Implement TunInterfaceOptions

tun/src/options.rs

@@ -0,0 +1,38 @@
+use fehler::throws;
+use std::io::Error;
+
+use super::TunInterface;
+
+#[derive(Default)]
+pub struct TunInterfaceOptions {
+    /// (Windows + Linux) Name the tun interface.
+    pub(crate) name: Option<String>,
+    /// (Linux) Don't include packet information.
+    pub(crate) no_pi: Option<()>,
+    /// (Linux) Avoid opening an existing persistant device.
+    pub(crate) tun_excl: Option<()>,
+}
+
+impl TunInterfaceOptions {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn name(mut self, name: &str) -> Self {
+        self.name = Some(name.to_owned());
+        self
+    }
+
+    pub fn no_pi(mut self, enable: bool) {
+        self.no_pi = enable.then_some(());
+    }
+
+    pub fn tun_excl(mut self, enable: bool) {
+        self.tun_excl = enable.then_some(());
+    }
+
+    #[throws]
+    pub fn open(self) -> TunInterface {
+        TunInterface::new_with_options(self)?
+    }
+}