支持tap网卡,优化tun网卡配置

switch/rust-tun/src/lib.rs

@@ -11,7 +11,7 @@
 //   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 //
 //  0. You just DO WHAT THE FUCK YOU WANT TO.
-
+#![cfg(unix)]
 mod error;
 pub use crate::error::*;
 

switch/rust-tun/src/platform/posix/split.rs

@@ -112,6 +112,11 @@ impl AsRawFd for Reader {
         self.0.as_raw_fd()
     }
 }
+impl AsRawFd for Writer {
+    fn as_raw_fd(&self) -> RawFd {
+        self.0.as_raw_fd()
+    }
+}
 //
 // impl AsRawFd for Writer {
 //     fn as_raw_fd(&self) -> RawFd {