var tv Timeval
	err := ioctlPtr(fd, BIOCGRTIMEOUT, unsafe.Pointer(&tv))
	if err != nil {
		return nil, err
	}
	return &tv, nil
}

// Deprecated: Use golang.org/x/net/bpf instead.
func SetBpfTimeout(fd int, tv *Timeval) error {
	err := ioctlPtr(fd, BIOCSRTIMEOUT, unsafe.Pointer(tv))
	if err != nil {
		return err
	}
	return nil
}

// Deprecated: Use golang.org/x/net/bpf instead.