diff --git a/clash_lib/src/config/internal/config.rs b/clash_lib/src/config/internal/config.rs
index 5e159682d..770267ac0 100644
--- a/clash_lib/src/config/internal/config.rs
+++ b/clash_lib/src/config/internal/config.rs
@@ -254,6 +254,10 @@ pub struct TunConfig {
     /// default: 198.18.0.0/16
     pub network: Option<String>,
     pub gateway: Option<IpAddr>,
+    /// auto manage route
+    pub auto_route: Option<bool>,
+    /// fwmark for preveting loop
+    pub mark: Option<u32>,
 }
 
 #[derive(Clone, Default)]
diff --git a/clash_lib/src/proxy/tun/inbound.rs b/clash_lib/src/proxy/tun/inbound.rs
index 7e1a33393..a4dc3ed89 100644
--- a/clash_lib/src/proxy/tun/inbound.rs
+++ b/clash_lib/src/proxy/tun/inbound.rs
@@ -21,6 +21,7 @@ async fn handle_inbound_stream(
     remote_addr: SocketAddr,
     dispatcher: Arc<Dispatcher>,
 ) {
+    // TODO add fwmark here
     let sess = Session {
         network: Network::Tcp,
         typ: Type::Tun,
@@ -53,6 +54,7 @@ async fn handle_inbound_datagram(
     // and send back packets to this channel, which is to the tun
     let udp_stream = TunDatagram::new(l_tx, d_rx, local_addr);
 
+    // TODO add fwmark here
     let sess = Session {
         network: Network::Udp,
         typ: Type::Tun,