From 954f6ed1a17f9193dd000534e404f9bbf2946264 Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Fri, 2 Jun 2023 12:28:15 +0200
Subject: [PATCH] Special case for VPN kill switch

---
 .../java/eu/faircode/email/ConnectionHelper.java    | 13 +++++++++++++
 app/src/main/java/eu/faircode/email/Helper.java     |  4 ++++
 2 files changed, 17 insertions(+)

diff --git a/app/src/main/java/eu/faircode/email/ConnectionHelper.java b/app/src/main/java/eu/faircode/email/ConnectionHelper.java
index bcf104ab68..0a86675981 100644
--- a/app/src/main/java/eu/faircode/email/ConnectionHelper.java
+++ b/app/src/main/java/eu/faircode/email/ConnectionHelper.java
@@ -274,6 +274,19 @@ public class ConnectionHelper {
 
         Network active = cm.getActiveNetwork();
         if (active == null) {
+            // Special case:
+            // - getActiveNetworkInfo: DISCONNECTED/BLOCKED (data saver / kill switch?)
+            // - getActiveNetwork: null
+            // - OS: GrapheneOS / IVPN
+            if (standalone_vpn)
+                for (Network network : cm.getAllNetworks()) {
+                    NetworkCapabilities caps = cm.getNetworkCapabilities(network);
+                    if (caps.hasTransport(NetworkCapabilities.TRANSPORT_VPN) &&
+                            caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) &&
+                            caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED))
+                        return !caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED);
+                }
+
             Log.i("isMetered: no active network");
             return null;
         }
diff --git a/app/src/main/java/eu/faircode/email/Helper.java b/app/src/main/java/eu/faircode/email/Helper.java
index ba5f10ea0d..7cceb60db0 100644
--- a/app/src/main/java/eu/faircode/email/Helper.java
+++ b/app/src/main/java/eu/faircode/email/Helper.java
@@ -1494,6 +1494,10 @@ public class Helper {
         return ("Microsoft".equalsIgnoreCase(Build.MANUFACTURER) && "Surface Duo 2".equals(Build.MODEL));
     }
 
+    static boolean isGrapheneOS() {
+        return "grapheneos".equalsIgnoreCase(Build.HOST);
+    }
+
     static boolean isArc() {
         // https://github.com/google/talkback/blob/master/utils/src/main/java/com/google/android/accessibility/utils/FeatureSupport.java
         return (Build.DEVICE != null) && Build.DEVICE.matches(".+_cheets|cheets_.+");