public function getFrameOptions()
{
$isChecksum = false;
while (!$isChecksum) {
$idOption = hexdec($this->buffer->getUint16LE());
$nameOption = Option::$optionIds[$idOption];
$sizeOption = $this->buffer->getUint16LE();
if ($nameOption === 'checksum') {
$isChecksum = true;
$expectedChecksum = 0;
$checksum = $this->buffer->getUint32LE();
$data = $this->buffer->getData();
for ($i = 0; $i < $this->buffer->getLength() - $sizeOption; ++$i) {
$expectedChecksum = $expectedChecksum + hexdec(bin2hex($data[$i]));
}
$expectedChecksum = dechex($expectedChecksum);
if ($checksum !== $expectedChecksum) {
throw new \Exception('Invalid checksum');
}
}
$option = new Option($idOption, $this->buffer);
$this->options[$option->getName()] = $option;
}
}
