add is_up api

1 files changed, 22 insertions, 0 deletions

diff --git a/src/link.rs b/src/link.rs
index 8810a35..b14d7fd 100644
--- a/src/link.rs
+++ b/src/link.rs
@@ -1,6 +1,7 @@
 use crate::error::{Error, Result};
 
 use futures_util::TryStreamExt;
+use netlink_packet_route::rtnl::IFF_UP;
 use tokio::runtime::Runtime;
 
 #[derive(Clone, Copy, Debug)]
@@ -41,3 +42,24 @@ pub fn up(link: String) -> Result<()> {
 pub fn down(link: String) -> Result<()> {
     Runtime::new()?.block_on(set(link, State::Down))
 }
+
+async fn do_is_up(link: String) -> Result<bool> {
+    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))?;
+
+    let is_up = link.header.flags & IFF_UP == IFF_UP;
+    Ok(is_up)
+}
+
+pub fn is_up(link: String) -> Result<bool> {
+    Runtime::new()?.block_on(do_is_up(link))
+}