Add fix for CM9 /dev/tun ownership (closes issue #35)

res/values/strings.xml

@@ -125,7 +125,7 @@
     <string name="custom_options_title">Custom Options</string>
     <string name="edit_vpn">Edit VPN Settings</string>
     <string name="remove_vpn_query">Remove the VPN Profile %s?</string>
-    <string name="tun_error_helpful">" On some custom ICS images the permission on /dev/tun might be wrong, or the tun module might be missing completly"</string>
+    <string name="tun_error_helpful">" On some custom ICS images the permission on /dev/tun might be wrong, or the tun module might be missing completly. For CM9 images try the fix ownership option under general settings"</string>
     <string name="tun_open_error">Opening tun interface failed badly.</string>
     <string name="error">"Error: "</string>
     <string name="clear">Clear</string>
@@ -194,10 +194,13 @@
     <string name="converted_profile">imported profile</string>
     <string name="converted_profile_i">imported profile %d</string>
     <string name="broken_images">Broken Images</string>
-    <string name="broken_images_faq">&lt;p>Offical HTC images are known to have a strange routing problem causing traffic not to flow through the tunnel (See also &lt;a href=\"http://code.google.com/p/ics-openvpn/issues/detail?id=18\">Issue 18&lt;/a> in the bug tracker.)&lt;/p>&lt;p>The offical SONY images from Xperia arc S and Xperia Ray have been reported to be missing the VPNService completly from the image. Other Sony images may be affected as well. (See also &lt;a href=\"http://code.google.com/p/ics-openvpn/issues/detail?id=29\">Issue 29&lt;/a> in the bug tracker.)&lt;/p>&lt;p>On custom build images the tun module might be missing or the rights of /dev/tun might be wrong. On the experimental CM9 Defy image a &lt;i>chown system /dev/tun&lt;/i> is needed to make the VPNService API work.&lt;/p></string>
+    <string name="broken_images_faq">&lt;p>Offical HTC images are known to have a strange routing problem causing traffic not to flow through the tunnel (See also &lt;a href=\"http://code.google.com/p/ics-openvpn/issues/detail?id=18\">Issue 18&lt;/a> in the bug tracker.)&lt;/p>&lt;p>The offical SONY images from Xperia arc S and Xperia Ray have been reported to be missing the VPNService completly from the image. Other Sony images may be affected as well. (See also &lt;a href=\"http://code.google.com/p/ics-openvpn/issues/detail?id=29\">Issue 29&lt;/a> in the bug tracker.)&lt;/p>&lt;p>On custom build images the tun module might be missing or the rights of /dev/tun might be wrong. Some CM9 images need the fix ownership option under general settings.&lt;/p></string>
     <string name="error_empty_username">The username must not be empty.</string>
     <string name="pkcs12_file_encryption_key">PKCS12 File Encryption Key</string>
     <string name="private_key_password">Private Key Password</string>
     <string name="password">Password</string>
+    <string name="generalsettings">General Settings</string>
+    <string name="owner_fix_summary">Tries to set the owner of /dev/tun to system. Some CM9 images need this to make the VPNService API work. Requires root.</string>
+    <string name="owner_fix">Fix owner of /dev/tun</string>
 
 </resources>

res/xml/main_headers.xml

@@ -5,14 +5,9 @@
         android:fragment="de.blinkt.openvpn.VPNProfileList"
         android:summary="@string/vpn_list_summary"
         android:title="@string/vpn_list_title" />
-
-    <!--
-            <header
-
+    <header
         android:fragment="de.blinkt.openvpn.GeneralSettings"
         android:title="@string/generalsettings" />
-    -->
-
     <header
         android:fragment="de.blinkt.openvpn.FaqFragment"
         android:summary="@string/faq_summary"

src/de/blinkt/openvpn/GeneralSettings.java

@@ -0,0 +1,17 @@
+package de.blinkt.openvpn;
+import android.os.Bundle;
+import android.preference.PreferenceFragment;
+
+public class GeneralSettings extends PreferenceFragment {
+
+		@Override
+		public void onCreate(Bundle savedInstanceState) {
+			super.onCreate(savedInstanceState);
+			
+
+			// Load the preferences from an XML resource
+			addPreferencesFromResource(R.xml.general_settings);
+		}
+
+	
+	}

src/de/blinkt/openvpn/LaunchVPN.java

@@ -30,9 +30,11 @@ import android.content.ActivityNotFoundException;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.net.VpnService;
 import android.os.Bundle;
 import android.os.Parcelable;
+import android.preference.PreferenceManager;
 import android.text.InputType;
 import android.text.method.PasswordTransformationMethod;
 import android.view.View;
@@ -76,7 +78,9 @@ public class LaunchVPN extends ListActivity implements OnItemClickListener {
 
 	private ProfileManager mPM;
 	private VpnProfile mSelectedProfile;
-
+	
+	
+	private boolean mCmfixed=false;
 	static boolean minivpnwritten=false;
 	
 	@Override
@@ -326,6 +330,25 @@ public class LaunchVPN extends ListActivity implements OnItemClickListener {
 		}
 
 		Intent intent = VpnService.prepare(this);
+		// Check if we want to fix /dev/tun
+		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);        
+		boolean usecm9fix = prefs.getBoolean("useCM9Fix", false);
+		
+		if(usecm9fix && !mCmfixed ) {
+			ProcessBuilder pb = new ProcessBuilder(new String[] {"su","-c","chown system /dev/tun"});
+			try {
+				Process p = pb.start();
+				int ret = p.waitFor();
+				if(ret ==0)
+					mCmfixed=true;
+			} catch (InterruptedException e) {
+				e.printStackTrace();
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		}
+			
+		
 
 		if (intent != null) {
 			// Start the query