1 files changed, 90 insertions, 1 deletions
diff --git a/src/route.rs b/src/route.rs
index b3e7cc9..0e5cd5d 100644
--- a/src/route.rs
+++ b/src/route.rs
@@ -2,10 +2,99 @@ use crate::error::{Error, Result};
 
 use std::net::{Ipv4Addr, Ipv6Addr};
 
+use futures::future;
 use futures_util::TryStreamExt;
-use netlink_packet_route::rtnl::RT_SCOPE_LINK;
+use netlink_packet_route::{RouteMessage, RT_SCOPE_LINK};
+use rtnetlink::IpVersion;
 use tokio::runtime::Runtime;
 
+async fn do_flush4(link: String) -> Result<()> {
+    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 id = link.header.index;
+
+    let routes: Vec<RouteMessage> = handle
+        .route()
+        .get(IpVersion::V4)
+        .execute()
+        .try_filter(|route| {
+            future::ready(if let Some(ifi) = route.output_interface() {
+                ifi == id
+            } else {
+                false
+            })
+        })
+        .try_collect()
+        .await?;
+
+    for route in routes {
+        handle.route().del(route).execute().await?;
+    }
+
+    Ok(())
+}
+
+pub fn flush4(link: String) -> Result<()> {
+    Runtime::new()?.block_on(do_flush4(link))
+}
+
+async fn do_flush6(link: String) -> Result<()> {
+    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 id = link.header.index;
+
+    let routes: Vec<RouteMessage> = handle
+        .route()
+        .get(IpVersion::V6)
+        .execute()
+        .try_filter(|route| {
+            future::ready(if let Some(ifi) = route.output_interface() {
+                ifi == id
+            } else {
+                false
+            })
+        })
+        .try_collect()
+        .await?;
+
+    for route in routes {
+        handle.route().del(route).execute().await?;
+    }
+
+    Ok(())
+}
+
+pub fn flush6(link: String) -> Result<()> {
+    Runtime::new()?.block_on(do_flush6(link))
+}
+
+pub fn flush(link: String) -> Result<()> {
+    flush4(link.clone())?;
+    flush6(link)?;
+
+    Ok(())
+}
+
 async fn do_add4(dst: Ipv4Addr, prefix_len: u8, rtr: Option<Ipv4Addr>, link: String) -> Result<()> {
     let (conn, handle, _) = rtnetlink::new_connection()?;
     tokio::spawn(conn);