code: func (i *Handle) doCmdWithoutAttr(cmd uint8) ([][]byte, error) {
  	req := newIPVSRequest(cmd)
  	req.Seq = atomic.AddUint32(&i.seq, 1)
  	return execute(i.sock, req, 0)
  }
docs: // doCmdWithoutAttr a simple wrapper of netlink socket execute command