diff options
Diffstat (limited to 'src/leap/bitmask/services/eip/vpnprocess.py')
| -rw-r--r-- | src/leap/bitmask/services/eip/vpnprocess.py | 88 |
1 files changed, 61 insertions, 27 deletions
diff --git a/src/leap/bitmask/services/eip/vpnprocess.py b/src/leap/bitmask/services/eip/vpnprocess.py index 1559ea8b..f56d464e 100644 --- a/src/leap/bitmask/services/eip/vpnprocess.py +++ b/src/leap/bitmask/services/eip/vpnprocess.py @@ -17,6 +17,7 @@ """ VPN Manager, spawned in a custom processProtocol. """ +import commands import logging import os import shutil @@ -30,9 +31,11 @@ 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 leap.bitmask.config import flags from leap.bitmask.config.providerconfig import ProviderConfig @@ -67,7 +70,7 @@ class VPNObserver(object): 'NETWORK_UNREACHABLE': ( 'Network is unreachable (code=101)',), 'PROCESS_RESTART_TLS': ( - "SIGUSR1[soft,tls-error]",), + "SIGTERM[soft,tls-error]",), 'PROCESS_RESTART_PING': ( "SIGTERM[soft,ping-restart]",), 'INITIALIZATION_COMPLETED': ( @@ -113,10 +116,12 @@ class VPNObserver(object): :returns: a Signaler signal or None :rtype: str or None """ + sig = self._signaler signals = { - "network_unreachable": self._signaler.EIP_NETWORK_UNREACHABLE, - "process_restart_tls": self._signaler.EIP_PROCESS_RESTART_TLS, - "process_restart_ping": self._signaler.EIP_PROCESS_RESTART_PING, + "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()) @@ -178,6 +183,8 @@ class VPN(object): kwargs['openvpn_verb'] = self._openvpn_verb kwargs['signaler'] = self._signaler + restart = kwargs.pop('restart', False) + # start the main vpn subprocess vpnproc = VPNProcess(*args, **kwargs) @@ -188,8 +195,9 @@ class VPN(object): # we try to bring the firewall up if IS_LINUX: gateways = vpnproc.getGateways() - firewall_up = self._launch_firewall(gateways) - if not firewall_up: + firewall_up = self._launch_firewall(gateways, + restart=restart) + if not restart and not firewall_up: logger.error("Could not bring firewall up, " "aborting openvpn launch.") return @@ -211,7 +219,7 @@ class VPN(object): self._pollers.extend(poll_list) self._start_pollers() - def _launch_firewall(self, gateways): + def _launch_firewall(self, gateways, restart=False): """ Launch the firewall using the privileged wrapper. @@ -226,11 +234,24 @@ class VPN(object): # XXX could check that the iptables rules are in place. BM_ROOT = linuxvpnlauncher.LinuxVPNLauncher.BITMASK_ROOT - exitCode = subprocess.call(["pkexec", - BM_ROOT, "firewall", "start"] + gateways) + cmd = ["pkexec", BM_ROOT, "firewall", "start"] + if restart: + cmd.append("restart") + exitCode = subprocess.call(cmd + gateways) return True if exitCode is 0 else False - def _tear_down_firewall(self): + def is_fw_down(self): + """ + Return whether the firewall is down or not. + + :rtype: bool + """ + BM_ROOT = linuxvpnlauncher.LinuxVPNLauncher.BITMASK_ROOT + fw_up_cmd = "pkexec {0} firewall isup".format(BM_ROOT) + fw_is_down = lambda: commands.getstatusoutput(fw_up_cmd)[0] == 256 + return fw_is_down() + + def tear_down_firewall(self): """ Tear the firewall down using the privileged wrapper. """ @@ -254,7 +275,7 @@ class VPN(object): # we try to tear the firewall down if IS_LINUX and self._user_stopped: - firewall_down = self._tear_down_firewall() + firewall_down = self.tear_down_firewall() if firewall_down: logger.debug("Firewall down") else: @@ -286,22 +307,28 @@ class VPN(object): self._vpnproc.aborted = True self._vpnproc.killProcess() - def terminate(self, shutdown=False): + 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 """ from twisted.internet import reactor self._stop_pollers() - # We assume that the only valid shutodowns are initiated - # by an user action. - self._user_stopped = shutdown - # First we try to be polite and send a SIGTERM... - if self._vpnproc: + 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) @@ -310,13 +337,12 @@ class VPN(object): reactor.callLater( self.TERMINATE_WAIT, self._kill_if_left_alive) - if shutdown: - if IS_LINUX and self._user_stopped: - firewall_down = self._tear_down_firewall() - if firewall_down: - logger.debug("Firewall down") - else: - logger.warning("Could not tear firewall down") + if IS_LINUX and self._user_stopped: + firewall_down = self.tear_down_firewall() + if firewall_down: + logger.debug("Firewall down") + else: + logger.warning("Could not tear firewall down") def _start_pollers(self): """ @@ -676,7 +702,13 @@ class VPNManager(object): # we need to be able to filter out arguments in the form # --openvpn-foo, since otherwise we are shooting ourselves # in the feet. - if any(map(lambda s: s.find("LEAPOPENVPN") != -1, p.cmdline)): + + 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: @@ -731,7 +763,7 @@ class VPNManager(object): # However, that should be a rare case right now. self._send_command("signal SIGTERM") self._close_management_socket(announce=True) - except Exception as e: + except (Exception, AssertionError) as e: logger.warning("Problem trying to terminate OpenVPN: %r" % (e,)) else: @@ -800,6 +832,7 @@ class VPNProcess(protocol.ProcessProtocol, VPNManager): self._openvpn_verb = openvpn_verb self._vpn_observer = VPNObserver(signaler) + self.is_restart = False # processProtocol methods @@ -835,7 +868,8 @@ class VPNProcess(protocol.ProcessProtocol, VPNManager): exit_code = reason.value.exitCode if isinstance(exit_code, int): logger.debug("processExited, status %d" % (exit_code,)) - self._signaler.signal(self._signaler.EIP_PROCESS_FINISHED, exit_code) + self._signaler.signal( + self._signaler.EIP_PROCESS_FINISHED, exit_code) self._alive = False def processEnded(self, reason): |