Allow the user to specify their own socket

This is useful when dealing with multiple network/user namespaces.

Requires rust-netlink/netlink-proto#25

src/connection.rs

@@ -33,3 +33,17 @@ where
         netlink_proto::new_connection_with_socket(NETLINK_ROUTE)?;
     Ok((conn, Handle::new(handle), messages))
 }
+
+#[allow(clippy::type_complexity)]
+pub fn from_socket<S>(socket: S) -> (
+    Connection<RouteNetlinkMessage, S>,
+    Handle,
+    UnboundedReceiver<(NetlinkMessage<RouteNetlinkMessage>, SocketAddr)>,
+)
+where
+    S: AsyncSocket,
+{
+    let (conn, handle, messages) =
+        netlink_proto::from_socket_with_codec(socket);
+    (conn, Handle::new(handle), messages)
+}

src/lib.rs

@@ -32,6 +32,7 @@ pub use crate::addr::{
 #[cfg(feature = "tokio_socket")]
 pub use crate::connection::new_connection;
 pub use crate::connection::new_connection_with_socket;
+pub use crate::connection::from_socket;
 pub use crate::errors::Error;
 pub use crate::handle::Handle;
 pub use crate::link::{