From 399b80dbc2a48806fe54fa4d84d513dc83269c3d Mon Sep 17 00:00:00 2001
From: Kali Kaneko <kali@leap.se>
Date: Tue, 2 Apr 2013 23:58:34 +0900
Subject: add osx initializer

---
 src/leap/platform_init/initializers.py | 55 ++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/src/leap/platform_init/initializers.py b/src/leap/platform_init/initializers.py
index ac08e23f..6392a3c5 100644
--- a/src/leap/platform_init/initializers.py
+++ b/src/leap/platform_init/initializers.py
@@ -30,6 +30,10 @@ logger = logging.getLogger(__name__)
 
 
 def init_platform():
+    """
+    Returns the right initializer for the platform we are running in, or
+    None if no proper initializer is found
+    """
     initializer = None
     try:
         initializer = globals()[platform.system() + "Initializer"]
@@ -43,6 +47,10 @@ def init_platform():
 
 
 def _windows_has_tap_device():
+    """
+    Loops over the windows registry trying to find if the tap0901 tap driver
+    has been installed on this machine.
+    """
     import _winreg as reg
 
     adapter_key = 'SYSTEM\CurrentControlSet\Control\Class' \
@@ -65,6 +73,10 @@ def _windows_has_tap_device():
 
 
 def WindowsInitializer():
+    """
+    Raises a dialog in case that the windows tap driver has not been found
+    in the registry, asking the user for permission to install the driver
+    """
     if not _windows_has_tap_device():
         msg = QtGui.QMessageBox()
         msg.setWindowTitle(msg.tr("TAP Driver"))
@@ -94,3 +106,46 @@ def WindowsInitializer():
             else:
                 logger.error("Tried to install TAP driver, but the installer "
                              "is not found or not executable")
+
+
+def _darwin_has_tun_kext():
+    """
+    Returns True only if we found a directory under the system kext folder
+    containing a kext named tun.kext, AND we found a startup item named 'tun'
+    """
+    # XXX we should be smarter here and use kextstats output.
+    has_kext = lambda: os.path.isdir("/System/Library/Extensions/tun.kext")
+    has_startup = lambda: os.path.isdir("/System/Library/StartupItems/tun")
+    return has_kext() and has_startup()
+
+def DarwinInitializer():
+    """
+    Raises a dialog in case that the osx tuntap driver has not been found
+    in the registry, asking the user for permission to install the driver
+    """
+    if not _darwin_has_tun_kext():
+        msg = QtGui.QMessageBox()
+        msg.setWindowTitle(msg.tr("TUN Driver"))
+        msg.setText(msg.tr("LEAPClient needs to install the necessary drivers "
+                           "for Encrypted Internet to work. Would you like to "
+                           "proceed?"))
+        msg.setInformativeText(msg.tr("Encrypted Internet uses VPN, which "
+                                      "needs a kernel extension for a TUN "
+                                      "device installed and none "
+                                      "has been found"))
+        msg.setStandardButtons(QtGui.QMessageBox.Yes | QtGui.QMessageBox.No)
+        msg.setDefaultButton(QtGui.QMessageBox.Yes)
+        ret = msg.exec_()
+
+        if ret == QtGui.QMessageBox.Yes:
+            installer_path = os.path.join(os.getcwd(),
+                                       "..",
+                                       "Resources",
+                                       "tuntap-installer.app")
+            if os.path.isfile(installer_path) and \
+                    os.access(installer_path, os.X_OK):
+                cmd = ["open", installer_path]
+                ret = subprocess.call(cmd, stdout=subprocess.PIPE, shell=True)
+            else:
+                logger.error("Tried to install tuntaposx kext, but the installer "
+                             "is not found inside this bundle, or it is not executable")
-- 
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