Merge pull request 'Added CFDP packet stack' (#528) from KSat/fsfw:mueller/cfdp-pdus into development

Reviewed-on: fsfw/fsfw#528

CMakeLists.txt

@@ -192,13 +192,13 @@ if(FSFW_BUILD_UNITTESTS)
                     "--exclude-unreachable-branches"
                 )
                 set(COVERAGE_EXCLUDES
-                    "/c/msys64/mingw64/*"
+                    "/c/msys64/mingw64/*" "*/fsfw_hal/*"
                 )
             elseif(UNIX)
                 set(COVERAGE_EXCLUDES
                     "/usr/include/*" "/usr/bin/*" "Catch2/*"
                     "/usr/local/include/*" "*/fsfw_tests/*"
-                    "*/catch2-src/*"
+                    "*/catch2-src/*" "*/fsfw_hal/*"
                 )
             endif()
 

README.md

@@ -91,7 +91,7 @@ You can use the following commands inside the `fsfw` folder to set up the build
 
 ```sh
 mkdir build-Unittest && cd build-Unittest
-cmake -DFSFW_BUILD_UNITTESTS=ON -DFSFW_OSAL=host ..
+cmake -DFSFW_BUILD_UNITTESTS=ON -DFSFW_OSAL=host -DCMAKE_BUILD_TYPE=Debug ..
 ```
 
 You can also use `-DFSFW_OSAL=linux` on Linux systems.

misc/defaultcfg/fsfwconfig/devices/logicalAddresses.h

@@ -10,7 +10,7 @@
  */
 namespace addresses {
 	/* Logical addresses have uint32_t datatype */
-	enum logicalAddresses: address_t {
+	enum LogAddr: address_t {
 	};
 }
 

src/fsfw/CMakeLists.txt

@@ -1,6 +1,7 @@
 # Core
 
 add_subdirectory(action)
+add_subdirectory(cfdp)
 add_subdirectory(container)
 add_subdirectory(controller)
 add_subdirectory(datapool)

src/fsfw/FSFW.h.in

@@ -46,6 +46,10 @@
 #define FSFW_USE_PUS_C_TELECOMMANDS         1
 #endif
 
+#ifndef FSFW_TCP_RECV_WIRETAPPING_ENABLED
+#define FSFW_TCP_RECV_WIRETAPPING_ENABLED   0
+#endif
+
 // FSFW HAL defines
 
 // Can be used for low-level debugging of the SPI bus

src/fsfw/cfdp/CFDPHandler.cpp

@@ -0,0 +1,60 @@
+#include "fsfw/ipc/CommandMessage.h"
+#include "fsfw/storagemanager/storeAddress.h"
+#include "fsfw/cfdp/CFDPHandler.h"
+#include "fsfw/cfdp/CFDPMessage.h"
+
+#include "fsfw/tmtcservices/AcceptsTelemetryIF.h"
+#include "fsfw/ipc/QueueFactory.h"
+#include "fsfw/objectmanager/ObjectManager.h"
+
+object_id_t CFDPHandler::packetSource = 0;
+object_id_t CFDPHandler::packetDestination = 0;
+
+CFDPHandler::CFDPHandler(object_id_t setObjectId, CFDPDistributor* dist) : SystemObject(setObjectId) {
+    requestQueue = QueueFactory::instance()->createMessageQueue(CFDP_HANDLER_MAX_RECEPTION);
+    distributor = dist;
+}
+
+CFDPHandler::~CFDPHandler() {}
+
+ReturnValue_t CFDPHandler::initialize() {
+    ReturnValue_t result = SystemObject::initialize();
+    if (result != RETURN_OK) {
+        return result;
+    }
+    this->distributor->registerHandler(this);
+    return HasReturnvaluesIF::RETURN_OK;
+}
+
+ReturnValue_t CFDPHandler::handleRequest(store_address_t storeId) {
+#if FSFW_VERBOSE_LEVEL >= 1
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+    sif::debug << "CFDPHandler::handleRequest" << std::endl;
+#else
+    sif::printDebug("CFDPHandler::handleRequest\n");
+#endif /* !FSFW_CPP_OSTREAM_ENABLED == 1 */
+#endif
+
+    //TODO read out packet from store using storeId
+
+    return RETURN_OK;
+}
+
+ReturnValue_t CFDPHandler::performOperation(uint8_t opCode) {
+    ReturnValue_t status = RETURN_OK;
+    CommandMessage currentMessage;
+    for (status = this->requestQueue->receiveMessage(&currentMessage); status == RETURN_OK;
+            status = this->requestQueue->receiveMessage(&currentMessage)) {
+        store_address_t storeId = CFDPMessage::getStoreId(&currentMessage);
+        this->handleRequest(storeId);
+    }
+    return RETURN_OK;
+}
+
+uint16_t CFDPHandler::getIdentifier() {
+    return 0;
+}
+
+MessageQueueId_t CFDPHandler::getRequestQueue() {
+    return this->requestQueue->getId();
+}

src/fsfw/cfdp/CFDPHandler.h

@@ -0,0 +1,62 @@
+#ifndef FSFW_CFDP_CFDPHANDLER_H_
+#define FSFW_CFDP_CFDPHANDLER_H_
+
+#include "fsfw/tmtcservices/AcceptsTelecommandsIF.h"
+#include "fsfw/objectmanager/SystemObject.h"
+#include "fsfw/returnvalues/HasReturnvaluesIF.h"
+#include "fsfw/tasks/ExecutableObjectIF.h"
+#include "fsfw/tcdistribution/CFDPDistributor.h"
+
+#include "fsfw/ipc/MessageQueueIF.h"
+
+namespace Factory{
+void setStaticFrameworkObjectIds();
+}
+
+class CFDPHandler :
+        public ExecutableObjectIF,
+        public AcceptsTelecommandsIF,
+        public SystemObject,
+        public HasReturnvaluesIF {
+    friend void (Factory::setStaticFrameworkObjectIds)();
+public:
+    CFDPHandler(object_id_t setObjectId, CFDPDistributor* distributor);
+    /**
+     * The destructor is empty.
+     */
+    virtual ~CFDPHandler();
+
+    virtual ReturnValue_t handleRequest(store_address_t storeId);
+
+    virtual ReturnValue_t initialize() override;
+    virtual uint16_t getIdentifier() override;
+    MessageQueueId_t getRequestQueue() override;
+    ReturnValue_t performOperation(uint8_t opCode) override;
+        protected:
+    /**
+     * This is a complete instance of the telecommand reception queue
+     * of the class. It is initialized on construction of the class.
+     */
+    MessageQueueIF* requestQueue = nullptr;
+
+    CFDPDistributor* distributor = nullptr;
+
+    /**
+     * The current CFDP packet to be processed.
+     * It is deleted after handleRequest was executed.
+     */
+    CFDPPacketStored currentPacket;
+
+    static object_id_t packetSource;
+
+    static object_id_t packetDestination;
+        private:
+    /**
+     * This constant sets the maximum number of packets accepted per call.
+     * Remember that one packet must be completely handled in one
+     * #handleRequest call.
+     */
+    static const uint8_t CFDP_HANDLER_MAX_RECEPTION = 100;
+};
+
+#endif /* FSFW_CFDP_CFDPHANDLER_H_ */

src/fsfw/cfdp/CFDPMessage.cpp

@@ -0,0 +1,21 @@
+#include "CFDPMessage.h"
+
+CFDPMessage::CFDPMessage() {
+}
+
+CFDPMessage::~CFDPMessage() {
+}
+
+void CFDPMessage::setCommand(CommandMessage *message,
+		store_address_t cfdpPacket) {
+	message->setParameter(cfdpPacket.raw);
+}
+
+store_address_t CFDPMessage::getStoreId(const CommandMessage *message) {
+	store_address_t storeAddressCFDPPacket;
+	storeAddressCFDPPacket = message->getParameter();
+	return storeAddressCFDPPacket;
+}
+
+void CFDPMessage::clear(CommandMessage *message) {
+}

src/fsfw/cfdp/CFDPMessage.h

@@ -0,0 +1,23 @@
+#ifndef FSFW_CFDP_CFDPMESSAGE_H_
+#define FSFW_CFDP_CFDPMESSAGE_H_
+
+#include "fsfw/ipc/CommandMessage.h"
+#include "fsfw/objectmanager/ObjectManagerIF.h"
+#include "fsfw/storagemanager/StorageManagerIF.h"
+
+class CFDPMessage {
+private:
+    CFDPMessage();
+public:
+    static const uint8_t MESSAGE_ID = messagetypes::CFDP;
+
+    virtual ~CFDPMessage();
+    static void setCommand(CommandMessage* message,
+            store_address_t cfdpPacket);
+
+    static store_address_t getStoreId(const CommandMessage* message);
+
+    static void clear(CommandMessage* message);
+};
+
+#endif /* FSFW_CFDP_CFDPMESSAGE_H_ */

src/fsfw/cfdp/CMakeLists.txt

@@ -0,0 +1,7 @@
+target_sources(${LIB_FSFW_NAME} PRIVATE
+    CFDPHandler.cpp
+    CFDPMessage.cpp
+)
+
+add_subdirectory(pdu)
+add_subdirectory(tlv)

src/fsfw/cfdp/FileSize.h

@@ -0,0 +1,83 @@
+#ifndef FSFW_SRC_FSFW_CFDP_FILESIZE_H_
+#define FSFW_SRC_FSFW_CFDP_FILESIZE_H_
+
+#include "fsfw/serialize/SerializeAdapter.h"
+#include "fsfw/serialize/SerializeIF.h"
+
+namespace cfdp {
+
+struct FileSize: public SerializeIF {
+public:
+    FileSize(): largeFile(false) {};
+
+    FileSize(uint64_t fileSize, bool isLarge = false) {
+        setFileSize(fileSize, isLarge);
+    };
+
+    ReturnValue_t serialize(bool isLarge, uint8_t **buffer, size_t *size,size_t maxSize,
+            Endianness streamEndianness) {
+        this->largeFile = isLarge;
+        return serialize(buffer, size,  maxSize, streamEndianness);
+    }
+
+    ReturnValue_t serialize(uint8_t **buffer, size_t *size,size_t maxSize,
+            Endianness streamEndianness) const override {
+        if(not largeFile) {
+            uint32_t fileSizeTyped = fileSize;
+            return SerializeAdapter::serialize(&fileSizeTyped, buffer, size, maxSize,
+                    streamEndianness);
+
+        }
+        return SerializeAdapter::serialize(&fileSize, buffer, size, maxSize, streamEndianness);
+    }
+
+    size_t getSerializedSize() const override {
+        if (largeFile) {
+            return 8;
+        } else {
+            return 4;
+        }
+    }
+
+    ReturnValue_t deSerialize(const uint8_t **buffer, size_t *size,
+            Endianness streamEndianness) override {
+        if(largeFile) {
+            return SerializeAdapter::deSerialize(&size, buffer, size, streamEndianness);
+        } else {
+            uint32_t sizeTmp = 0;
+            ReturnValue_t result = SerializeAdapter::deSerialize(&sizeTmp, buffer, size,
+                    streamEndianness);
+            if(result == HasReturnvaluesIF::RETURN_OK) {
+                fileSize = sizeTmp;
+            }
+            return result;
+        }
+    }
+
+    ReturnValue_t setFileSize(uint64_t fileSize, bool largeFile) {
+        if (not largeFile and fileSize > UINT32_MAX) {
+            // TODO: emit warning here
+            return HasReturnvaluesIF::RETURN_FAILED;
+        }
+        this->fileSize = fileSize;
+        this->largeFile = largeFile;
+        return HasReturnvaluesIF::RETURN_OK;
+    }
+
+    bool isLargeFile() const {
+        return largeFile;
+    }
+    uint64_t getSize(bool* largeFile = nullptr) const {
+        if(largeFile != nullptr) {
+            *largeFile = this->largeFile;
+        }
+        return fileSize;
+    }
+private:
+    uint64_t fileSize = 0;
+    bool largeFile = false;
+};
+
+}
+
+#endif /* FSFW_SRC_FSFW_CFDP_FILESIZE_H_ */

src/fsfw/cfdp/definitions.h

@@ -0,0 +1,153 @@
+#ifndef FSFW_SRC_FSFW_CFDP_PDU_DEFINITIONS_H_
+#define FSFW_SRC_FSFW_CFDP_PDU_DEFINITIONS_H_
+
+#include <fsfw/serialize/SerializeIF.h>
+#include <cstdint>
+#include <cstddef>
+#include "fsfw/returnvalues/HasReturnvaluesIF.h"
+#include "fsfw/returnvalues/FwClassIds.h"
+
+namespace cfdp {
+
+static constexpr uint8_t VERSION_BITS = 0b00100000;
+
+static constexpr uint8_t CFDP_CLASS_ID = CLASS_ID::CFDP;
+
+static constexpr ReturnValue_t INVALID_TLV_TYPE =
+        HasReturnvaluesIF::makeReturnCode(CFDP_CLASS_ID, 1);
+static constexpr ReturnValue_t INVALID_DIRECTIVE_FIELDS =
+        HasReturnvaluesIF::makeReturnCode(CFDP_CLASS_ID, 2);
+static constexpr ReturnValue_t INVALID_PDU_DATAFIELD_LEN =
+        HasReturnvaluesIF::makeReturnCode(CFDP_CLASS_ID, 3);
+static constexpr ReturnValue_t INVALID_ACK_DIRECTIVE_FIELDS =
+        HasReturnvaluesIF::makeReturnCode(CFDP_CLASS_ID, 4);
+//! Can not parse options. This can also occur because there are options
+//! available but the user did not pass a valid options array
+static constexpr ReturnValue_t METADATA_CANT_PARSE_OPTIONS =
+        HasReturnvaluesIF::makeReturnCode(CFDP_CLASS_ID, 5);
+static constexpr ReturnValue_t NAK_CANT_PARSE_OPTIONS =
+        HasReturnvaluesIF::makeReturnCode(CFDP_CLASS_ID, 6);
+static constexpr ReturnValue_t FINISHED_CANT_PARSE_FS_RESPONSES =
+        HasReturnvaluesIF::makeReturnCode(CFDP_CLASS_ID, 6);
+static constexpr ReturnValue_t FILESTORE_REQUIRES_SECOND_FILE =
+        HasReturnvaluesIF::makeReturnCode(CFDP_CLASS_ID, 8);
+//! Can not parse filestore response because user did not pass a valid instance
+//! or remaining size is invalid
+static constexpr ReturnValue_t FILESTORE_RESPONSE_CANT_PARSE_FS_MESSAGE =
+        HasReturnvaluesIF::makeReturnCode(CFDP_CLASS_ID, 9);
+
+//! Checksum types according to the SANA Checksum Types registry
+//! https://sanaregistry.org/r/checksum_identifiers/
+enum ChecksumType {
+    // Modular legacy checksum
+    MODULAR = 0,
+    CRC_32_PROXIMITY_1 = 1,
+    CRC_32C = 2,
+    CRC_32 = 3,
+    NULL_CHECKSUM = 15
+};
+
+enum PduType: bool {
+    FILE_DIRECTIVE = 0,
+    FILE_DATA = 1
+};
+
+enum TransmissionModes: bool {
+    ACKNOWLEDGED = 0,
+    UNACKNOWLEDGED = 1
+};
+
+enum SegmentMetadataFlag: bool {
+    NOT_PRESENT = 0,
+    PRESENT = 1
+};
+
+enum Direction: bool {
+    TOWARDS_RECEIVER = 0,
+    TOWARDS_SENDER = 1
+};
+
+enum SegmentationControl: bool {
+    NO_RECORD_BOUNDARIES_PRESERVATION = 0,
+    RECORD_BOUNDARIES_PRESERVATION = 1
+};
+
+enum WidthInBytes: uint8_t {
+    // Only those are supported for now
+    ONE_BYTE = 1,
+    TWO_BYTES = 2,
+    FOUR_BYTES = 4,
+};
+
+enum FileDirectives: uint8_t {
+    INVALID_DIRECTIVE = 0x0f,
+    EOF_DIRECTIVE = 0x04,
+    FINISH = 0x05,
+    ACK = 0x06,
+    METADATA = 0x07,
+    NAK = 0x08,
+    PROMPT = 0x09,
+    KEEP_ALIVE = 0x0c
+};
+
+enum ConditionCode: uint8_t {
+    NO_CONDITION_FIELD = 0xff,
+    NO_ERROR = 0b0000,
+    POSITIVE_ACK_LIMIT_REACHED = 0b0001,
+    KEEP_ALIVE_LIMIT_REACHED = 0b0010,
+    INVALID_TRANSMISSION_MODE = 0b0011,
+    FILESTORE_REJECTION = 0b0100,
+    FILE_CHECKSUM_FAILURE = 0b0101,
+    FILE_SIZE_ERROR = 0b0110,
+    NAK_LIMIT_REACHED = 0b0111,
+    INACTIVITY_DETECTED = 0b1000,
+    CHECK_LIMIT_REACHED = 0b1010,
+    UNSUPPORTED_CHECKSUM_TYPE = 0b1011,
+    SUSPEND_REQUEST_RECEIVED = 0b1110,
+    CANCEL_REQUEST_RECEIVED = 0b1111
+};
+
+enum AckTransactionStatus {
+    UNDEFINED = 0b00,
+    ACTIVE = 0b01,
+    TERMINATED = 0b10,
+    UNRECOGNIZED = 0b11
+};
+
+enum FinishedDeliveryCode {
+    DATA_COMPLETE = 0,
+    DATA_INCOMPLETE = 1
+};
+
+enum FinishedFileStatus {
+    DISCARDED_DELIBERATELY = 0,
+    DISCARDED_FILESTORE_REJECTION = 1,
+    RETAINED_IN_FILESTORE = 2,
+    FILE_STATUS_UNREPORTED = 3
+};
+
+enum PromptResponseRequired: bool {
+    PROMPT_NAK = 0,
+    PROMPT_KEEP_ALIVE = 1
+};
+
+enum TlvTypes: uint8_t {
+    FILESTORE_REQUEST = 0x00,
+    FILESTORE_RESPONSE = 0x01,
+    MSG_TO_USER = 0x02,
+    FAULT_HANDLER = 0x04,
+    FLOW_LABEL = 0x05,
+    ENTITY_ID = 0x06,
+    INVALID_TLV = 0xff,
+};
+
+enum RecordContinuationState {
+    NO_START_NO_END = 0b00,
+    CONTAINS_START_NO_END = 0b01,
+    CONTAINS_END_NO_START = 0b10,
+    CONTAINS_START_AND_END = 0b11
+};
+
+}
+
+#endif /* FSFW_SRC_FSFW_CFDP_PDU_DEFINITIONS_H_ */

src/fsfw/cfdp/pdu/AckInfo.cpp

@@ -0,0 +1,52 @@
+#include "AckInfo.h"
+
+AckInfo::AckInfo(cfdp::FileDirectives ackedDirective, cfdp::ConditionCode ackedConditionCode,
+        cfdp::AckTransactionStatus transactionStatus, uint8_t directiveSubtypeCode):
+        ackedDirective(ackedDirective), ackedConditionCode(ackedConditionCode),
+        transactionStatus(transactionStatus), directiveSubtypeCode(directiveSubtypeCode) {
+    if (ackedDirective == cfdp::FileDirectives::FINISH) {
+        this->directiveSubtypeCode = 0b0001;
+    } else {
+        this->directiveSubtypeCode = 0b0000;
+    }
+}
+
+cfdp::ConditionCode AckInfo::getAckedConditionCode() const {
+    return ackedConditionCode;
+}
+
+void AckInfo::setAckedConditionCode(cfdp::ConditionCode ackedConditionCode) {
+    this->ackedConditionCode = ackedConditionCode;
+    if (ackedDirective == cfdp::FileDirectives::FINISH) {
+        this->directiveSubtypeCode = 0b0001;
+    } else {
+        this->directiveSubtypeCode = 0b0000;
+    }
+}
+
+cfdp::FileDirectives AckInfo::getAckedDirective() const {
+    return ackedDirective;
+}
+
+void AckInfo::setAckedDirective(cfdp::FileDirectives ackedDirective) {
+    this->ackedDirective = ackedDirective;
+}
+
+uint8_t AckInfo::getDirectiveSubtypeCode() const {
+    return directiveSubtypeCode;
+}
+
+void AckInfo::setDirectiveSubtypeCode(uint8_t directiveSubtypeCode) {
+    this->directiveSubtypeCode = directiveSubtypeCode;
+}
+
+cfdp::AckTransactionStatus AckInfo::getTransactionStatus() const {
+    return transactionStatus;
+}
+
+AckInfo::AckInfo() {
+}
+
+void AckInfo::setTransactionStatus(cfdp::AckTransactionStatus transactionStatus) {
+    this->transactionStatus = transactionStatus;
+}

src/fsfw/cfdp/pdu/AckInfo.h

@@ -0,0 +1,33 @@
+#ifndef FSFW_SRC_FSFW_CFDP_PDU_ACKINFO_H_
+#define FSFW_SRC_FSFW_CFDP_PDU_ACKINFO_H_
+
+#include "../definitions.h"
+
+class AckInfo {
+public:
+    AckInfo();
+    AckInfo(cfdp::FileDirectives ackedDirective, cfdp::ConditionCode ackedConditionCode,
+            cfdp::AckTransactionStatus transactionStatus, uint8_t directiveSubtypeCode = 0);
+
+    cfdp::ConditionCode getAckedConditionCode() const;
+    void setAckedConditionCode(cfdp::ConditionCode ackedConditionCode);
+
+    cfdp::FileDirectives getAckedDirective() const;
+    void setAckedDirective(cfdp::FileDirectives ackedDirective);
+
+    uint8_t getDirectiveSubtypeCode() const;
+    void setDirectiveSubtypeCode(uint8_t directiveSubtypeCode);
+
+    cfdp::AckTransactionStatus getTransactionStatus() const;
+    void setTransactionStatus(cfdp::AckTransactionStatus transactionStatus);
+
+private:
+    cfdp::FileDirectives ackedDirective = cfdp::FileDirectives::INVALID_DIRECTIVE;
+    cfdp::ConditionCode ackedConditionCode = cfdp::ConditionCode::NO_CONDITION_FIELD;
+    cfdp::AckTransactionStatus transactionStatus = cfdp::AckTransactionStatus::UNDEFINED;
+    uint8_t directiveSubtypeCode = 0;
+};
+
+
+
+#endif /* FSFW_SRC_FSFW_CFDP_PDU_ACKINFO_H_ */

src/fsfw/cfdp/pdu/AckPduDeserializer.cpp

@@ -0,0 +1,38 @@
+#include "AckPduDeserializer.h"
+
+AckPduDeserializer::AckPduDeserializer(const uint8_t *pduBuf, size_t maxSize, AckInfo& info):
+        FileDirectiveDeserializer(pduBuf, maxSize), info(info) {
+}
+
+ReturnValue_t AckPduDeserializer::parseData() {
+    ReturnValue_t result = FileDirectiveDeserializer::parseData();
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+        return result;
+    }
+    size_t currentIdx = FileDirectiveDeserializer::getHeaderSize();
+    if (currentIdx + 2 > this->maxSize) {
+        return SerializeIF::BUFFER_TOO_SHORT;
+    }
+    if(not checkAndSetCodes(rawPtr[currentIdx], rawPtr[currentIdx + 1])) {
+        return cfdp::INVALID_ACK_DIRECTIVE_FIELDS;
+    }
+    return HasReturnvaluesIF::RETURN_OK;
+}
+
+bool AckPduDeserializer::checkAndSetCodes(uint8_t firstByte, uint8_t secondByte) {
+    uint8_t ackedDirective = static_cast<cfdp::FileDirectives>(firstByte >> 4);
+
+    if(ackedDirective != cfdp::FileDirectives::EOF_DIRECTIVE and
+            ackedDirective != cfdp::FileDirectives::FINISH) {
+        return false;
+    }
+    this->info.setAckedDirective(static_cast<cfdp::FileDirectives>(ackedDirective));
+    uint8_t directiveSubtypeCode = firstByte & 0x0f;
+    if(directiveSubtypeCode != 0b0000 and directiveSubtypeCode != 0b0001) {
+        return false;
+    }
+    this->info.setDirectiveSubtypeCode(directiveSubtypeCode);
+    this->info.setAckedConditionCode(static_cast<cfdp::ConditionCode>(secondByte >> 4));
+    this->info.setTransactionStatus(static_cast<cfdp::AckTransactionStatus>(secondByte & 0x0f));
+    return true;
+}

src/fsfw/cfdp/pdu/AckPduDeserializer.h

@@ -0,0 +1,26 @@
+#ifndef FSFW_SRC_FSFW_CFDP_PDU_ACKPDUDESERIALIZER_H_
+#define FSFW_SRC_FSFW_CFDP_PDU_ACKPDUDESERIALIZER_H_
+
+#include "fsfw/cfdp/pdu/FileDirectiveDeserializer.h"
+#include "AckInfo.h"
+
+class AckPduDeserializer: public FileDirectiveDeserializer {
+public:
+    AckPduDeserializer(const uint8_t* pduBuf, size_t maxSize, AckInfo& info);
+
+    /**
+     *
+     * @return
+     *  - cfdp::INVALID_DIRECTIVE_FIELDS: Invalid fields
+     */
+    ReturnValue_t parseData();
+
+private:
+    bool checkAndSetCodes(uint8_t rawAckedByte, uint8_t rawAckedConditionCode);
+    AckInfo& info;
+
+};
+
+
+
+#endif /* FSFW_SRC_FSFW_CFDP_PDU_ACKPDUDESERIALIZER_H_ */

src/fsfw/cfdp/pdu/AckPduSerializer.cpp

@@ -0,0 +1,38 @@
+#include "AckPduSerializer.h"
+
+AckPduSerializer::AckPduSerializer(AckInfo& ackInfo, PduConfig &pduConf):
+        FileDirectiveSerializer(pduConf, cfdp::FileDirectives::ACK, 2),
+        ackInfo(ackInfo) {
+}
+
+size_t AckPduSerializer::getSerializedSize() const {
+    return FileDirectiveSerializer::getWholePduSize();
+}
+
+ReturnValue_t AckPduSerializer::serialize(uint8_t **buffer, size_t *size, size_t maxSize,
+        Endianness streamEndianness) const {
+    ReturnValue_t result = FileDirectiveSerializer::serialize(buffer, size, maxSize,
+            streamEndianness);
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+        return result;
+    }
+    cfdp::FileDirectives ackedDirective = ackInfo.getAckedDirective();
+    uint8_t directiveSubtypeCode = ackInfo.getDirectiveSubtypeCode();
+    cfdp::ConditionCode ackedConditionCode = ackInfo.getAckedConditionCode();
+    cfdp::AckTransactionStatus transactionStatus = ackInfo.getTransactionStatus();
+    if(ackedDirective != cfdp::FileDirectives::FINISH and
+            ackedDirective != cfdp::FileDirectives::EOF_DIRECTIVE) {
+        // TODO: better returncode
+        return HasReturnvaluesIF::RETURN_FAILED;
+    }
+    if(*size + 2 > maxSize) {
+        return SerializeIF::BUFFER_TOO_SHORT;
+    }
+    **buffer = ackedDirective << 4 | directiveSubtypeCode;
+    *buffer += 1;
+    *size += 1;
+    **buffer = ackedConditionCode << 4 | transactionStatus;
+    *buffer += 1;
+    *size += 1;
+    return HasReturnvaluesIF::RETURN_OK;
+}

src/fsfw/cfdp/pdu/AckPduSerializer.h

@@ -0,0 +1,30 @@
+#ifndef FSFW_SRC_FSFW_CFDP_PDU_ACKPDUSERIALIZER_H_
+#define FSFW_SRC_FSFW_CFDP_PDU_ACKPDUSERIALIZER_H_
+
+#include "AckInfo.h"
+#include "FileDirectiveDeserializer.h"
+#include "FileDirectiveSerializer.h"
+
+class AckPduSerializer: public FileDirectiveSerializer {
+public:
+    /**
+     * @brief   Serializer to pack ACK PDUs
+     * @details
+     * Please note that only Finished PDUs and EOF are acknowledged.
+     * @param ackedDirective
+     * @param ackedConditionCode
+     * @param transactionStatus
+     * @param pduConf
+     */
+    AckPduSerializer(AckInfo& ackInfo, PduConfig& pduConf);
+
+    size_t getSerializedSize() const override;
+
+    ReturnValue_t serialize(uint8_t** buffer, size_t* size, size_t maxSize,
+            Endianness streamEndianness) const override;
+
+private:
+    AckInfo& ackInfo;
+};
+
+#endif /* FSFW_SRC_FSFW_CFDP_PDU_ACKPDUSERIALIZER_H_ */

src/fsfw/cfdp/pdu/CMakeLists.txt

@@ -0,0 +1,32 @@
+target_sources(${LIB_FSFW_NAME} PRIVATE
+    PduConfig.cpp
+    VarLenField.cpp
+    HeaderSerializer.cpp
+    HeaderDeserializer.cpp
+    FileDirectiveDeserializer.cpp
+    FileDirectiveSerializer.cpp
+ 
+    AckInfo.cpp
+    AckPduSerializer.cpp
+    AckPduDeserializer.cpp
+    EofInfo.cpp
+    EofPduSerializer.cpp
+    EofPduDeserializer.cpp
+    NakInfo.cpp
+    NakPduSerializer.cpp
+    NakPduDeserializer.cpp
+    FinishedInfo.cpp
+    FinishedPduSerializer.cpp
+    FinishedPduDeserializer.cpp
+    MetadataInfo.cpp
+    MetadataPduSerializer.cpp
+    MetadataPduDeserializer.cpp
+    KeepAlivePduSerializer.cpp
+    KeepAlivePduDeserializer.cpp
+    PromptPduSerializer.cpp
+    PromptPduDeserializer.cpp
+
+    FileDataSerializer.cpp
+    FileDataDeserializer.cpp
+    FileDataInfo.cpp
+)

src/fsfw/cfdp/pdu/EofInfo.cpp

@@ -0,0 +1,58 @@
+#include "EofInfo.h"
+
+EofInfo::EofInfo(cfdp::ConditionCode conditionCode, uint32_t checksum, cfdp::FileSize fileSize,
+        EntityIdTlv* faultLoc): conditionCode(conditionCode), checksum(checksum),
+        fileSize(fileSize), faultLoc(faultLoc) {
+}
+
+EofInfo::EofInfo(EntityIdTlv *faultLoc): conditionCode(cfdp::ConditionCode::NO_CONDITION_FIELD),
+        checksum(0), fileSize(0), faultLoc(faultLoc) {
+}
+
+uint32_t EofInfo::getChecksum() const {
+    return checksum;
+}
+
+cfdp::ConditionCode EofInfo::getConditionCode() const {
+    return conditionCode;
+}
+
+EntityIdTlv* EofInfo::getFaultLoc() const {
+    return faultLoc;
+}
+
+cfdp::FileSize& EofInfo::getFileSize() {
+    return fileSize;
+}
+
+void EofInfo::setChecksum(uint32_t checksum) {
+    this->checksum = checksum;
+}
+
+void EofInfo::setConditionCode(cfdp::ConditionCode conditionCode) {
+    this->conditionCode = conditionCode;
+}
+
+void EofInfo::setFaultLoc(EntityIdTlv *faultLoc) {
+    this->faultLoc = faultLoc;
+}
+
+size_t EofInfo::getSerializedSize(bool fssLarge) {
+    // Condition code + spare + 4 byte checksum
+    size_t size = 5;
+    if(fssLarge) {
+        size += 8;
+    } else {
+        size += 4;
+    }
+    // Do not account for fault location if the condition code is NO_ERROR. We assume that
+    // a serializer will not serialize the fault location here.
+    if(getFaultLoc() != nullptr and getConditionCode() != cfdp::ConditionCode::NO_ERROR) {
+        size+= faultLoc->getSerializedSize();
+    }
+    return size;
+}
+
+ReturnValue_t EofInfo::setFileSize(size_t fileSize, bool isLarge) {
+    return this->fileSize.setFileSize(fileSize, isLarge);
+}

src/fsfw/cfdp/pdu/EofInfo.h

@@ -0,0 +1,33 @@
+#ifndef FSFW_SRC_FSFW_CFDP_PDU_EOFINFO_H_
+#define FSFW_SRC_FSFW_CFDP_PDU_EOFINFO_H_
+
+#include "fsfw/cfdp/tlv/EntityIdTlv.h"
+#include "../definitions.h"
+#include "../FileSize.h"
+
+struct EofInfo {
+public:
+    EofInfo(EntityIdTlv* faultLoc = nullptr);
+    EofInfo(cfdp::ConditionCode conditionCode, uint32_t checksum, cfdp::FileSize fileSize,
+            EntityIdTlv* faultLoc = nullptr);
+
+    size_t getSerializedSize(bool fssLarge = false);
+
+    uint32_t getChecksum() const;
+    cfdp::ConditionCode getConditionCode() const;
+
+    EntityIdTlv* getFaultLoc() const;
+    cfdp::FileSize& getFileSize();
+    void setChecksum(uint32_t checksum);
+    void setConditionCode(cfdp::ConditionCode conditionCode);
+    void setFaultLoc(EntityIdTlv *faultLoc);
+    ReturnValue_t setFileSize(size_t size, bool isLarge);
+private:
+
+    cfdp::ConditionCode conditionCode;
+    uint32_t checksum;
+    cfdp::FileSize fileSize;
+    EntityIdTlv* faultLoc = nullptr;
+};
+
+#endif /* FSFW_SRC_FSFW_CFDP_PDU_EOFINFO_H_ */

src/fsfw/cfdp/pdu/EofPduDeserializer.cpp

@@ -0,0 +1,68 @@
+#include "EofPduDeserializer.h"
+#include "fsfw/FSFW.h"
+#include "fsfw/serviceinterface.h"
+
+EofPduDeserializer::EofPduDeserializer(const uint8_t *pduBuf, size_t maxSize, EofInfo& eofInfo):
+        FileDirectiveDeserializer(pduBuf, maxSize), info(eofInfo) {
+}
+
+ReturnValue_t EofPduDeserializer::parseData() {
+    ReturnValue_t result = FileDirectiveDeserializer::parseData();
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+        return result;
+    }
+
+    const uint8_t* bufPtr = rawPtr;
+    size_t expectedFileFieldLen = 4;
+    if(this->getLargeFileFlag()) {
+        expectedFileFieldLen = 8;
+    }
+    size_t currentIdx = FileDirectiveDeserializer::getHeaderSize();
+    size_t deserLen = maxSize;
+    if(maxSize < currentIdx + 5 + expectedFileFieldLen) {
+        return SerializeIF::STREAM_TOO_SHORT;
+    }
+
+    bufPtr += currentIdx;
+    deserLen -= currentIdx;
+    info.setConditionCode(static_cast<cfdp::ConditionCode>(*bufPtr >> 4));
+    bufPtr += 1;
+    deserLen -= 1;
+    uint32_t checksum = 0;
+    auto endianness = getEndianness();
+    result = SerializeAdapter::deSerialize(&checksum, &bufPtr, &deserLen, endianness);
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+        return result;
+    }
+    info.setChecksum(checksum);
+    if(this->getLargeFileFlag()) {
+        uint64_t fileSizeValue = 0;
+        result = SerializeAdapter::deSerialize(&fileSizeValue, &bufPtr, &deserLen, endianness);
+        info.setFileSize(fileSizeValue, true);
+    }
+    else {
+        uint32_t fileSizeValue = 0;
+        result = SerializeAdapter::deSerialize(&fileSizeValue, &bufPtr, &deserLen, endianness);
+        info.setFileSize(fileSizeValue, false);
+    }
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+        return result;
+    }
+    if(info.getConditionCode() != cfdp::ConditionCode::NO_ERROR) {
+        EntityIdTlv* tlvPtr = info.getFaultLoc();
+        if(tlvPtr == nullptr) {
+#if FSFW_VERBOSE_LEVEL >= 1
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+            sif::warning << "EofPduDeserializer::parseData: Ca not deserialize fault location,"
+                    " given TLV pointer invalid" << std::endl;
+#else
+            sif::printWarning("EofPduDeserializer::parseData: Ca not deserialize fault location,"
+                    " given TLV pointer invalid");
+#endif
+#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+            return HasReturnvaluesIF::RETURN_FAILED;
+        }
+        result = tlvPtr->deSerialize(&bufPtr, &deserLen, endianness);
+    }
+    return result;
+}

src/fsfw/cfdp/pdu/EofPduDeserializer.h

@@ -0,0 +1,18 @@
+#ifndef FSFW_SRC_FSFW_CFDP_PDU_EOFPDUDESERIALIZER_H_
+#define FSFW_SRC_FSFW_CFDP_PDU_EOFPDUDESERIALIZER_H_
+
+#include "fsfw/cfdp/pdu/FileDirectiveDeserializer.h"
+#include "EofInfo.h"
+
+class EofPduDeserializer: public FileDirectiveDeserializer {
+public:
+    EofPduDeserializer(const uint8_t* pduBuf, size_t maxSize, EofInfo& eofInfo);
+
+    virtual ReturnValue_t parseData() override;
+private:
+    EofInfo& info;
+};
+
+
+
+#endif /* FSFW_SRC_FSFW_CFDP_PDU_EOFPDUDESERIALIZER_H_ */

src/fsfw/cfdp/pdu/EofPduSerializer.cpp

@@ -0,0 +1,46 @@
+#include "fsfw/FSFW.h"
+#include "fsfw/serviceinterface.h"
+#include "EofPduSerializer.h"
+
+EofPduSerializer::EofPduSerializer(PduConfig &conf, EofInfo& info):
+        FileDirectiveSerializer(conf, cfdp::FileDirectives::EOF_DIRECTIVE, 9), info(info) {
+    setDirectiveDataFieldLen(info.getSerializedSize(getLargeFileFlag()));
+}
+
+size_t EofPduSerializer::getSerializedSize() const {
+    return FileDirectiveSerializer::getWholePduSize();
+}
+
+ReturnValue_t EofPduSerializer::serialize(uint8_t **buffer, size_t *size, size_t maxSize,
+        Endianness streamEndianness) const {
+    ReturnValue_t result = FileDirectiveSerializer::serialize(buffer, size, maxSize,
+            streamEndianness);
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+        return result;
+    }
+    if(*size + 1 > maxSize) {
+        return SerializeIF::BUFFER_TOO_SHORT;
+    }
+    **buffer = info.getConditionCode() << 4;
+    *buffer += 1;
+    *size += 1;
+    uint32_t checksum = info.getChecksum();
+    result = SerializeAdapter::serialize(&checksum, buffer, size, maxSize, streamEndianness);
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+        return result;
+    }
+    if(info.getFileSize().isLargeFile()) {
+        uint64_t fileSizeValue = info.getFileSize().getSize();
+        result = SerializeAdapter::serialize(&fileSizeValue, buffer, size,
+                maxSize, streamEndianness);
+    }
+    else {
+        uint32_t fileSizeValue = info.getFileSize().getSize();
+        result = SerializeAdapter::serialize(&fileSizeValue, buffer, size,
+                maxSize, streamEndianness);
+    }
+    if(info.getFaultLoc() != nullptr and info.getConditionCode() != cfdp::ConditionCode::NO_ERROR) {
+        result = info.getFaultLoc()->serialize(buffer, size, maxSize, streamEndianness);
+    }
+    return result;
+}

src/fsfw/cfdp/pdu/EofPduSerializer.h

@@ -0,0 +1,22 @@
+#ifndef FSFW_SRC_FSFW_CFDP_PDU_EOFPDUSERIALIZER_H_
+#define FSFW_SRC_FSFW_CFDP_PDU_EOFPDUSERIALIZER_H_
+
+#include "fsfw/cfdp/pdu/FileDirectiveSerializer.h"
+#include "fsfw/cfdp/tlv/EntityIdTlv.h"
+#include "EofInfo.h"
+
+class EofPduSerializer: public FileDirectiveSerializer {
+public:
+    EofPduSerializer(PduConfig &conf, EofInfo& info);
+
+    size_t getSerializedSize() const override;
+
+    ReturnValue_t serialize(uint8_t** buffer, size_t* size, size_t maxSize,
+            Endianness streamEndianness) const override;
+private:
+    EofInfo& info;
+};
+
+
+
+#endif /* FSFW_SRC_FSFW_CFDP_PDU_EOFPDUSERIALIZER_H_ */

src/fsfw/cfdp/pdu/FileDataDeserializer.cpp

@@ -0,0 +1,52 @@
+#include "FileDataDeserializer.h"
+
+FileDataDeserializer::FileDataDeserializer(const uint8_t *pduBuf, size_t maxSize,
+        FileDataInfo& info):
+        HeaderDeserializer(pduBuf, maxSize), info(info) {
+}
+
+ReturnValue_t FileDataDeserializer::parseData() {
+    ReturnValue_t result = HeaderDeserializer::parseData();
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+        return result;
+    }
+    size_t currentIdx = HeaderDeserializer::getHeaderSize();
+    const uint8_t* buf = rawPtr + currentIdx;
+    size_t remSize = HeaderDeserializer::getWholePduSize() - currentIdx;
+    if (remSize < 1) {
+        return SerializeIF::STREAM_TOO_SHORT;
+    }
+    if(hasSegmentMetadataFlag()) {
+        info.setSegmentMetadataFlag(true);
+        info.setRecordContinuationState(static_cast<cfdp::RecordContinuationState>(
+                (*buf >> 6) & 0b11));
+        size_t segmentMetadataLen = *buf & 0b00111111;
+        info.setSegmentMetadataLen(segmentMetadataLen);
+        if(remSize < segmentMetadataLen + 1) {
+            return SerializeIF::STREAM_TOO_SHORT;
+        }
+        if(segmentMetadataLen > 0) {
+            buf += 1;
+            remSize -= 1;
+            info.setSegmentMetadata(buf);
+            buf += segmentMetadataLen;
+            remSize -= segmentMetadataLen;
+        }
+    }
+    result = info.getOffset().deSerialize(&buf, &remSize, this->getEndianness());
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+        return result;
+    }
+    if(remSize > 0) {
+        info.setFileData(buf, remSize);
+    }
+    return HasReturnvaluesIF::RETURN_OK;
+}
+
+SerializeIF::Endianness FileDataDeserializer::getEndianness() const {
+    return endianness;
+}
+
+void FileDataDeserializer::setEndianness(SerializeIF::Endianness endianness) {
+    this->endianness = endianness;
+}

src/fsfw/cfdp/pdu/FileDataDeserializer.h

@@ -0,0 +1,22 @@
+#ifndef FSFW_SRC_FSFW_CFDP_PDU_FILEDATADESERIALIZER_H_
+#define FSFW_SRC_FSFW_CFDP_PDU_FILEDATADESERIALIZER_H_
+
+#include "FileDataInfo.h"
+#include "HeaderDeserializer.h"
+#include "../definitions.h"
+
+class FileDataDeserializer: public HeaderDeserializer {
+public:
+    FileDataDeserializer(const uint8_t* pduBuf, size_t maxSize, FileDataInfo& info);
+
+    ReturnValue_t parseData();
+    SerializeIF::Endianness getEndianness() const;
+    void setEndianness(SerializeIF::Endianness endianness = SerializeIF::Endianness::NETWORK);
+
+private:
+
+    SerializeIF::Endianness endianness = SerializeIF::Endianness::NETWORK;
+    FileDataInfo& info;
+};
+
+#endif /* FSFW_SRC_FSFW_CFDP_PDU_FILEDATADESERIALIZER_H_ */

src/fsfw/cfdp/pdu/FileDataInfo.cpp

@@ -0,0 +1,104 @@
+#include "FileDataInfo.h"
+
+FileDataInfo::FileDataInfo(cfdp::FileSize &offset, const uint8_t *fileData, size_t fileSize):
+        offset(offset), fileData(fileData), fileSize(fileSize) {
+}
+
+FileDataInfo::FileDataInfo(cfdp::FileSize &offset): offset(offset) {
+}
+
+void FileDataInfo::setSegmentMetadataFlag(bool enable) {
+    if(enable) {
+        segmentMetadataFlag = cfdp::SegmentMetadataFlag::PRESENT;
+    } else {
+        segmentMetadataFlag = cfdp::SegmentMetadataFlag::NOT_PRESENT;
+    }
+}
+
+size_t FileDataInfo::getSerializedSize(bool largeFile) const {
+    size_t sz = 0;
+    if(segmentMetadataFlag == cfdp::SegmentMetadataFlag::PRESENT) {
+        sz += 1 + segmentMetadataLen;
+    }
+    if(largeFile) {
+        sz += 8;
+    } else {
+        sz += 4;
+    }
+    sz += fileSize;
+    return sz;
+}
+
+cfdp::SegmentMetadataFlag FileDataInfo::getSegmentMetadataFlag() const {
+    return this->segmentMetadataFlag;
+}
+
+bool FileDataInfo::hasSegmentMetadata() const {
+    if(segmentMetadataFlag == cfdp::SegmentMetadataFlag::PRESENT) {
+        return true;
+    }
+    return false;
+}
+
+cfdp::RecordContinuationState FileDataInfo::getRecordContinuationState() const {
+    return this->recContState;
+}
+
+size_t FileDataInfo::getSegmentMetadataLen() const {
+    return segmentMetadataLen;
+}
+
+ReturnValue_t FileDataInfo::addSegmentMetadataInfo(cfdp::RecordContinuationState recContState,
+        const uint8_t* segmentMetadata, size_t segmentMetadataLen) {
+    this->segmentMetadataFlag = cfdp::SegmentMetadataFlag::PRESENT;
+    this->recContState = recContState;
+    if(segmentMetadataLen > 63) {
+        return HasReturnvaluesIF::RETURN_FAILED;
+    }
+    this->segmentMetadata = segmentMetadata;
+    this->segmentMetadataLen = segmentMetadataLen;
+    return HasReturnvaluesIF::RETURN_OK;
+}
+
+const uint8_t* FileDataInfo::getFileData(size_t *fileSize) const {
+    if(fileSize != nullptr) {
+        *fileSize = this->fileSize;
+    }
+    return fileData;
+}
+
+const uint8_t* FileDataInfo::getSegmentMetadata(size_t *segmentMetadataLen) {
+    if(segmentMetadataLen != nullptr) {
+        *segmentMetadataLen = this->segmentMetadataLen;
+    }
+    return segmentMetadata;
+}
+
+cfdp::FileSize& FileDataInfo::getOffset() {
+    return offset;
+}
+
+void FileDataInfo::setRecordContinuationState(cfdp::RecordContinuationState recContState) {
+    this->recContState = recContState;
+}
+
+void FileDataInfo::setSegmentMetadataLen(size_t len) {
+    this->segmentMetadataLen = len;
+}
+
+void FileDataInfo::setSegmentMetadata(const uint8_t *ptr) {
+    this->segmentMetadata = ptr;
+}
+
+void FileDataInfo::setFileData(const uint8_t *fileData, size_t fileSize) {
+    this->fileData = fileData;
+    this->fileSize = fileSize;
+}
+
+cfdp::SegmentationControl FileDataInfo::getSegmentationControl() const {
+    return segCtrl;
+}
+
+void FileDataInfo::setSegmentationControl(cfdp::SegmentationControl segCtrl) {
+    this->segCtrl = segCtrl;
+}

src/fsfw/cfdp/pdu/FileDataInfo.h

@@ -0,0 +1,45 @@
+#ifndef FSFW_SRC_FSFW_CFDP_PDU_FILEDATAINFO_H_
+#define FSFW_SRC_FSFW_CFDP_PDU_FILEDATAINFO_H_
+
+#include <fsfw/cfdp/definitions.h>
+#include <fsfw/cfdp/FileSize.h>
+
+class FileDataInfo {
+public:
+    FileDataInfo(cfdp::FileSize& offset);
+    FileDataInfo(cfdp::FileSize& offset, const uint8_t* fileData, size_t fileSize);
+
+    size_t getSerializedSize(bool largeFile = false) const;
+
+    cfdp::FileSize& getOffset();
+    const uint8_t* getFileData(size_t* fileSize = nullptr) const;
+    void setFileData(const uint8_t* fileData, size_t fileSize);
+
+    cfdp::SegmentMetadataFlag getSegmentMetadataFlag() const;
+    cfdp::SegmentationControl getSegmentationControl() const;
+    cfdp::RecordContinuationState getRecordContinuationState() const;
+    void setRecordContinuationState(cfdp::RecordContinuationState recContState);
+    void setSegmentationControl(cfdp::SegmentationControl segCtrl);
+
+    size_t getSegmentMetadataLen() const;
+    void setSegmentMetadataLen(size_t len);
+    void setSegmentMetadata(const uint8_t* ptr);
+    bool hasSegmentMetadata() const;
+    void setSegmentMetadataFlag(bool enable);
+    ReturnValue_t addSegmentMetadataInfo(cfdp::RecordContinuationState recContState,
+            const uint8_t* segmentMetadata, size_t segmentMetadataLen);
+    const uint8_t* getSegmentMetadata(size_t* segmentMetadataLen = nullptr);
+
+private:
+    cfdp::SegmentMetadataFlag segmentMetadataFlag = cfdp::SegmentMetadataFlag::NOT_PRESENT;
+    cfdp::SegmentationControl segCtrl =
+            cfdp::SegmentationControl::NO_RECORD_BOUNDARIES_PRESERVATION;
+    cfdp::FileSize& offset;
+    const uint8_t* fileData = nullptr;
+    size_t fileSize = 0;
+    cfdp::RecordContinuationState recContState = cfdp::RecordContinuationState::NO_START_NO_END;
+    size_t segmentMetadataLen = 0;
+    const uint8_t* segmentMetadata = nullptr;
+};
+
+#endif /* FSFW_SRC_FSFW_CFDP_PDU_FILEDATAINFO_H_ */

src/fsfw/cfdp/pdu/FileDataSerializer.cpp

@@ -0,0 +1,54 @@
+#include "FileDataSerializer.h"
+#include <cstring>
+
+FileDataSerializer::FileDataSerializer(PduConfig& conf, FileDataInfo& info):
+        HeaderSerializer(conf, cfdp::PduType::FILE_DATA, 0, info.getSegmentMetadataFlag()),
+        info(info) {
+    update();
+}
+
+void FileDataSerializer::update() {
+    this->setSegmentMetadataFlag(info.getSegmentMetadataFlag());
+    this->setSegmentationControl(info.getSegmentationControl());
+    setPduDataFieldLen(info.getSerializedSize(this->getLargeFileFlag()));
+}
+
+ReturnValue_t FileDataSerializer::serialize(uint8_t **buffer, size_t *size, size_t maxSize,
+        Endianness streamEndianness) const {
+    ReturnValue_t result = HeaderSerializer::serialize(buffer, size, maxSize, streamEndianness);
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+        return result;
+    }
+    if(*size + this->getSerializedSize() > maxSize) {
+        return SerializeIF::BUFFER_TOO_SHORT;
+    }
+    const uint8_t* readOnlyPtr = nullptr;
+    if (this->hasSegmentMetadataFlag()) {
+        size_t segmentMetadataLen = info.getSegmentMetadataLen();
+        **buffer = info.getRecordContinuationState() << 6 | segmentMetadataLen;
+        *buffer += 1;
+        *size += 1;
+        readOnlyPtr = info.getSegmentMetadata();
+        std::memcpy(*buffer, readOnlyPtr, segmentMetadataLen);
+        *buffer += segmentMetadataLen;
+        *size += segmentMetadataLen;
+    }
+    cfdp::FileSize& offset = info.getOffset();
+    result = offset.serialize(this->getLargeFileFlag(), buffer, size, maxSize, streamEndianness);
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+        return result;
+    }
+    size_t fileSize = 0;
+    readOnlyPtr = info.getFileData(&fileSize);
+    if(*size + fileSize > maxSize) {
+        return SerializeIF::BUFFER_TOO_SHORT;
+    }
+    std::memcpy(*buffer, readOnlyPtr, fileSize);
+    *buffer += fileSize;
+    *size += fileSize;
+    return HasReturnvaluesIF::RETURN_OK;
+}
+
+size_t FileDataSerializer::getSerializedSize() const {
+    return HeaderSerializer::getSerializedSize() + info.getSerializedSize(this->getLargeFileFlag());
+}

src/fsfw/cfdp/pdu/FileDataSerializer.h

@@ -0,0 +1,23 @@
+#ifndef FSFW_SRC_FSFW_CFDP_PDU_FILEDATASERIALIZER_H_
+#define FSFW_SRC_FSFW_CFDP_PDU_FILEDATASERIALIZER_H_
+
+#include "FileDataInfo.h"
+#include "../definitions.h"
+#include "HeaderSerializer.h"
+
+class FileDataSerializer: public HeaderSerializer {
+public:
+    FileDataSerializer(PduConfig& conf, FileDataInfo& info);
+
+    void update();
+
+    ReturnValue_t serialize(uint8_t** buffer, size_t* size, size_t maxSize,
+            Endianness streamEndianness) const override;
+
+    size_t getSerializedSize() const override;
+
+private:
+    FileDataInfo& info;
+};
+
+#endif /* FSFW_SRC_FSFW_CFDP_PDU_FILEDATADESERIALIZER_H_ */

src/fsfw/cfdp/pdu/FileDirectiveDeserializer.cpp

@@ -0,0 +1,55 @@
+#include "FileDirectiveDeserializer.h"
+
+FileDirectiveDeserializer::FileDirectiveDeserializer(const uint8_t *pduBuf, size_t maxSize):
+        HeaderDeserializer(pduBuf, maxSize) {
+}
+
+cfdp::FileDirectives FileDirectiveDeserializer::getFileDirective() const {
+    return fileDirective;
+}
+
+ReturnValue_t FileDirectiveDeserializer::parseData() {
+    ReturnValue_t result = HeaderDeserializer::parseData();
+    if(result != HasReturnvaluesIF::RETURN_OK) {
+        return result;
+    }
+    if(this->getPduDataFieldLen() < 1) {
+        return cfdp::INVALID_PDU_DATAFIELD_LEN;
+    }
+    if(FileDirectiveDeserializer::getWholePduSize() > maxSize) {
+        return SerializeIF::STREAM_TOO_SHORT;
+    }
+    size_t currentIdx = HeaderDeserializer::getHeaderSize();
+    if(not checkFileDirective(rawPtr[currentIdx])) {
+        return cfdp::INVALID_DIRECTIVE_FIELDS;
+    }
+    setFileDirective(static_cast<cfdp::FileDirectives>(rawPtr[currentIdx]));
+    return HasReturnvaluesIF::RETURN_OK;
+}
+
+size_t FileDirectiveDeserializer::getHeaderSize() const {
+    // return size of header plus the directive byte
+    return HeaderDeserializer::getHeaderSize() + 1;
+}
+
+bool FileDirectiveDeserializer::checkFileDirective(uint8_t rawByte) {
+    if(rawByte < cfdp::FileDirectives::EOF_DIRECTIVE or
+            (rawByte > cfdp::FileDirectives::PROMPT and
+             rawByte != cfdp::FileDirectives::KEEP_ALIVE)) {