Add setup command to TunInterface

tun/Cargo.toml

@@ -14,6 +14,7 @@ tracing = "0.1"
 log = "0.4"
 serde = { version = "1", features = ["derive"], optional = true }
 schemars = { version = "0.8", optional = true }
+rtnetlink = "0.14"
 
 futures = { version = "0.3.28", optional = true }
 

tun/src/tokio/mod.rs

@@ -1,6 +1,6 @@
 use std::io;
 
-use tokio::io::unix::AsyncFd;
+use tokio::io::unix::{AsyncFd, TryIoError};
 use tracing::instrument;
 
 #[derive(Debug)]
@@ -15,6 +15,13 @@ impl TunInterface {
         Ok(Self { inner: AsyncFd::new(tun)? })
     }
 
+    #[instrument]
+    pub async fn set_up(&self, up: bool) -> io::Result<()> {
+        let mut guard = self.inner.readable().await?;
+        guard.try_io(|inner| inner.get_ref().set_up(up));
+        Ok(())
+    }
+
     #[instrument]
     pub async fn send(&self, buf: &[u8]) -> io::Result<usize> {
         loop {

tun/src/unix/linux/mod.rs

@@ -11,6 +11,7 @@ use std::{
 
 use fehler::throws;
 use libc::in6_ifreq;
+use rtnetlink::new_connection;
 use socket2::{Domain, SockAddr, Socket, Type};
 use tracing::{info, instrument};
 
@@ -95,6 +96,15 @@ impl TunInterface {
         unsafe { iff.ifr_ifru.ifru_ifindex }
     }
 
+    #[throws]
+    #[instrument]
+    pub fn set_up(&self, up: bool) {
+        let connection = new_connection()?;
+        let handle = connection.1;
+        let link = handle.link().set(self.index()? as u32);
+        if up { link.up() } else { link.down() }
+    }
+
     #[throws]
     #[instrument]
     pub fn set_ipv4_addr(&self, addr: Ipv4Addr) {