Add logging and safety checks in boot and VPN service

https://github.com/2dust/v2rayNG/issues/5346

V2rayNG/app/src/main/java/com/v2ray/ang/receiver/BootReceiver.kt

@@ -3,6 +3,8 @@ package com.v2ray.ang.receiver
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
+import android.util.Log
+import com.v2ray.ang.AppConfig
 import com.v2ray.ang.handler.MmkvManager
 import com.v2ray.ang.handler.V2RayServiceManager
 
@@ -16,8 +18,24 @@ class BootReceiver : BroadcastReceiver() {
      * @param intent The Intent being received.
      */
     override fun onReceive(context: Context?, intent: Intent?) {
-        if (context == null || intent?.action != Intent.ACTION_BOOT_COMPLETED) return
-        if (!MmkvManager.decodeStartOnBoot() || MmkvManager.getSelectServer().isNullOrEmpty()) return
+        Log.i(AppConfig.TAG, "BootReceiver received: ${intent?.action}")
+
+        if (context == null || intent?.action != Intent.ACTION_BOOT_COMPLETED) {
+            Log.w(AppConfig.TAG, "BootReceiver: Invalid context or action")
+            return
+        }
+
+        if (!MmkvManager.decodeStartOnBoot()) {
+            Log.i(AppConfig.TAG, "BootReceiver: Auto-start on boot is disabled")
+            return
+        }
+
+        if (MmkvManager.getSelectServer().isNullOrEmpty()) {
+            Log.w(AppConfig.TAG, "BootReceiver: No server selected")
+            return
+        }
+
+        Log.i(AppConfig.TAG, "BootReceiver: Starting V2Ray service")
         V2RayServiceManager.startVService(context)
     }
 }

V2rayNG/app/src/main/java/com/v2ray/ang/service/V2RayVpnService.kt

@@ -1,5 +1,6 @@
 package com.v2ray.ang.service
 
+import android.annotation.SuppressLint
 import android.app.Service
 import android.content.Context
 import android.content.Intent
@@ -28,6 +29,7 @@ import com.v2ray.ang.util.MyContextWrapper
 import com.v2ray.ang.util.Utils
 import java.lang.ref.SoftReference
 
+@SuppressLint("VpnServicePolicy")
 class V2RayVpnService : VpnService(), ServiceControl {
     private lateinit var mInterface: ParcelFileDescriptor
     private var isRunning = false
@@ -103,7 +105,7 @@ class V2RayVpnService : VpnService(), ServiceControl {
     }
 
     override fun startService() {
-        if (mInterface == null) {
+        if (!::mInterface.isInitialized) {
             Log.e(AppConfig.TAG, "Failed to create VPN interface")
             return
         }
@@ -136,7 +138,7 @@ class V2RayVpnService : VpnService(), ServiceControl {
     private fun setupVpnService() {
         val prepare = prepare(this)
         if (prepare != null) {
-            Log.e(AppConfig.TAG, "VPN preparation failed")
+            Log.e(AppConfig.TAG, "VPN preparation failed - VPN permission not granted")
             stopSelf()
             return
         }
@@ -165,9 +167,11 @@ class V2RayVpnService : VpnService(), ServiceControl {
 
         // Close the old interface since the parameters have been changed
         try {
-            mInterface.close()
-        } catch (ignored: Exception) {
-            // ignored
+            if (::mInterface.isInitialized) {
+                mInterface.close()
+            }
+        } catch (e: Exception) {
+            Log.w(AppConfig.TAG, "Failed to close old interface", e)
         }
 
         // Configure platform-specific features
@@ -330,8 +334,8 @@ class V2RayVpnService : VpnService(), ServiceControl {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
             try {
                 connectivity.unregisterNetworkCallback(defaultNetworkCallback)
-            } catch (ignored: Exception) {
-                // ignored
+            } catch (e: Exception) {
+                Log.w(AppConfig.TAG, "Failed to unregister network callback", e)
             }
         }
 
@@ -349,7 +353,9 @@ class V2RayVpnService : VpnService(), ServiceControl {
             stopSelf()
 
             try {
-                mInterface.close()
+                if (::mInterface.isInitialized) {
+                    mInterface.close()
+                }
             } catch (e: Exception) {
                 Log.e(AppConfig.TAG, "Failed to close VPN interface", e)
             }