+interface_handle_subnet_route(struct interface *iface, struct device_addr *addr, bool add)
+{
+ struct device *dev = iface->l3_dev.dev;
+ struct device_route route;
+
+ route.iface = iface;
+ route.flags = addr->flags;
+ route.mask = addr->mask;
+ memcpy(&route.addr, &addr->addr, sizeof(route.addr));
+ clear_if_addr(&route.addr, route.mask);
+
+ if (add) {
+ route.flags |= DEVADDR_KERNEL;
+ system_del_route(dev, &route);
+
+ route.flags &= ~DEVADDR_KERNEL;
+ route.metric = iface->metric;
+ system_add_route(dev, &route);
+ } else {
+ system_del_route(dev, &route);
+ }
+}
+
+static void