allow proxy packets to be forwarded by system kernel

easytier/src/common/config.rs

@@ -20,6 +20,7 @@ pub fn gen_default_flags() -> Flags {
         mtu: 1380,
         latency_first: false,
         enable_exit_node: false,
+        proxy_forward_by_system: false,
         no_tun: false,
         use_smoltcp: false,
         relay_network_whitelist: "*".to_string(),

easytier/src/common/global_ctx.rs

@@ -68,6 +68,7 @@ pub struct GlobalCtx {
     running_listeners: Mutex<Vec<url::Url>>,
 
     enable_exit_node: bool,
+    proxy_forward_by_system: bool,
     no_tun: bool,
 
     feature_flags: AtomicCell<PeerFeatureFlag>,
@@ -99,6 +100,7 @@ impl GlobalCtx {
         let stun_info_collection = Arc::new(StunInfoCollector::new_with_default_servers());
 
         let enable_exit_node = config_fs.get_flags().enable_exit_node;
+        let proxy_forward_by_system = config_fs.get_flags().proxy_forward_by_system;
         let no_tun = config_fs.get_flags().no_tun;
 
         let mut feature_flags = PeerFeatureFlag::default();
@@ -125,6 +127,7 @@ impl GlobalCtx {
             running_listeners: Mutex::new(Vec::new()),
 
             enable_exit_node,
+            proxy_forward_by_system,
             no_tun,
 
             feature_flags: AtomicCell::new(feature_flags),
@@ -273,6 +276,10 @@ impl GlobalCtx {
         self.enable_exit_node
     }
 
+    pub fn proxy_forward_by_system(&self) -> bool {
+        self.proxy_forward_by_system
+    }
+
     pub fn no_tun(&self) -> bool {
         self.no_tun
     }