From 6f2da25a159ad2624bc7627d0e840e5c73f00424 Mon Sep 17 00:00:00 2001
From: itachichrist <77534932+itachicoders@users.noreply.github.com>
Date: Thu, 9 Apr 2026 21:34:16 +0300
Subject: [PATCH] Enhance VPN interface validation logic

---
 .../main/java/org/fptn/vpn/services/vpn/FptnConnection.java   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/org/fptn/vpn/services/vpn/FptnConnection.java b/app/src/main/java/org/fptn/vpn/services/vpn/FptnConnection.java
index e7c86319..17597c66 100644
--- a/app/src/main/java/org/fptn/vpn/services/vpn/FptnConnection.java
+++ b/app/src/main/java/org/fptn/vpn/services/vpn/FptnConnection.java
@@ -360,7 +360,9 @@ private void sendConnectionStateToService(ConnectionState connectionState) {
     }
 
     private boolean isTunInterfaceValid(ParcelFileDescriptor vpnInterface) {
-        return vpnInterface.getFileDescriptor() != null;
+        return vpnInterface != null 
+            && vpnInterface.getFileDescriptor() != null 
+            && vpnInterface.getFileDescriptor().valid();
     }
 
     private String getTag() {