Merge pull request #24 from Beepbop0/Beepbop0/check_opening_tun

Check that opening /dev/net/tun is ok
yaa110 · Apr 7, 2024 · 8892239 · 8892239
2 parents aef5a67 + 2a4df76
commit 8892239
Showing 1 changed file with 8 additions and 3 deletions.
diff --git a/src/tun.rs b/src/tun.rs
@@ -146,12 +146,17 @@ impl Tun {
     fn allocate(params: Params, queues: usize) -> Result<Interface> {
         let fds = (0..queues)
             .map(|_| unsafe {
-                libc::open(
+                let fd = libc::open(
                     TUN.as_ptr().cast::<c_char>(),
                     libc::O_RDWR | libc::O_NONBLOCK,
-                )
+                );
+                if fd < 0 {
+                    Err(std::io::Error::last_os_error().into())
+                } else {
+                    Ok(fd)
+                }
             })
-            .collect::<Vec<_>>();
+            .collect::<Result<Vec<_>>>()?;
 
         let iface = Interface::new(
             fds,