Improved has46

app/src/main/java/eu/faircode/email/ConnectionHelper.java

@@ -23,6 +23,7 @@ import android.accounts.AccountsException;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.net.ConnectivityManager;
+import android.net.LinkAddress;
 import android.net.LinkProperties;
 import android.net.Network;
 import android.net.NetworkCapabilities;
@@ -651,7 +652,19 @@ public class ConnectionHelper {
                 ConnectivityManager cm = Helper.getSystemService(context, ConnectivityManager.class);
                 Network active = (cm == null ? null : cm.getActiveNetwork());
                 LinkProperties props = (active == null ? null : cm.getLinkProperties(active));
-                ifacename = (props == null ? null : props.getInterfaceName());
+                List<LinkAddress> las = (props == null ? null : props.getLinkAddresses());
+                if (las != null)
+                    for (LinkAddress la : las) {
+                        InetAddress addr = la.getAddress();
+                        boolean local = (addr.isLoopbackAddress() || addr.isLinkLocalAddress());
+                        if (local)
+                            continue;
+                        if (addr instanceof Inet4Address)
+                            has4 = true;
+                        else if (addr instanceof Inet6Address)
+                            has6 = true;
+                    }
+                return new boolean[]{has4, has6};
             } catch (Throwable ex) {
                 Log.e(ex);
             }