func: static OfDpaFlow *of_dpa_flow_alloc(uint64_t cookie)
  
  {
  
      OfDpaFlow *flow;
  
      int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) / 1000;
  
  
  
      flow = g_new0(OfDpaFlow, 1);
  
      if (!flow) {
  
          return NULL;
  
      }
  
  
  
      flow->cookie = cookie;
  
      flow->mask.tbl_id = 0xffffffff;
  
  
  
      flow->stats.install_time = flow->stats.refresh_time = now;
  
  
  
      return flow;
  
  }
  