129 lines
4.5 KiB
C++
129 lines
4.5 KiB
C++
#include "HeaderDeserializer.h"
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#include <fsfw/serialize/SerializeAdapter.h>
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#include <cstring>
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HeaderDeserializer::HeaderDeserializer(const uint8_t *pduBuf, size_t maxSize)
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: rawPtr(pduBuf), maxSize(maxSize) {}
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ReturnValue_t HeaderDeserializer::parseData() {
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if (maxSize < 7) {
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return SerializeIF::STREAM_TOO_SHORT;
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}
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return setData(const_cast<uint8_t *>(rawPtr), maxSize);
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}
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ReturnValue_t HeaderDeserializer::setData(uint8_t *dataPtr, size_t maxSize, void *args) {
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if (dataPtr == nullptr) {
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// Allowed for now
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this->fixedHeader = nullptr;
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return returnvalue::OK;
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}
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this->fixedHeader = reinterpret_cast<PduHeaderFixedStruct *>(const_cast<uint8_t *>(dataPtr));
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sourceIdRaw = static_cast<uint8_t *>(&fixedHeader->variableFieldsStart);
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cfdp::WidthInBytes widthEntityIds = getLenEntityIds();
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cfdp::WidthInBytes widthSeqNum = getLenSeqNum();
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seqNumRaw = static_cast<uint8_t *>(sourceIdRaw) + static_cast<uint8_t>(widthEntityIds);
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destIdRaw = static_cast<uint8_t *>(seqNumRaw) + static_cast<uint8_t>(widthSeqNum);
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this->maxSize = maxSize;
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return returnvalue::OK;
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}
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size_t HeaderDeserializer::getHeaderSize() const {
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if (fixedHeader != nullptr) {
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return getLenEntityIds() * 2 + getLenSeqNum() + 4;
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}
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return 0;
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}
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size_t HeaderDeserializer::getPduDataFieldLen() const {
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uint16_t pduFiedlLen = (fixedHeader->pduDataFieldLenH << 8) | fixedHeader->pduDataFieldLenL;
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return pduFiedlLen;
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}
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size_t HeaderDeserializer::getWholePduSize() const {
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return getPduDataFieldLen() + getHeaderSize();
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}
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cfdp::PduType HeaderDeserializer::getPduType() const {
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return static_cast<cfdp::PduType>((fixedHeader->firstByte >> 4) & 0x01);
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}
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cfdp::Direction HeaderDeserializer::getDirection() const {
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return static_cast<cfdp::Direction>((fixedHeader->firstByte >> 3) & 0x01);
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}
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cfdp::TransmissionModes HeaderDeserializer::getTransmissionMode() const {
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return static_cast<cfdp::TransmissionModes>((fixedHeader->firstByte >> 2) & 0x01);
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}
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bool HeaderDeserializer::getCrcFlag() const { return (fixedHeader->firstByte >> 1) & 0x01; }
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bool HeaderDeserializer::getLargeFileFlag() const { return fixedHeader->firstByte & 0x01; }
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cfdp::SegmentationControl HeaderDeserializer::getSegmentationControl() const {
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return static_cast<cfdp::SegmentationControl>((fixedHeader->fourthByte >> 7) & 0x01);
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}
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cfdp::WidthInBytes HeaderDeserializer::getLenEntityIds() const {
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return static_cast<cfdp::WidthInBytes>((fixedHeader->fourthByte >> 4) & 0x07);
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}
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cfdp::WidthInBytes HeaderDeserializer::getLenSeqNum() const {
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return static_cast<cfdp::WidthInBytes>(fixedHeader->fourthByte & 0x07);
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}
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cfdp::SegmentMetadataFlag HeaderDeserializer::getSegmentMetadataFlag() const {
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return static_cast<cfdp::SegmentMetadataFlag>((fixedHeader->fourthByte >> 3) & 0x01);
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}
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void HeaderDeserializer::getSourceId(cfdp::EntityId &sourceId) const {
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assignVarLenField(dynamic_cast<cfdp::VarLenField *>(&sourceId), getLenEntityIds(),
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this->sourceIdRaw);
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}
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void HeaderDeserializer::getDestId(cfdp::EntityId &destId) const {
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assignVarLenField(dynamic_cast<cfdp::VarLenField *>(&destId), getLenEntityIds(), this->destIdRaw);
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}
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void HeaderDeserializer::getTransactionSeqNum(cfdp::TransactionSeqNum &seqNum) const {
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assignVarLenField(dynamic_cast<cfdp::VarLenField *>(&seqNum), getLenSeqNum(), this->seqNumRaw);
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}
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void HeaderDeserializer::assignVarLenField(cfdp::VarLenField *field, cfdp::WidthInBytes width,
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void *sourcePtr) const {
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switch (width) {
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case (cfdp::WidthInBytes::ONE_BYTE): {
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uint8_t *fieldTyped = static_cast<uint8_t *>(sourcePtr);
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field->setValue(width, *fieldTyped);
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break;
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}
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case (cfdp::WidthInBytes::TWO_BYTES): {
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uint16_t fieldTyped = 0;
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size_t deserSize = 0;
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SerializeAdapter::deSerialize(&fieldTyped, static_cast<uint8_t *>(sourcePtr), &deserSize,
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SerializeIF::Endianness::NETWORK);
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field->setValue(width, fieldTyped);
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break;
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}
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case (cfdp::WidthInBytes::FOUR_BYTES): {
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uint32_t fieldTyped = 0;
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size_t deserSize = 0;
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SerializeAdapter::deSerialize(&fieldTyped, static_cast<uint8_t *>(sourcePtr), &deserSize,
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SerializeIF::Endianness::NETWORK);
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field->setValue(width, fieldTyped);
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break;
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}
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}
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}
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size_t HeaderDeserializer::getMaxSize() const { return maxSize; }
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bool HeaderDeserializer::hasSegmentMetadataFlag() const {
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if (this->getSegmentMetadataFlag() == cfdp::SegmentMetadataFlag::PRESENT) {
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return true;
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}
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return false;
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}
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