-XBT_PUBLIC void sg_host_route(sg_host_t from, sg_host_t to, xbt_dynar_t links);
-XBT_PUBLIC double sg_host_route_latency(sg_host_t from, sg_host_t to);
-XBT_PUBLIC double sg_host_route_bandwidth(sg_host_t from, sg_host_t to);
-XBT_PUBLIC void sg_host_dump(sg_host_t ws);
+XBT_PUBLIC void sg_host_route(const_sg_host_t from, const_sg_host_t to, xbt_dynar_t links);
+XBT_PUBLIC double sg_host_route_latency(const_sg_host_t from, const_sg_host_t to);
+XBT_PUBLIC double sg_host_route_bandwidth(const_sg_host_t from, const_sg_host_t to);
+void sg_host_send_to(sg_host_t from, sg_host_t to, double byte_amount);
+
+XBT_PUBLIC void sg_host_dump(const_sg_host_t ws);