add function to get the numeric index to an interface name0.2.0

2 files changed, 18 insertions, 0 deletions

diff --git a/src/blocking.rs b/src/blocking.rs
index 587dd1b..8483452 100644
--- a/src/blocking.rs
+++ b/src/blocking.rs
@@ -56,6 +56,7 @@ pub mod link {
     blockify!(wait_up, link::wait_up, link: String);
     blockify!(exists -> bool, link::exists, link: String);
     blockify!(wait_exists, link::wait_exists, link: String);
+    blockify!(index -> u32, link::index, link: String);
 }
 
 #[cfg(feature = "route")]
diff --git a/src/link.rs b/src/link.rs
index 209b8a6..ffbaa99 100644
--- a/src/link.rs
+++ b/src/link.rs
@@ -147,3 +147,20 @@ pub async fn wait_exists(link: String) -> Result<()> {
 
     Ok(())
 }
+
+/// Returns the index of an interface.
+pub async fn index(link: String) -> Result<u32> {
+    let (conn, handle, _) = rtnetlink::new_connection()?;
+    tokio::spawn(conn);
+
+    let link = handle
+        .link()
+        .get()
+        .match_name(link.clone())
+        .execute()
+        .try_next()
+        .await?
+        .ok_or(Error::LinkNotFound(link))?;
+
+    Ok(link.header.index)
+}