fix: clippy errors with stable toolchain and default features (#1553)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

easytier/src/instance/dns_server/server_instance.rs

@@ -492,16 +492,18 @@ impl MagicDnsServerInstance {
         let mut dns_server = Server::new(dns_config);
         dns_server.run().await?;
 
-        if !tun_inet.contains(&fake_ip) && tun_dev.is_some() {
-            let cost = if cfg!(target_os = "windows") {
-                Some(4)
-            } else {
-                None
-            };
-            let ifcfg = IfConfiger {};
-            ifcfg
-                .add_ipv4_route(tun_dev.as_ref().unwrap(), fake_ip, 32, cost)
-                .await?;
+        if !tun_inet.contains(&fake_ip) {
+            if let Some(tun_dev_name) = &tun_dev {
+                let cost = if cfg!(target_os = "windows") {
+                    Some(4)
+                } else {
+                    None
+                };
+                let ifcfg = IfConfiger {};
+                ifcfg
+                    .add_ipv4_route(tun_dev_name, fake_ip, 32, cost)
+                    .await?;
+            }
         }
 
         let data = Arc::new(MagicDnsServerInstanceData {
@@ -544,13 +546,14 @@ impl MagicDnsServerInstance {
             if let Err(e) = ret {
                 tracing::error!("Failed to close system config: {:?}", e);
             }
-        }
-
-        if !self.tun_inet.contains(&self.data.fake_ip) && self.data.tun_dev.is_some() {
-            let ifcfg = IfConfiger {};
-            let _ = ifcfg
-                .remove_ipv4_route(self.data.tun_dev.as_ref().unwrap(), self.data.fake_ip, 32)
-                .await;
+            if !self.tun_inet.contains(&self.data.fake_ip) {
+                if let Some(tun_dev_name) = &self.data.tun_dev {
+                    let ifcfg = IfConfiger {};
+                    let _ = ifcfg
+                        .remove_ipv4_route(tun_dev_name, self.data.fake_ip, 32)
+                        .await;
+                }
+            }
         }
 
         let _ = self

easytier/src/instance/dns_server/system_config/darwin.rs

@@ -12,8 +12,8 @@ const MAC_RESOLVER_FILE_HEADER: &str = "# Added by easytier\n";
 const ETC_RESOLVER: &str = "/etc/resolver";
 const ETC_RESOLV_CONF: &str = "/etc/resolv.conf";
 
+#[derive(Default)]
 pub struct DarwinConfigurator {}
-
 impl DarwinConfigurator {
     pub fn new() -> Self {
         DarwinConfigurator {}

easytier/src/instance/dns_server/tests.rs

@@ -102,7 +102,7 @@ async fn test_magic_dns_server_instance() {
             .await
             .unwrap();
 
-    let routes = vec![
+    let routes = [
         Route {
             hostname: "test1".to_string(),
             ipv4_addr: Some(Ipv4Inet::from_str("8.8.8.8/24").unwrap().into()),