+/**
+ * \brief Generic method: find a route between hosts
+ *
+ * \param src the source host name
+ * \param dst the destination host name
+ *
+ * same as get_route, but return NULL if any exception is raised.
+ */
+static xbt_dynar_t get_route_or_null(const char *src, const char *dst)
+{
+ xbt_dynar_t route = NULL;
+ xbt_ex_t exception;
+ TRY {
+ get_route_latency(src, dst, &route, NULL, 1);
+ }CATCH(exception) {
+ return NULL;
+ }
+ return route;
+}
+