Fix sniffing (#5173)

* Fix sniffing

* Fix custom config

V2rayNG/app/src/main/assets/v2ray_config_with_tun.json

@@ -42,6 +42,13 @@
       "name": "xray0",
       "MTU": 1500,
       "userLevel": 8
+    },
+    "sniffing": {
+      "enabled": true,
+      "destOverride": [
+        "http",
+        "tls"
+      ]
     }
   }
 ],

V2rayNG/app/src/main/java/com/v2ray/ang/dto/V2rayConfig.kt

@@ -34,7 +34,7 @@ data class V2rayConfig(
         var protocol: String,
         var listen: String? = null,
         var settings: InSettingsBean? = null,
-        val sniffing: SniffingBean? = null,
+        var sniffing: SniffingBean? = null,
         val streamSettings: Any? = null,
         val allocate: Any? = null
     ) {

V2rayNG/app/src/main/java/com/v2ray/ang/handler/V2rayConfigManager.kt

@@ -398,6 +398,7 @@ object V2rayConfigManager {
             if (!SettingsManager.isUsingHevTun()) {
                 val inboundTun = v2rayConfig.inbounds.firstOrNull { e -> e.tag == "tun" }
                 inboundTun?.settings?.mtu = SettingsManager.getVpnMtu()
+                inboundTun?.sniffing = inbound1.sniffing
             }
         } catch (e: Exception) {
             Log.e(AppConfig.TAG, "Failed to configure inbounds", e)