stopped = False
+ self._remotes = kwargs['remotes']
+
+ def start(self, *args, **kwargs):
+ """
+ Starts the openvpn subprocess.
+
+ :param args: args to be passed to the VPNProcess
+ :type args: tuple
+
+ :param kwargs: kwargs to be passed to the VPNProcess
+ :type kwargs: dict
+ """
+ logger.debug('VPN: start')
+ self._user_stopped = False
+ self._stop_pollers()
+ kwargs['openvpn_verb'] = self._openvpn_verb
+ kwargs['signaler'] = self._signaler
+ kwargs['remotes'] = self._remotes
+
+ # start the main vpn subprocess
+ vpnproc = VPNProcess(*args, **kwargs)
+
+ if vpnproc.get_openvpn_process():
+ logger.info("Another vpn process is running. Will try to stop it.")
+ vpnproc.stop_if_already_running()
+
+ # FIXME it would be good to document where the
+ # errors here are catched, since we currently handle them
+ # at the frontend layer. This *should* move to be handled entirely
+ # in the backend.
+ # exception is indeed technically catched in backend, then converted
+ # into a signal, that is catched in the eip_status widget in the
+ # frontend, and converted into a signal to abort the connection that is
+ # sent to the backend again.
+
+ # the whole exception catching should be done in the backend, without
+ # the ping-pong to the frontend, and without adding any logical checks
+ # in the frontend. We should just communicate UI changes to frontend,
+ # and abstract us away from anything else.
+ try:
+ cmd = vpnproc.getCommand()
+ except Exception as e:
+ logger.error("Error while getting vpn command... {0!r}".format(e))
+ raise
+
+ env = os.environ
+ for key, val in vpnproc.vpn_env.items():
+ env[key] = val
+
+ reactor.spawnProcess(vpnproc, cmd[0], cmd, env)
+ self._vpnproc = vpnproc
+
+ # add pollers for status and state
+ # this could be extended to a collection of
+ # generic watchers
+
+ poll_list = [LoopingCall(vpnproc.pollStatus),
+ LoopingCall(vpnproc.pollState)]
+ self._pollers.extend(poll_list)
+ self._start_pollers()
+
+ def bitmask_root_vpn_down(self):
+ """
+ Bring openvpn down using the privileged wrapper.
+ """
+ if IS_MAC:
+ # We don't support Mac so far
+ return True
+ BM_ROOT = force_eval(linux.LinuxVPNLauncher.BITMASK_ROOT)
+
+ # FIXME -- port to processProtocol
+ exitCode = subprocess.call(["pkexec",
+ BM_ROOT, "openvpn", "stop"])
+ return True if exitCode is 0 else False
+
+ def _kill_if_left_alive(self, tries=0):
+ """
+ Check if the process is still alive, and send a
+ SIGKILL after a timeout period.
+
+ :param tries: counter of tries, used in recursion
+ :type tries: int
+ """
+ while tries < self.TERMINATE_MAXTRIES:
+ if self._vpnproc.transport.pid is None:
+ logger.debug("Process has been happily terminated.")
+ return
+ else:
+ logger.debug("Process did not die, waiting...")
+
+ tries += 1
+ reactor.callLater(self.TERMINATE_WAIT,
+ self._kill_if_left_alive, tries)
+ return
+
+ # after running out of patience, we try a killProcess
+ logger.debug("Process did not died. Sending a SIGKILL.")
+ try:
+ self.killit()
+ except OSError:
+ logger.error("Could not kill process!")
+
+ def killit(self):
+ """
+ Sends a kill signal to the process.
+ """
+ self._stop_pollers()
+ if self._vpnproc is None:
+ logger.debug("There's no vpn process running to kill.")
+ else:
+ self._vpnproc.aborted = True
+ self._vpnproc.killProcess()
+
+ def terminate(self, shutdown=False, restart=False):
+ """
+ Stops the openvpn subprocess.
+
+ Attempts to send a SIGTERM first, and after a timeout
+ it sends a SIGKILL.
+
+ :param shutdown: whether this is the final shutdown
+ :type shutdown: bool
+ :param restart: whether this stop is part of a hard restart.
+ :type restart: bool
+ """
+ self._stop_pollers()
+
+ # First we try to be polite and send a SIGTERM...
+ if self._vpnproc is not None:
+ # We assume that the only valid stops are initiated
+ # by an user action, not hard restarts
+ self._user_stopped = not restart
+ self._vpnproc.is_restart = restart
+
+ self._sentterm = True
+ self._vpnproc.terminate_openvpn(shutdown=shutdown)
+
+ # ...but we also trigger a countdown to be unpolite
+ # if strictly needed.
+ reactor.callLater(
+ self.TERMINATE_WAIT, self._kill_if_left_alive)
+ else:
+ logger.debug("VPN is not running.")
+
+ def _start_pollers(self):
+ """
+ Iterate through the registered observers
+ and start the looping call for them.
+ """
+ for poller in self._pollers:
+ poller.start(VPNManager.POLL_TIME)
+
+ def _stop_pollers(self):
+ """
+ Iterate through the registered observers
+ and stop the looping calls if they are running.
+ """
+ for poller in self._pollers:
+ if poller.running:
+ poller.stop()
+ self._pollers = []
+
+
+class VPNManager(object):
+ """
+ This is a mixin that we use in the VPNProcess class.
+ Here we get together all methods related with the openvpn management
+ interface.
+
+ A copy of a QObject containing signals as attributes is passed along
+ upon initialization, and we use that object to emit signals to qt-land.
+
+ For more info about management methods::
+
+ zcat `dpkg -L openvpn | grep management`
+ """
+
+ # Timers, in secs
+ # NOTE: We need to set a bigger poll time in OSX because it seems
+ # openvpn malfunctions when you ask it a lot of things in a short
+ # amount of time.
+ POLL_TIME = 2.5 if IS_MAC else 1.0
+ CONNECTION_RETRY_TIME = 1
+
+ def __init__(self, signaler=None):
+ """
+ Initializes the VPNManager.
+
+ :param signaler: Signaler object used to send notifications to the
+ backend
+ :type signaler: backend.Signaler
+ """
+ self._tn = None
+ self._signaler = signaler
+ self._aborted = False
+
+ @property
+ def aborted(self):
+ return self._aborted
+
+ @aborted.setter
+ def aborted(self, value):
+ self._aborted = value
+
+ def _seek_to_eof(self):
+ """
+ Read as much as available. Position seek pointer to end of stream
+ """
+ try:
+ self._tn.read_eager()
+ except EOFError:
+ logger.debug("Could not read from socket. Assuming it died.")
+ return
+
+ def _send_command(self, command, until=b"END"):
+ """
+ Sends a command to the telnet connection and reads until END
+ is reached.
+
+ :param command: command to send
+ :type command: str
+
+ :param until: byte delimiter string for reading command output
+ :type until: byte str
+
+ :return: response read
+ :rtype: list
+ """
+ # leap_assert(self._tn, "We need a tn connection!")
+
+ try:
+ self._tn.write("%s\n" % (command,))
+ buf = self._tn.read_until(until, 2)
+ self._seek_to_eof()
+ blist = buf.split('\r\n')
+ if blist[-1].startswith(until):
+ del blist[-1]
+ return blist
+ else:
+ return []
+
+ except socket.error:
+ # XXX should get a counter and repeat only
+ # after mod X times.
+ logger.warning('socket error (command was: "%s")' % (command,))
+ self._close_management_socket(announce=False)
+ logger.debug('trying to connect to management again')
+ self.try_to_connect_to_management(max_retries=5)
+ return []
+
+ # XXX should move this to a errBack!
+ except Exception as e:
+ logger.warning("Error sending command %s: %r" %
+ (command, e))
+ return []
+
+ def _close_management_socket(self, announce=True):
+ """
+ Close connection to openvpn management interface.
+ """
+ logger.debug('closing socket')
+ if announce:
+ self._tn.write("quit\n")
+ self._tn.read_all()
+ self._tn.get_socket().close()
+ self._tn = None
+
+ def _connect_management(self, socket_host, socket_port):
+ """
+ Connects to the management interface on the specified
+ socket_host socket_port.
+
+ :param socket_host: either socket path (unix) or socket IP
+ :type socket_host: str
+
+ :param socket_port: either string "unix" if it's a unix
+ socket, or port otherwise
+ :type socket_port: str
+ """
+ if self.is_connected():
+ self._close_management_socket()
+
+ try:
+ self._tn = UDSTelnet(socket_host, socket_port)
+
+ # XXX make password optional
+ # specially for win. we should generate
+ # the pass on the fly when invoking manager
+ # from conductor
+
+ # self.tn.read_until('ENTER PASSWORD:', 2)
+ # self.tn.write(self.password + '\n')
+ # self.tn.read_until('SUCCESS:', 2)
+ if self._tn:
+ self._tn.read_eager()
+
+ # XXX move this to the Errback
+ except Exception as e:
+ logger.warning("Could not connect to OpenVPN yet: %r" % (e,))
+ self._tn = None
+
+ def _connectCb(self, *args):
+ """
+ Callback for connection.
+
+ :param args: not used
+ """
+ if self._tn:
+ logger.info('Connected to management')
+ else:
+ logger.debug('Cannot connect to management...')
+
+ def _connectErr(self, failure):
+ """
+ Errorback for connection.
+
+ :param failure: Failure
+ """
+ logger.warning(failure)
+
+ def connect_to_management(self, host, port):
+ """
+ Connect to a management interface.
+
+ :param host: the host of the management interface
+ :type host: str
+
+ :param port: the port of the management interface
+ :type port: str
+
+ :returns: a deferred
+ """
+ self.connectd = defer.maybeDeferred(
+ self._connect_management, host, port)
+ self.connectd.addCallbacks(self._connectCb, self._connectErr)
+ return self.connectd
+
+ def is_connected(self):
+ """
+ Returns the status of the management interface.
+
+ :returns: True if connected, False otherwise
+ :rtype: bool
+ """
+ return True if self._tn else False
+
+ def try_to_connect_to_management(self, retry=0, max_retries=None):
+ """
+ Attempts to connect to a management interface, and retries
+ after CONNECTION_RETRY_TIME if not successful.
+
+ :param retry: number of the retry
+ :type retry: int
+ """
+ if max_retries and retry > max_retries:
+ logger.warning("Max retries reached while attempting to connect "
+ "to management. Aborting.")
+ self.aborted = True
+ return
+
+ # _alive flag is set in the VPNProcess class.
+ if not self._alive:
+ logger.debug('Tried to connect to management but process is '
+ 'not alive.')
+ return
+ logger.debug('trying to connect to management')
+ if not self.aborted and not self.is_connected():
+ self.connect_to_management(self._socket_host, self._socket_port)
+ reactor.callLater(
+ self.CONNECTION_RETRY_TIME,
+ self.try_to_connect_to_management, retry + 1)
+
+ def _parse_state_and_notify(self, output):
+ """
+ Parses the output of the state command and emits state_changed
+ signal when the state changes.
+
+ :param output: list of lines that the state command printed as
+ its output
+ :type output: list
+ """
+ for line in output:
+ stripped = line.strip()
+ if stripped == "END":
+ continue
+ parts = stripped.split(",")
+ if len(parts) < 5:
+ continue
+ ts, status_step, ok, ip, remote = parts
+
+ state = status_step
+ if state != self._last_state:
+ if self._signaler is not None:
+ self._signaler.signal(self._signaler.eip_state_changed, state)
+ self._last_state = state
+
+ def _parse_status_and_notify(self, output):
+ """
+ Parses the output of the status command and emits
+ status_changed signal when the status changes.
+
+ :param output: list of lines that the status command printed
+ as its output
+ :type output: list
+ """
+ tun_tap_read = ""
+ tun_tap_write = ""
+
+ for line in output:
+ stripped = line.strip()
+ if stripped.endswith("STATISTICS") or stripped == "END":
+ continue
+ parts = stripped.split(",")
+ if len(parts) < 2:
+ continue
+
+ text, value = parts
+ # text can be:
+ # "TUN/TAP read bytes"
+ # "TUN/TAP write bytes"
+ # "TCP/UDP read bytes"
+ # "TCP/UDP write bytes"
+ # "Auth read bytes"
+
+ if text == "TUN/TAP read bytes":
+ tun_tap_read = value # download
+ elif text == "TUN/TAP write bytes":
+ tun_tap_write = value # upload
+
+ status = (tun_tap_read, tun_tap_write)
+ if status != self._last_status:
+ if self._signaler is not None:
+ self._signaler.signal(self._signaler.eip_status_changed, status)
+ self._last_status = status
+
+ def get_state(self):
+ """
+ Notifies the gui of the output of the state command over
+ the openvpn management interface.
+ """
+ if self.is_connected():
+ return self._parse_state_and_notify(self._send_command("state"))
+
+ def get_status(self):
+ """
+ Notifies the gui of the output of the status command over
+ the openvpn management interface.
+ """
+ if self.is_connected():
+ return self._parse_status_and_notify(self._send_command("status"))
+
+ @property
+ def vpn_env(self):
+ """
+ Return a dict containing the vpn environment to be used.
+ """
+ return self._launcher.get_vpn_env()
+
+ def terminate_openvpn(self, shutdown=False):
+ """
+ Attempts to terminate openvpn by sending a SIGTERM.
+ """
+ if self.is_connected():
+ self._send_command("signal SIGTERM")
+ if shutdown:
+ self._cleanup_tempfiles()
+
+ def _cleanup_tempfiles(self):
+ """
+ Remove all temporal files we might have left behind.
+
+ Iif self.port is 'unix', we have created a temporal socket path that,
+ under normal circumstances, we should be able to delete.
+ """
+ if self._socket_port == "unix":
+ logger.debug('cleaning socket file temp folder')
+ tempfolder = first(os.path.split(self._socket_host))
+ if tempfolder and os.path.isdir(tempfolder):
+ try:
+ shutil.rmtree(tempfolder)
+ except OSError:
+ logger.error('could not delete tmpfolder %s' % tempfolder)
+
+ def get_openvpn_process(self):
+ """
+ Looks for openvpn instances running.
+
+ :rtype: process
+ """
+ openvpn_process = None
+ for p in psutil.process_iter():
+ try:
+ # XXX Not exact!
+ # Will give false positives.
+ # we should check that cmdline BEGINS
+ # with openvpn or with our wrapper
+ # (pkexec / osascript / whatever)
+
+ # This needs more work, see #3268, but for the moment
+ # we need to be able to filter out arguments in the form
+ # --openvpn-foo, since otherwise we are shooting ourselves
+ # in the feet.
+
+ if PSUTIL_2:
+ cmdline = p.cmdline()
+ else:
+ cmdline = p.cmdline
+ if any(map(lambda s: s.find(
+ "LEAPOPENVPN") != -1, cmdline)):
+ openvpn_process = p
+ break
+ except psutil_AccessDenied:
+ pass
+ return openvpn_process
+
+ def stop_if_already_running(self):
+ """
+ Checks if VPN is already running and tries to stop it.
+
+ Might raise OpenVPNAlreadyRunning.
+
+ :return: True if stopped, False otherwise
+
+ """
+ process = self.get_openvpn_process()
+ if not process:
+ logger.debug('Could not find openvpn process while '
+ 'trying to stop it.')
+ return
+
+ logger.debug("OpenVPN is already running, trying to stop it...")
+ cmdline = process.cmdline
+
+ manag_flag = "--management"
+ if isinstance(cmdline, list) and manag_flag in cmdline:
+ # we know that our invocation has this distinctive fragment, so
+ # we use this fingerprint to tell other invocations apart.
+ # this might break if we change the configuration path in the
+ # launchers
+ smellslikeleap = lambda s: "leap" in s and "providers" in s
+
+ if not any(map(smellslikeleap, cmdline)):
+ logger.debug("We cannot stop this instance since we do not "
+ "recognise it as a leap invocation.")
+ raise AlienOpenVPNAlreadyRunning
+
+ try:
+ index = cmdline.index(manag_flag)
+ host = cmdline[index + 1]
+ port = cmdline[index + 2]
+ logger.debug("Trying to connect to %s:%s"
+ % (host, port))
+ self.connect_to_management(host, port)
+
+ # XXX this has a problem with connections to different
+ # remotes. So the reconnection will only work when we are
+ # terminating instances left running for the same provider.
+ # If we are killing an openvpn instance configured for another
+ # provider, we will get:
+ # TLS Error: local/remote TLS keys are out of sync
+ # However, that should be a rare case right now.
+ self._send_command("signal SIGTERM")
+ self._close_management_socket(announce=True)
+ except (Exception, AssertionError) as e:
+ logger.warning("Problem trying to terminate OpenVPN: %r"
+ % (e,))
+ else:
+ logger.debug("Could not find the expected openvpn command line.")
+
+ process = self.get_openvpn_process()
+ if process is None:
+ logger.debug("Successfully finished already running "
+ "openvpn process.")
+ return True
+ else:
+ logger.warning("Unable to terminate OpenVPN")
+ raise OpenVPNAlreadyRunning
+
+
+class VPNProcess(protocol.ProcessProtocol, VPNManager):
+ """
+ A ProcessProtocol class that can be used to spawn a process that will
+ launch openvpn and connect to its management interface to control it
+ programmatically.
+ """
+
+ def __init__(self, eipconfig, providerconfig, socket_host, socket_port,
+ signaler, openvpn_verb, remotes):
+ """
+ :param eipconfig: eip configuration object
+ :type eipconfig: EIPConfig
+
+ :param providerconfig: provider specific configuration
+ :type providerconfig: ProviderConfig
+
+ :param socket_host: either socket path (unix) or socket IP
+ :type socket_host: str
+
+ :param socket_port: either string "unix" if it's a unix
+ socket, or port otherwise
+ :type socket_port: str
+
+ :param signaler: Signaler object used to receive notifications to the
+ backend
+ :type signaler: backend.Signaler
+
+ :param openvpn_verb: the desired level of verbosity in the
+ openvpn invocation
+ :type openvpn_verb: int
+ """
+ VPNManager.__init__(self, signaler=signaler)
+ # leap_assert(not self.isRunning(), "Starting process more than once!")
+
+ self._eipconfig = eipconfig
+ self._providerconfig = providerconfig
+ self._socket_host = socket_host
+ self._socket_port = socket_port
+
+ self._launcher = get_vpn_launcher()
+
+ self._last_state = None
+ self._last_status = None
+ self._alive = False
+
+ # XXX use flags, maybe, instead of passing
+ # the parameter around.
+ self._openvpn_verb = openvpn_verb
+
+ self._vpn_observer = VPNObserver(signaler)
+ self.is_restart = False
+
+ self._remotes = remotes
+
+ # processProtocol methods
+
+ def connectionMade(self):
+ """
+ Called when the connection is made.
+
+ .. seeAlso: `http://twistedmatrix.com/documents/13.0.0/api/twisted.internet.protocol.ProcessProtocol.html` # noqa
+ """
+ self._alive = True
+ self.aborted = False
+ self.try_to_connect_to_management(max_retries=10)
+
+ def outReceived(self, data):
+ """
+ Called when new data is available on stdout.
+
+ :param data: the data read on stdout
+
+ .. seeAlso: `http://twistedmatrix.com/documents/13.0.0/api/twisted.internet.protocol.ProcessProtocol.html` # noqa
+ """
+ # truncate the newline
+ line = data[:-1]
+ logger.info(line)
+ self._vpn_observer.watch(line)
+
+ def processExited(self, reason):
+ """
+ Called when the child process exits.
+
+ .. seeAlso: `http://twistedmatrix.com/documents/13.0.0/api/twisted.internet.protocol.ProcessProtocol.html` # noqa
+ """
+ exit_code = reason.value.exitCode
+ if isinstance(exit_code, int):
+ logger.debug("processExited, status %d" % (exit_code,))
+ if self._signaler is not None:
+ self._signaler.signal(
+ self._signaler.eip_process_finished, exit_code)
+ self._alive = False
+
+ def processEnded(self, reason):
+ """
+ Called when the child process exits and all file descriptors associated
+ with it have been closed.
+
+ .. seeAlso: `http://twistedmatrix.com/documents/13.0.0/api/twisted.internet.protocol.ProcessProtocol.html` # noqa
+ """
+ exit_code = reason.value.exitCode
+ if isinstance(exit_code, int):
+ logger.debug("processEnded, status %d" % (exit_code,))
+
+ # polling
+
+ def pollStatus(self):
+ """
+ Polls connection status.
+ """
+ if self._alive:
+ self.get_status()
+
+ def pollState(self):
+ """
+ Polls connection state.
+ """
+ if self._alive:
+ self.get_state()
+
+ # launcher
+
+ def getCommand(self):
+ """
+ Gets the vpn command from the aproppriate launcher.
+
+ Might throw:
+ VPNLauncherException,
+ OpenVPNNotFoundException.
+
+ :rtype: list of str
+ """
+ print self._remotes
+ command = self._launcher.get_vpn_command(
+ eipconfig=self._eipconfig,
+ providerconfig=self._providerconfig,
+ socket_host=self._socket_host,
+ socket_port=self._socket_port,
+ openvpn_verb=self._openvpn_verb,
+ remotes=self._remotes)
+
+ encoding = sys.getfilesystemencoding()
+ for i, c in enumerate(command):
+ if not isinstance(c, str):
+ command[i] = c.encode(encoding)
+
+ logger.debug("Running VPN with command: ")
+ logger.debug("{0}".format(" ".join(command)))
+ return command
+
+ def getGateways(self):
+ """
+ Get the gateways from the appropiate launcher.
+
+ :rtype: list
+ """
+ gateways_ports = self._launcher.get_gateways(
+ self._eipconfig, self._providerconfig)
+
+ # filter out ports since we don't need that info
+ return [gateway for gateway, port in gateways_ports]
+
+ # shutdown
+
+ def killProcess(self):
+ """
+ Sends the KILL signal to the running process.
+ """
+ try:
+ self.transport.signalProcess('KILL')
+ except internet_error.ProcessExitedAlready:
+ logger.debug('Process Exited Already')