Export metric_to_kernel().

route.c

@@ -455,7 +455,7 @@ find_min_iroute(const unsigned char *dst_prefix, unsigned char dst_plen,
     return result;
 }
 
-static int
+int
 metric_to_kernel(int metric)
 {
     return metric < INFINITY ? kernel_metric : KERNEL_INFINITY;

route.h

@@ -87,6 +87,7 @@ void flush_interface_routes(struct interface *ifp, int v4only);
 struct route_stream *route_stream(int installed);
 struct babel_route *route_stream_next(struct route_stream *stream);
 void route_stream_done(struct route_stream *stream);
+int metric_to_kernel(int metric);
 void install_route(struct babel_route *route);
 void uninstall_route(struct babel_route *route);
 int route_feasible(struct babel_route *route);