flow_print(FILE *stream,
           const struct flow *flow, const struct ofputil_port_map *port_map)
{
    char *s = flow_to_string(flow, port_map);
    fputs(s, stream);
    free(s);
}
flow_print(FILE *stream,
           const struct flow *flow, const struct ofputil_port_map *port_map)
{
    char *s = flow_to_string(flow, port_map);
    fputs(s, stream);
    free(s);
}