xbt_lib_foreach(as_router_lib, cursor_dst, dst, value) //to router
{
if(routing_get_network_element_type(dst) == SURF_NETWORK_ELEMENT_ROUTER){
xbt_lib_foreach(as_router_lib, cursor_dst, dst, value) //to router
{
if(routing_get_network_element_type(dst) == SURF_NETWORK_ELEMENT_ROUTER){