From 53056ee3f1e1ad07495880ac9f02ed5755ff258f Mon Sep 17 00:00:00 2001
From: Kali Kaneko <kali@leap.se>
Date: Sat, 27 Jul 2013 01:05:16 +0900
Subject: add kext check

---
 src/leap/services/eip/vpnlaunchers.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/leap/services/eip')

diff --git a/src/leap/services/eip/vpnlaunchers.py b/src/leap/services/eip/vpnlaunchers.py
index 81d9b43b..8522d1df 100644
--- a/src/leap/services/eip/vpnlaunchers.py
+++ b/src/leap/services/eip/vpnlaunchers.py
@@ -58,6 +58,10 @@ class EIPNoPkexecAvailable(VPNLauncherException):
     pass
 
 
+class EIPNoTunKextLoaded(VPNLauncherException):
+    pass
+
+
 class VPNLauncher:
     """
     Abstract launcher class
@@ -520,6 +524,13 @@ class DarwinVPNLauncher(VPNLauncher):
             to, frompath, to, to)
         return cmd
 
+    @classmethod
+    def maybe_kextloaded(kls):
+        """
+        Checks if the needed kext is loaded before launching openvpn.
+        """
+        return bool(commands.getoutput('kextstat | grep "leap.tun"'))
+
     def _get_resource_path(self):
         """
         Returns the absolute path to the app resources directory
@@ -600,6 +611,9 @@ class DarwinVPNLauncher(VPNLauncher):
         leap_assert(socket_host, "We need a socket host!")
         leap_assert(socket_port, "We need a socket port!")
 
+        if not self.maybe_kextloaded():
+            raise EIPNoTunKextLoaded
+
         kwargs = {}
         if ProviderConfig.standalone:
             kwargs['path_extension'] = os.path.join(
-- 
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