Add ignorenetworkstate restriction, to allow tunnel over USB (#1746)

* Add ignorenetworkstate restriction, to allow tunnel over USB

* Add to app_restrictions.xml

* Parse restriction value into SharedPreferences


Co-authored-by: Eliyahu Stern <estern@digital.ai>

Author: EliyahuSternDAI

main/src/main/java/de/blinkt/openvpn/api/AppRestrictions.java

@@ -14,7 +14,6 @@
 
 import de.blinkt.openvpn.VpnProfile;
 import de.blinkt.openvpn.core.ConfigParser;
-import de.blinkt.openvpn.core.OpenVPNService;
 import de.blinkt.openvpn.core.Preferences;
 import de.blinkt.openvpn.core.ProfileManager;
 import de.blinkt.openvpn.core.VpnStatus;
@@ -147,6 +146,13 @@ private static void setMiscSettings(Context c, Bundle restrictions) {
             editor.putBoolean("screenoff", pauseVPN);
             editor.apply();
         }
+        if(restrictions.containsKey("ignorenetworkstate"))
+        {
+            boolean ignoreNetworkState = restrictions.getBoolean("ignorenetworkstate");
+            SharedPreferences.Editor editor = defaultPrefs.edit();
+            editor.putBoolean("ignorenetstate", ignoreNetworkState);
+            editor.apply();
+        }
         if (restrictions.containsKey("restartvpnonboot"))
         {
             boolean restartVPNonBoot = restrictions.getBoolean("restartvpnonboot");

main/src/main/java/de/blinkt/openvpn/core/DeviceStateReceiver.java

@@ -14,14 +14,11 @@
 import android.net.NetworkInfo.State;
 import android.os.Handler;
 import android.os.Looper;
-import android.preference.PreferenceManager;
 
 import de.blinkt.openvpn.R;
 import de.blinkt.openvpn.core.VpnStatus.ByteCountListener;
 
 import java.util.LinkedList;
-import java.util.Objects;
-import java.util.StringTokenizer;
 
 import static de.blinkt.openvpn.core.OpenVPNManagement.pauseReason;
 
@@ -38,7 +35,6 @@ public class DeviceStateReceiver extends BroadcastReceiver implements ByteCountL
     // Time to wait after network disconnect to pause the VPN
     private final int DISCONNECT_WAIT = 20;
 
-
     connectState network = connectState.DISCONNECTED;
     connectState screen = connectState.SHOULDBECONNECTED;
     connectState userpause = connectState.SHOULDBECONNECTED;
@@ -179,12 +175,16 @@ public static boolean equalsObj(Object a, Object b) {
         return (a == null) ? (b == null) : a.equals(b);
     }
 
-
     public void networkStateChange(Context context) {
-        NetworkInfo networkInfo = getCurrentNetworkInfo(context);
         SharedPreferences prefs = Preferences.getDefaultSharedPreferences(context);
-        boolean sendusr1 = prefs.getBoolean("netchangereconnect", true);
+        boolean ignoreNetworkState = prefs.getBoolean("ignorenetstate", false);
+        if (ignoreNetworkState) {
+            network = connectState.SHOULDBECONNECTED;
+            return;
+        }
 
+        NetworkInfo networkInfo = getCurrentNetworkInfo(context);
+        boolean sendusr1 = prefs.getBoolean("netchangereconnect", true);
 
         String netstatestring;
         if (networkInfo == null) {

main/src/main/res/values/untranslatable.xml

@@ -86,6 +86,7 @@
     <string name="import_from_URL">URL</string>
     <string name="restriction_pausevpn">Pause VPN when screen is off and less than 64 kB transferred data in 60s</string>
     <string name="restriction_restartvpnonboot">Enable the workaround to use an on boot receiver to start the VPN if the Always On VPN functionality is not available</string>
+    <string name="restriction_ignorenetworkstate">Keep the VPN connected even when no network is detected, e.g. when reverse tethering over USB using adb</string>
     <string name="apprest_aidl_list">List of apps that are allowed to use the remote AIDL. If this list is in the restrictions, the app will not allowed any changes to the list by the user. Package names of allowed apps separated by comma, space or newlines</string>
     <string name="apprest_remoteaidl">Remote API access</string>
 

main/src/main/res/xml/app_restrictions.xml

@@ -76,6 +76,10 @@
             android:key="restartvpnonboot"
             android:restrictionType="bool"
             android:title="@string/restriction_restartvpnonboot" />
+    <restriction
+            android:key="ignorenetworkstate"
+            android:restrictionType="bool"
+            android:title="@string/restriction_ignorenetworkstate" />
 
     <restriction
             android:description="@string/apprest_aidl_list"