system: add get; rename

easytier/src/dns/system/mod.rs

@@ -1,3 +1,5 @@
+use crate::utils::BoxExt;
+
 #[cfg(target_os = "linux")]
 pub mod linux;
 
@@ -5,16 +7,36 @@ pub mod linux;
 pub mod windows;
 
 #[cfg(all(target_os = "macos", not(feature = "macos-ne")))]
-pub mod darwin;
+pub mod macos;
 
 #[derive(Default, Debug)]
-pub struct OSConfig {
+pub struct SystemConfig {
     pub nameservers: Vec<String>,
     pub search_domains: Vec<String>,
     pub match_domains: Vec<String>,
 }
 
-pub trait SystemConfigurator: Send + Sync + Clone {
-    fn set_dns(&self, cfg: &OSConfig) -> std::io::Result<()>;
+pub trait SystemConfigurator: Send + Sync {
+    fn set_dns(&self, cfg: &SystemConfig) -> std::io::Result<()>;
     fn clean(&self) -> std::io::Result<()>;
 }
+
+// TODO: move this to nic mod
+fn get(
+    #[allow(unused_variables)] interface: &str,
+) -> Result<Option<Box<dyn SystemConfigurator>>, anyhow::Error> {
+    #[cfg(target_os = "windows")]
+    {
+        use crate::dns::system::windows::WindowsDNSManager;
+        return Ok(Some(WindowsDNSManager::new(interface)?.boxed()));
+    }
+
+    #[cfg(all(target_os = "macos", not(feature = "macos-ne")))]
+    {
+        use crate::dns::system_config::darwin::DarwinConfigurator;
+        return Ok(Some(DarwinConfigurator::new().boxed()));
+    }
+
+    #[allow(unreachable_code)]
+    Ok(None)
+}