Add basic structure for netlink route socket

kernel/src/net/socket/netlink/route/unbound.rs

@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: MPL-2.0
+
+use super::bound::BoundNetlinkRoute;
+use crate::{
+    events::IoEvents,
+    net::socket::netlink::{
+        table::NETLINK_SOCKET_TABLE, NetlinkSocketAddr, StandardNetlinkProtocol,
+    },
+    prelude::*,
+};
+
+pub(super) struct UnboundNetlinkRoute {
+    _private: (),
+}
+
+impl UnboundNetlinkRoute {
+    pub(super) const fn new() -> Self {
+        Self { _private: () }
+    }
+
+    pub(super) fn bind(
+        self,
+        addr: &NetlinkSocketAddr,
+    ) -> core::result::Result<BoundNetlinkRoute, (Error, Self)> {
+        let bound_handle = NETLINK_SOCKET_TABLE
+            .bind(StandardNetlinkProtocol::ROUTE as _, addr)
+            .map_err(|err| (err, self))?;
+
+        Ok(BoundNetlinkRoute::new(bound_handle))
+    }
+
+    pub(super) fn check_io_events(&self) -> IoEvents {
+        IoEvents::OUT
+    }
+}