code: func getNetworkInfo(ip string) (*nodeInfo, error) {
  	iface, mask, err := interfaceByIP(ip)
  	if err != nil {
  		return nil, err
  	}
  	return &nodeInfo{
  		iface:   iface,
  		ip:      ip,
  		netmask: mask,
  	}, nil
  }
docs: // getNetworkInfo returns information of the node where the pod is running