continued dest handler

Reviewed-on: #673

CHANGELOG.md

@@ -8,6 +8,23 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 # [unreleased]
 
+# [v6.0.0]
+
+## Added
+
+- Add new `UnsignedByteField` class
+  PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/660
+
+## Changes
+
+- Removed `HasReturnvaluesIF` class in favor of `returnvalue` namespace with `OK` and `FAILED`
+  constants.
+  PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/659
+- Overhaul of the TMTC stack, including various changes and improvements
+  for other modules
+  PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/655
+  which also includes a migration guide
+
 # [v5.0.0] 25.07.2022
 
 ## Changes
@@ -24,7 +41,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - HAL Devicehandlers: Periodic printout is run-time configurable now
 - `oneShotAction` flag in the `TestTask` class is not static anymore
 - `SimpleRingBuffer::writeData` now checks if the amount is larger than the total size of the 
-  Buffer and rejects such writeData calls with `HasReturnvaluesIF::RETURN_FAILED`
+  Buffer and rejects such writeData calls with `returnvalue::FAILED`
   PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/586
 - Major update for version handling, using `git describe` to fetch version information with git.
   PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/601

CMakeLists.txt

@@ -104,7 +104,8 @@ if(FSFW_GENERATE_SECTIONS)
   option(FSFW_REMOVE_UNUSED_CODE "Remove unused code" ON)
 endif()
 
-option(FSFW_BUILD_TESTS "Build unittest binary in addition to static library"
+option(FSFW_BUILD_TESTS
+       "Build unittest binary in addition to static library. Requires Catch2"
        OFF)
 option(FSFW_CICD_BUILD "Build for CI/CD. This can disable problematic test" OFF)
 option(FSFW_BUILD_DOCS "Build documentation with Sphinx and Doxygen" OFF)
@@ -115,9 +116,14 @@ endif()
 option(FSFW_WARNING_SHADOW_LOCAL_GCC "Enable -Wshadow=local warning in GCC" ON)
 # Options to exclude parts of the FSFW from compilation.
 option(FSFW_ADD_INTERNAL_TESTS "Add internal unit tests" ON)
-option(FSFW_ADD_UNITTESTS "Add regular unittests. Requires Catch2" OFF)
 option(FSFW_ADD_HAL "Add Hardware Abstraction Layer" ON)
 
+if(UNIX)
+  option(FSFW_HAL_LINUX_ADD_PERIPHERAL_DRIVERS "Add Linux peripheral drivers"
+         OFF)
+  option(FSFW_HAL_LINUX_ADD_LIBGPIOD "Attempt to add Linux GPIOD drivers" OFF)
+endif()
+
 # Optional sources
 option(FSFW_ADD_PUS "Compile with PUS sources" ON)
 option(FSFW_ADD_MONITORING "Compile with monitoring components" ON)
@@ -183,7 +189,10 @@ if(FSFW_BUILD_TESTS)
   endif()
 endif()
 
-message(STATUS "${MSG_PREFIX} Finding and/or providing ETL library")
+message(
+  STATUS
+    "${MSG_PREFIX} Finding and/or providing etl library with version ${FSFW_ETL_LIB_MAJOR_VERSION}"
+)
 
 # Check whether the user has already installed ETL first
 find_package(${FSFW_ETL_LIB_NAME} ${FSFW_ETL_LIB_MAJOR_VERSION} QUIET)
@@ -191,7 +200,7 @@ find_package(${FSFW_ETL_LIB_NAME} ${FSFW_ETL_LIB_MAJOR_VERSION} QUIET)
 if(NOT ${FSFW_ETL_LIB_NAME}_FOUND)
   message(
     STATUS
-      "No ETL installation was found with find_package. Installing and providing "
+      "${MSG_PREFIX} No ETL installation was found with find_package. Installing and providing "
       "etl with FindPackage")
   include(FetchContent)
 

README.md

@@ -132,7 +132,7 @@ You can use the following commands inside the `fsfw` folder to set up the build
 
 ```sh
 mkdir build-tests && cd build-tests
-cmake -DFSFW_BUILD_UNITTESTS=ON -DFSFW_OSAL=host -DCMAKE_BUILD_TYPE=Debug ..
+cmake -DFSFW_BUILD_TESTS=ON -DFSFW_OSAL=host -DCMAKE_BUILD_TYPE=Debug ..
 ```
 
 You can also use `-DFSFW_OSAL=linux` on Linux systems.

automation/Jenkinsfile

@@ -1,6 +1,6 @@
 pipeline {
     environment {
-        BUILDDIR = 'build-tests'
+        BUILDDIR = 'cmake-build-tests'
     }
     agent {
         docker { image 'fsfw-ci:d3'}

docs/README-highlevel.md

@@ -14,7 +14,7 @@ FSFW to achieve that. The fsfw uses run-time type information but exceptions are
 # Failure Handling
 
 Functions should return a defined `ReturnValue_t` to signal to the caller that something has
-gone wrong. Returnvalues must be unique. For this the function `HasReturnvaluesIF::makeReturnCode`
+gone wrong. Returnvalues must be unique. For this the function `returnvalue::makeCode`
 or the macro `MAKE_RETURN` can be used. The `CLASS_ID` is a unique id for that type of object.
 See `returnvalues/FwClassIds` folder. The user can add custom `CLASS_ID`s via the
 `fsfwconfig` folder.

docs/README-localpools.md

@@ -144,7 +144,7 @@ ReturnValue_t GyroHandler::initializeLocalDataPool(localpool::DataPool &localDat
 			new PoolEntry<uint8_t>({0}));
 
 	poolManager.subscribeForPeriodicPacket(gyroData.getSid(), false, 4.0, false);
-	return HasReturnvaluesIF::RETURN_OK;
+	return returnvalue::OK;
 }
 ```
 
@@ -154,7 +154,7 @@ in any case:
 
 ```cpp
 PoolReadGuard readHelper(&gyroData);
-if(readHelper.getReadResult() == HasReturnvaluesIF::RETURN_OK) {
+if(readHelper.getReadResult() == returnvalue::OK) {
 	if(not gyroData.isValid()) {
 		gyroData.setValidity(true, true);
 	}

docs/api.rst

@@ -4,6 +4,7 @@ API
 .. toctree::
    :maxdepth: 4
 
+   api/cfdp
    api/objectmanager
    api/task
    api/ipc

docs/api/cfdp.rst

@@ -0,0 +1,8 @@
+CFDP API
+=================
+
+``UserBase``
+-----------------
+
+.. doxygenclass:: cfdp::UserBase
+	:members:

docs/api/returnvalue.rst

@@ -3,7 +3,7 @@
 Returnvalue API
 ==================
 
-.. doxygenfile:: HasReturnvaluesIF.h
+.. doxygenfile:: returnvalue.h
 
 .. _fwclassids:
 

docs/conf.py

@@ -17,12 +17,12 @@
 
 # -- Project information -----------------------------------------------------
 
-project = 'Flight Software Framework'
-copyright = '2021, Institute of Space Systems (IRS)'
-author = 'Institute of Space Systems (IRS)'
+project = "Flight Software Framework"
+copyright = "2021, Institute of Space Systems (IRS)"
+author = "Institute of Space Systems (IRS)"
 
 # The full version, including alpha/beta/rc tags
-release = '2.0.1'
+release = "2.0.1"
 
 
 # -- General configuration ---------------------------------------------------
@@ -30,17 +30,17 @@ release = '2.0.1'
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = [ "breathe" ]
+extensions = ["breathe"]
 
 breathe_default_project = "fsfw"
 
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
+templates_path = ["_templates"]
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
 
 
 # -- Options for HTML output -------------------------------------------------
@@ -48,9 +48,9 @@ exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'alabaster'
+html_theme = "alabaster"
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = []
+html_static_path = []

docs/devicehandlers.rst

@@ -75,11 +75,11 @@ and the respective source file with sensible default return values:
 	void TestDeviceHandler::doShutDown() {}
 
 	ReturnValue_t TestDeviceHandler::buildNormalDeviceCommand(DeviceCommandId_t* id) {
-	  return HasReturnvaluesIF::RETURN_OK;
+	  return returnvalue::OK;
 	}
 
 	ReturnValue_t TestDeviceHandler::buildTransitionDeviceCommand(DeviceCommandId_t* id) {
-	  return HasReturnvaluesIF::RETURN_OK;
+	  return returnvalue::OK;
 	}
 
 	void TestDeviceHandler::fillCommandAndReplyMap() {}
@@ -87,17 +87,17 @@ and the respective source file with sensible default return values:
 	ReturnValue_t TestDeviceHandler::buildCommandFromCommand(DeviceCommandId_t deviceCommand,
 	                                                         const uint8_t* commandData,
 	                                                         size_t commandDataLen) {
-	  return HasReturnvaluesIF::RETURN_OK;
+	  return returnvalue::OK;
 	}
 
 	ReturnValue_t TestDeviceHandler::scanForReply(const uint8_t* start, size_t remainingSize,
 	                                              DeviceCommandId_t* foundId, size_t* foundLen) {
-	  return HasReturnvaluesIF::RETURN_OK;
+	  return returnvalue::OK;
 	}
 
 	ReturnValue_t TestDeviceHandler::interpretDeviceReply(DeviceCommandId_t id,
 	                                                      const uint8_t* packet) {
-	  return HasReturnvaluesIF::RETURN_OK;
+	  return returnvalue::OK;
 	}
 
 	uint32_t TestDeviceHandler::getTransitionDelayMs(Mode_t modeFrom, Mode_t modeTo) {
@@ -106,5 +106,5 @@ and the respective source file with sensible default return values:
 
 	ReturnValue_t TestDeviceHandler::initializeLocalDataPool(localpool::DataPool& localDataPoolMap,
 	                                                         LocalDataPoolManager& poolManager) {
-	  return HasReturnvaluesIF::RETURN_OK;
+	  return returnvalue::OK;
 	}

docs/getting_started.rst

@@ -106,7 +106,7 @@ You can use the following commands inside the ``fsfw`` folder to set up the buil
 .. code-block:: console
 
    mkdir build-tests && cd build-tests
-   cmake -DFSFW_BUILD_UNITTESTS=ON -DFSFW_OSAL=host ..
+   cmake -DFSFW_BUILD_TESTS=ON -DFSFW_OSAL=host ..
 
 
 You can also use ``-DFSFW_OSAL=linux`` on Linux systems.

docs/highlevel.rst

@@ -7,18 +7,20 @@ Structure
 ----------
 
 The general structure is driven by the usage of interfaces provided by objects.
-The FSFW uses C++11 as baseline. The intention behind this is that this C++ Standard should be
-widely available, even with older compilers.
-The FSFW uses dynamic allocation during the initialization but provides static containers during runtime.
-This simplifies the instantiation of objects and allows the usage of some standard containers.
-Dynamic Allocation after initialization is discouraged and different solutions are provided in the
-FSFW to achieve that. The fsfw uses run-time type information but exceptions are not allowed.
+The FSFW uses C++17 as baseline.
+It also uses dynamic allocation during the initialization but provides
+static containers during runtime.
+This simplifies the instantiation of objects and allows the usage of some
+standard containers.
+Dynamic Allocation after initialization is discouraged and different solutions
+are provided in the FSFW to achieve that. The fsfw uses run-time type
+information but will not throw exceptions.
 
 Failure Handling
 -----------------
 
 Functions should return a defined :cpp:type:`ReturnValue_t` to signal to the caller that something has
-gone wrong. Returnvalues must be unique. For this the function :cpp:func:`HasReturnvaluesIF::makeReturnCode`
+gone wrong. Returnvalues must be unique. For this the function :cpp:func:`returnvalue::makeCode`
 or the :ref:`macro MAKE_RETURN_CODE <retvalapi>` can be used. The ``CLASS_ID`` is a unique ID for that type of object.
 See the :ref:`FSFW Class IDs file <fwclassids>`. The user can add custom ``CLASS_ID``\s via the
 ``fsfwconfig`` folder.

docs/localpools.rst

@@ -150,7 +150,7 @@ with a housekeeping service command.
 				new PoolEntry<uint8_t>({0}));
 
 		poolManager.subscribeForPeriodicPacket(gyroData.getSid(), false, 4.0, false);
-		return HasReturnvaluesIF::RETURN_OK;
+		return returnvalue::OK;
 	}
 
 Now, if we receive some sensor data and converted them into the right format,
@@ -160,7 +160,7 @@ in any case:
 .. code-block:: cpp
 
 	PoolReadGuard readHelper(&gyroData);
-	if(readHelper.getReadResult() == HasReturnvaluesIF::RETURN_OK) {
+	if(readHelper.getReadResult() == returnvalue::OK) {
 		if(not gyroData.isValid()) {
 			gyroData.setValidity(true, true);
 		}

misc/defaultcfg/fsfwconfig/objects/FsfwFactory.cpp

@@ -35,8 +35,8 @@ void Factory::produceFsfwObjects(void) {
 }
 
 void Factory::setStaticFrameworkObjectIds() {
-	PusServiceBase::packetSource = objects::NO_OBJECT;
-	PusServiceBase::packetDestination = objects::NO_OBJECT;
+	PusServiceBase::PUS_DISTRIBUTOR = objects::NO_OBJECT;
+	PusServiceBase::PACKET_DESTINATION = objects::NO_OBJECT;
 
 	CommandingServiceBase::defaultPacketSource = objects::NO_OBJECT;
 	CommandingServiceBase::defaultPacketDestination = objects::NO_OBJECT;

misc/defaultcfg/fsfwconfig/pollingsequence/PollingSequenceFactory.cpp

@@ -11,15 +11,15 @@ ReturnValue_t pst::pollingSequenceInitDefault(
 
 	/* Add polling sequence table here */
 
-	if (thisSequence->checkSequence() == HasReturnvaluesIF::RETURN_OK) {
-		return HasReturnvaluesIF::RETURN_OK;
+	if (thisSequence->checkSequence() == returnvalue::OK) {
+		return returnvalue::OK;
 	}
 	else {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
 		sif::error << "pst::pollingSequenceInitDefault: Sequence invalid!"
 		        << std::endl;
 #endif
-		return HasReturnvaluesIF::RETURN_FAILED;
+		return returnvalue::FAILED;
 	}
 }
 

misc/defaultcfg/fsfwconfig/pollingsequence/PollingSequenceFactory.h

@@ -1,7 +1,7 @@
 #ifndef POLLINGSEQUENCEFACTORY_H_
 #define POLLINGSEQUENCEFACTORY_H_
 
-#include <fsfw/returnvalues/HasReturnvaluesIF.h>
+#include <fsfw/returnvalues/returnvalue.h>
 
 class FixedTimeslotTaskIF;
 

scripts/auto-formatter.sh

@@ -3,11 +3,17 @@ if [[ ! -f README.md ]]; then
   cd ..
 fi
 
+folder_list=(
+  "./src"
+  "./unittests"
+)
+
 cmake_fmt="cmake-format"
 file_selectors="-iname CMakeLists.txt"
 if command -v ${cmake_fmt} &> /dev/null; then
   ${cmake_fmt} -i CMakeLists.txt
-  find ./src ${file_selectors} | xargs ${cmake_fmt}  -i
+  find ./src ${file_selectors} | xargs ${cmake_fmt} -i
+  find ./unittests ${file_selectors} | xargs ${cmake_fmt} -i
 else
   echo "No ${cmake_fmt} tool found, not formatting CMake files"
 fi
@@ -15,8 +21,10 @@ fi
 cpp_format="clang-format"
 file_selectors="-iname *.h -o -iname *.cpp -o -iname *.c -o -iname *.tpp"
 if command -v ${cpp_format} &> /dev/null; then
-  find ./src ${file_selectors} | xargs ${cpp_format} --style=file -i
-  find ./unittests ${file_selectors} | xargs ${cpp_format} --style=file -i
+  for dir in ${folder_list[@]}; do
+    echo "Auto-formatting ${dir} recursively"
+    find ${dir} ${file_selectors} | xargs clang-format --style=file -i
+  done
 else
   echo "No ${cpp_format} tool found, not formatting C++/C files"
 fi

scripts/helper.py

@@ -13,7 +13,7 @@ from shutil import which
 from typing import List
 
 
-UNITTEST_FOLDER_NAME = "build-tests"
+UNITTEST_FOLDER_NAME = "cmake-build-tests"
 DOCS_FOLDER_NAME = "build-docs"
 
 
@@ -51,7 +51,7 @@ def main():
     parser.add_argument(
         "-g",
         "--generators",
-        default = "Ninja",
+        default="Ninja",
         action="store",
         help="CMake generators",
     )
@@ -165,10 +165,18 @@ def create_tests_build_cfg(args):
     os.mkdir(UNITTEST_FOLDER_NAME)
     os.chdir(UNITTEST_FOLDER_NAME)
     if args.windows:
-        cmake_cmd = 'cmake -G "' + args.generators + '" -DFSFW_OSAL=host -DFSFW_BUILD_TESTS=ON \
+        cmake_cmd = (
+            'cmake -G "'
+            + args.generators
+            + '" -DFSFW_OSAL=host -DFSFW_BUILD_TESTS=ON \
         -DGCOVR_PATH="py -m gcovr" ..'
+        )
     else:
-        cmake_cmd = 'cmake -G "' + args.generators + '" -DFSFW_OSAL=host -DFSFW_BUILD_TESTS=ON ..'
+        cmake_cmd = (
+            'cmake -G "'
+            + args.generators
+            + '" -DFSFW_OSAL=host -DFSFW_BUILD_TESTS=ON ..'
+        )
     cmd_runner(cmake_cmd)
     os.chdir("..")
 

src/fsfw/CMakeLists.txt

@@ -31,6 +31,7 @@ add_subdirectory(thermal)
 add_subdirectory(timemanager)
 add_subdirectory(tmtcpacket)
 add_subdirectory(tmtcservices)
+add_subdirectory(filesystem)
 
 # Optional
 

src/fsfw/action/ActionHelper.cpp

@@ -12,7 +12,7 @@ ReturnValue_t ActionHelper::handleActionMessage(CommandMessage* command) {
   if (command->getCommand() == ActionMessage::EXECUTE_ACTION) {
     ActionId_t currentAction = ActionMessage::getActionId(command);
     prepareExecution(command->getSender(), currentAction, ActionMessage::getStoreId(command));
-    return HasReturnvaluesIF::RETURN_OK;
+    return returnvalue::OK;
   } else {
     return CommandMessage::UNKNOWN_COMMAND;
   }
@@ -21,7 +21,7 @@ ReturnValue_t ActionHelper::handleActionMessage(CommandMessage* command) {
 ReturnValue_t ActionHelper::initialize(MessageQueueIF* queueToUse_) {
   ipcStore = ObjectManager::instance()->get<StorageManagerIF>(objects::IPC_STORE);
   if (ipcStore == nullptr) {
-    return HasReturnvaluesIF::RETURN_FAILED;
+    return returnvalue::FAILED;
   }
   if (queueToUse_ != nullptr) {
     setQueueToUse(queueToUse_);
@@ -35,10 +35,10 @@ ReturnValue_t ActionHelper::initialize(MessageQueueIF* queueToUse_) {
     sif::printWarning("ActionHelper::initialize: No queue set\n");
 #endif
 #endif /* FSFW_VERBOSE_LEVEL >= 1 */
-    return HasReturnvaluesIF::RETURN_FAILED;
+    return returnvalue::FAILED;
   }
 
-  return HasReturnvaluesIF::RETURN_OK;
+  return returnvalue::OK;
 }
 
 void ActionHelper::step(uint8_t step, MessageQueueId_t reportTo, ActionId_t commandId,
@@ -62,7 +62,7 @@ void ActionHelper::prepareExecution(MessageQueueId_t commandedBy, ActionId_t act
   const uint8_t* dataPtr = nullptr;
   size_t size = 0;
   ReturnValue_t result = ipcStore->getData(dataAddress, &dataPtr, &size);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     CommandMessage reply;
     ActionMessage::setStepReply(&reply, actionId, 0, result);
     queueToUse->sendMessage(commandedBy, &reply);
@@ -75,7 +75,7 @@ void ActionHelper::prepareExecution(MessageQueueId_t commandedBy, ActionId_t act
     ActionMessage::setCompletionReply(&reply, actionId, true, result);
     queueToUse->sendMessage(commandedBy, &reply);
   }
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     CommandMessage reply;
     ActionMessage::setStepReply(&reply, actionId, 0, result);
     queueToUse->sendMessage(commandedBy, &reply);
@@ -91,11 +91,11 @@ ReturnValue_t ActionHelper::reportData(MessageQueueId_t reportTo, ActionId_t rep
   size_t maxSize = data->getSerializedSize();
   if (maxSize == 0) {
     /* No error, there's simply nothing to report. */
-    return HasReturnvaluesIF::RETURN_OK;
+    return returnvalue::OK;
   }
   size_t size = 0;
   ReturnValue_t result = ipcStore->getFreeElement(&storeAddress, maxSize, &dataPtr);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
     sif::warning << "ActionHelper::reportData: Getting free element from IPC store failed!"
                  << std::endl;
@@ -107,7 +107,7 @@ ReturnValue_t ActionHelper::reportData(MessageQueueId_t reportTo, ActionId_t rep
     return result;
   }
   result = data->serialize(&dataPtr, &size, maxSize, SerializeIF::Endianness::BIG);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     ipcStore->deleteData(storeAddress);
     return result;
   }
@@ -124,7 +124,7 @@ ReturnValue_t ActionHelper::reportData(MessageQueueId_t reportTo, ActionId_t rep
     result = queueToUse->sendMessage(reportTo, &reply);
   }
 
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     ipcStore->deleteData(storeAddress);
   }
   return result;
@@ -137,7 +137,7 @@ ReturnValue_t ActionHelper::reportData(MessageQueueId_t reportTo, ActionId_t rep
   CommandMessage reply;
   store_address_t storeAddress;
   ReturnValue_t result = ipcStore->addData(&storeAddress, data, dataSize);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
     sif::warning << "ActionHelper::reportData: Adding data to IPC store failed!" << std::endl;
 #else
@@ -158,7 +158,7 @@ ReturnValue_t ActionHelper::reportData(MessageQueueId_t reportTo, ActionId_t rep
     result = queueToUse->sendMessage(reportTo, &reply);
   }
 
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     ipcStore->deleteData(storeAddress);
   }
   return result;

src/fsfw/action/ActionHelper.h

@@ -36,7 +36,7 @@ class ActionHelper {
    * send to the sender of the message automatically.
    *
    * @param command Pointer to a command message received by the owner
-   * @return HasReturnvaluesIF::RETURN_OK if the message is a action message,
+   * @return returnvalue::OK if the message is a action message,
    *         CommandMessage::UNKNOW_COMMAND if this message ID is unkown
    */
   ReturnValue_t handleActionMessage(CommandMessage* command);
@@ -45,7 +45,7 @@ class ActionHelper {
    * helper function
    * @param queueToUse_   Pointer to the messageQueue to be used, optional
    *                      if queue was set in constructor
-   * @return Returns RETURN_OK if successful
+   * @return Returns returnvalue::OK if successful
    */
   ReturnValue_t initialize(MessageQueueIF* queueToUse_ = nullptr);
   /**
@@ -58,7 +58,7 @@ class ActionHelper {
    * @param result Result of the execution
    */
   void step(uint8_t step, MessageQueueId_t reportTo, ActionId_t commandId,
-            ReturnValue_t result = HasReturnvaluesIF::RETURN_OK);
+            ReturnValue_t result = returnvalue::OK);
   /**
    * Function to be called by the owner to send a action completion message
    * @param success   Specify whether action was completed successfully or not.
@@ -67,7 +67,7 @@ class ActionHelper {
    * @param result Result of the execution
    */
   void finish(bool success, MessageQueueId_t reportTo, ActionId_t commandId,
-              ReturnValue_t result = HasReturnvaluesIF::RETURN_OK);
+              ReturnValue_t result = returnvalue::OK);
   /**
    * Function to be called by the owner if an action does report data.
    * Takes a SerializeIF* pointer and serializes it into the IPC store.
@@ -75,7 +75,7 @@ class ActionHelper {
    *                  message to
    * @param replyId ID of the executed command
    * @param data Pointer to the data
-   * @return Returns RETURN_OK if successful, otherwise failure code
+   * @return Returns returnvalue::OK if successful, otherwise failure code
    */
   ReturnValue_t reportData(MessageQueueId_t reportTo, ActionId_t replyId, SerializeIF* data,
                            bool hideSender = false);
@@ -86,7 +86,7 @@ class ActionHelper {
    *                  message to
    * @param replyId ID of the executed command
    * @param data Pointer to the data
-   * @return Returns RETURN_OK if successful, otherwise failure code
+   * @return Returns returnvalue::OK if successful, otherwise failure code
    */
   ReturnValue_t reportData(MessageQueueId_t reportTo, ActionId_t replyId, const uint8_t* data,
                            size_t dataSize, bool hideSender = false);

src/fsfw/action/ActionMessage.cpp

@@ -25,7 +25,7 @@ store_address_t ActionMessage::getStoreId(const CommandMessage* message) {
 
 void ActionMessage::setStepReply(CommandMessage* message, ActionId_t fid, uint8_t step,
                                  ReturnValue_t result) {
-  if (result == HasReturnvaluesIF::RETURN_OK) {
+  if (result == returnvalue::OK) {
     message->setCommand(STEP_SUCCESS);
   } else {
     message->setCommand(STEP_FAILED);

src/fsfw/action/ActionMessage.h

@@ -33,12 +33,12 @@ class ActionMessage {
   static store_address_t getStoreId(const CommandMessage* message);
 
   static void setStepReply(CommandMessage* message, ActionId_t fid, uint8_t step,
-                           ReturnValue_t result = HasReturnvaluesIF::RETURN_OK);
+                           ReturnValue_t result = returnvalue::OK);
   static uint8_t getStep(const CommandMessage* message);
   static ReturnValue_t getReturnCode(const CommandMessage* message);
   static void setDataReply(CommandMessage* message, ActionId_t actionId, store_address_t data);
   static void setCompletionReply(CommandMessage* message, ActionId_t fid, bool success,
-                                 ReturnValue_t result = HasReturnvaluesIF::RETURN_OK);
+                                 ReturnValue_t result = returnvalue::OK);
 
   static void clear(CommandMessage* message);
 };

src/fsfw/action/CommandActionHelper.cpp

@@ -16,12 +16,12 @@ ReturnValue_t CommandActionHelper::commandAction(object_id_t commandTo, ActionId
   uint8_t *storePointer;
   size_t maxSize = data->getSerializedSize();
   ReturnValue_t result = ipcStore->getFreeElement(&storeId, maxSize, &storePointer);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     return result;
   }
   size_t size = 0;
   result = data->serialize(&storePointer, &size, maxSize, SerializeIF::Endianness::BIG);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     return result;
   }
   return sendCommand(receiver->getCommandQueue(), actionId, storeId);
@@ -35,7 +35,7 @@ ReturnValue_t CommandActionHelper::commandAction(object_id_t commandTo, ActionId
   }
   store_address_t storeId;
   ReturnValue_t result = ipcStore->addData(&storeId, data, size);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     return result;
   }
   return sendCommand(receiver->getCommandQueue(), actionId, storeId);
@@ -46,7 +46,7 @@ ReturnValue_t CommandActionHelper::sendCommand(MessageQueueId_t queueId, ActionI
   CommandMessage command;
   ActionMessage::setCommand(&command, actionId, storeId);
   ReturnValue_t result = queueToUse->sendMessage(queueId, &command);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     ipcStore->deleteData(storeId);
   }
   lastTarget = queueId;
@@ -57,44 +57,44 @@ ReturnValue_t CommandActionHelper::sendCommand(MessageQueueId_t queueId, ActionI
 ReturnValue_t CommandActionHelper::initialize() {
   ipcStore = ObjectManager::instance()->get<StorageManagerIF>(objects::IPC_STORE);
   if (ipcStore == nullptr) {
-    return HasReturnvaluesIF::RETURN_FAILED;
+    return returnvalue::FAILED;
   }
 
   queueToUse = owner->getCommandQueuePtr();
   if (queueToUse == nullptr) {
-    return HasReturnvaluesIF::RETURN_FAILED;
+    return returnvalue::FAILED;
   }
-  return HasReturnvaluesIF::RETURN_OK;
+  return returnvalue::OK;
 }
 
 ReturnValue_t CommandActionHelper::handleReply(CommandMessage *reply) {
   if (reply->getSender() != lastTarget) {
-    return HasReturnvaluesIF::RETURN_FAILED;
+    return returnvalue::FAILED;
   }
   switch (reply->getCommand()) {
     case ActionMessage::COMPLETION_SUCCESS:
       commandCount--;
       owner->completionSuccessfulReceived(ActionMessage::getActionId(reply));
-      return HasReturnvaluesIF::RETURN_OK;
+      return returnvalue::OK;
     case ActionMessage::COMPLETION_FAILED:
       commandCount--;
       owner->completionFailedReceived(ActionMessage::getActionId(reply),
                                       ActionMessage::getReturnCode(reply));
-      return HasReturnvaluesIF::RETURN_OK;
+      return returnvalue::OK;
     case ActionMessage::STEP_SUCCESS:
       owner->stepSuccessfulReceived(ActionMessage::getActionId(reply),
                                     ActionMessage::getStep(reply));
-      return HasReturnvaluesIF::RETURN_OK;
+      return returnvalue::OK;
     case ActionMessage::STEP_FAILED:
       commandCount--;
       owner->stepFailedReceived(ActionMessage::getActionId(reply), ActionMessage::getStep(reply),
                                 ActionMessage::getReturnCode(reply));
-      return HasReturnvaluesIF::RETURN_OK;
+      return returnvalue::OK;
     case ActionMessage::DATA_REPLY:
       extractDataForOwner(ActionMessage::getActionId(reply), ActionMessage::getStoreId(reply));
-      return HasReturnvaluesIF::RETURN_OK;
+      return returnvalue::OK;
     default:
-      return HasReturnvaluesIF::RETURN_FAILED;
+      return returnvalue::FAILED;
   }
 }
 
@@ -104,7 +104,7 @@ void CommandActionHelper::extractDataForOwner(ActionId_t actionId, store_address
   const uint8_t *data = nullptr;
   size_t size = 0;
   ReturnValue_t result = ipcStore->getData(storeId, &data, &size);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     return;
   }
   owner->dataReceived(actionId, data, size);

src/fsfw/action/CommandActionHelper.h

@@ -4,7 +4,7 @@
 #include "ActionMessage.h"
 #include "fsfw/ipc/MessageQueueIF.h"
 #include "fsfw/objectmanager/ObjectManagerIF.h"
-#include "fsfw/returnvalues/HasReturnvaluesIF.h"
+#include "fsfw/returnvalues/returnvalue.h"
 #include "fsfw/serialize/SerializeIF.h"
 #include "fsfw/storagemanager/StorageManagerIF.h"
 

src/fsfw/action/CommandsActionsIF.h

@@ -3,7 +3,7 @@
 
 #include "CommandActionHelper.h"
 #include "fsfw/ipc/MessageQueueIF.h"
-#include "fsfw/returnvalues/HasReturnvaluesIF.h"
+#include "fsfw/returnvalues/returnvalue.h"
 
 /**
  * Interface to separate commanding actions of other objects.

src/fsfw/action/HasActionsIF.h

@@ -5,7 +5,7 @@
 #include "ActionMessage.h"
 #include "SimpleActionHelper.h"
 #include "fsfw/ipc/MessageQueueIF.h"
-#include "fsfw/returnvalues/HasReturnvaluesIF.h"
+#include "fsfw/returnvalues/returnvalue.h"
 
 /**
  * @brief
@@ -53,7 +53,7 @@ class HasActionsIF {
    *
    * @return
    * -@c EXECUTION_FINISHED Finish reply will be generated
-   * -@c Not RETURN_OK Step failure reply will be generated
+   * -@c Not returnvalue::OK Step failure reply will be generated
    */
   virtual ReturnValue_t executeAction(ActionId_t actionId, MessageQueueId_t commandedBy,
                                       const uint8_t* data, size_t size) = 0;

src/fsfw/action/SimpleActionHelper.cpp

@@ -9,7 +9,7 @@ void SimpleActionHelper::step(ReturnValue_t result) {
   // STEP_OFFESET is subtracted to compensate for adding offset in base
   // method, which is not necessary here.
   ActionHelper::step(stepCount - STEP_OFFSET, lastCommander, lastAction, result);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     resetHelper();
   }
 }
@@ -41,7 +41,7 @@ void SimpleActionHelper::prepareExecution(MessageQueueId_t commandedBy, ActionId
   const uint8_t* dataPtr = nullptr;
   size_t size = 0;
   ReturnValue_t result = ipcStore->getData(dataAddress, &dataPtr, &size);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     ActionMessage::setStepReply(&reply, actionId, 0, result);
     queueToUse->sendMessage(commandedBy, &reply);
     return;
@@ -51,12 +51,12 @@ void SimpleActionHelper::prepareExecution(MessageQueueId_t commandedBy, ActionId
   result = owner->executeAction(actionId, commandedBy, dataPtr, size);
   ipcStore->deleteData(dataAddress);
   switch (result) {
-    case HasReturnvaluesIF::RETURN_OK:
+    case returnvalue::OK:
       isExecuting = true;
       stepCount++;
       break;
     case HasActionsIF::EXECUTION_FINISHED:
-      ActionMessage::setCompletionReply(&reply, actionId, true, HasReturnvaluesIF::RETURN_OK);
+      ActionMessage::setCompletionReply(&reply, actionId, true, returnvalue::OK);
       queueToUse->sendMessage(commandedBy, &reply);
       break;
     default:

src/fsfw/action/SimpleActionHelper.h

@@ -12,8 +12,8 @@ class SimpleActionHelper : public ActionHelper {
  public:
   SimpleActionHelper(HasActionsIF* setOwner, MessageQueueIF* useThisQueue);
   ~SimpleActionHelper() override;
-  void step(ReturnValue_t result = HasReturnvaluesIF::RETURN_OK);
-  void finish(ReturnValue_t result = HasReturnvaluesIF::RETURN_OK);
+  void step(ReturnValue_t result = returnvalue::OK);
+  void finish(ReturnValue_t result = returnvalue::OK);
   ReturnValue_t reportData(SerializeIF* data);
 
  protected:

src/fsfw/cfdp.h

@@ -0,0 +1,11 @@
+#ifndef FSFW_CFDP_H
+#define FSFW_CFDP_H
+
+#include "cfdp/definitions.h"
+#include "cfdp/handler/DestHandler.h"
+#include "cfdp/handler/FaultHandlerBase.h"
+#include "cfdp/tlv/Lv.h"
+#include "cfdp/tlv/StringLv.h"
+#include "cfdp/tlv/Tlv.h"
+
+#endif  // FSFW_CFDP_H

src/fsfw/cfdp/CFDPHandler.cpp

@@ -1,57 +0,0 @@
-#include "fsfw/cfdp/CFDPHandler.h"
-
-#include "fsfw/cfdp/CFDPMessage.h"
-#include "fsfw/ipc/CommandMessage.h"
-#include "fsfw/ipc/QueueFactory.h"
-#include "fsfw/objectmanager/ObjectManager.h"
-#include "fsfw/storagemanager/storeAddress.h"
-#include "fsfw/tmtcservices/AcceptsTelemetryIF.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

@@ -1,63 +0,0 @@
-#ifndef FSFW_CFDP_CFDPHANDLER_H_
-#define FSFW_CFDP_CFDPHANDLER_H_
-
-#include "fsfw/ipc/MessageQueueIF.h"
-#include "fsfw/objectmanager/SystemObject.h"
-#include "fsfw/returnvalues/HasReturnvaluesIF.h"
-#include "fsfw/tasks/ExecutableObjectIF.h"
-#include "fsfw/tcdistribution/CFDPDistributor.h"
-#include "fsfw/tmtcservices/AcceptsTelecommandsIF.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

@@ -1,17 +0,0 @@
-#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/CMakeLists.txt

@@ -1,4 +1,6 @@
-target_sources(${LIB_FSFW_NAME} PRIVATE CFDPHandler.cpp CFDPMessage.cpp)
+target_sources(${LIB_FSFW_NAME} PRIVATE CfdpMessage.cpp CfdpDistributor.cpp
+                                        VarLenFields.cpp)
 
 add_subdirectory(pdu)
 add_subdirectory(tlv)
+add_subdirectory(handler)

src/fsfw/cfdp/CfdpDistributor.cpp

@@ -0,0 +1,54 @@
+#include "CfdpDistributor.h"
+
+#include "fsfw/tcdistribution/definitions.h"
+
+CfdpDistributor::CfdpDistributor(CfdpDistribCfg cfg)
+    : TcDistributorBase(cfg.objectId, cfg.tcQueue), cfg(cfg) {}
+
+ReturnValue_t CfdpDistributor::registerTcDestination(const cfdp::EntityId& address,
+                                                     AcceptsTelecommandsIF& tcDest) {
+  for (const auto& dest : tcDestinations) {
+    if (dest.id == address) {
+      return returnvalue::FAILED;
+    }
+  }
+  tcDestinations.emplace_back(address, tcDest.getName(), tcDest.getRequestQueue());
+  return returnvalue::OK;
+}
+
+ReturnValue_t CfdpDistributor::selectDestination(MessageQueueId_t& destId) {
+  auto accessorPair = cfg.tcStore.getData(currentMessage.getStorageId());
+  if (accessorPair.first != returnvalue::OK) {
+    return accessorPair.first;
+  }
+  ReturnValue_t result = pduReader.setData(accessorPair.second.data(), accessorPair.second.size());
+  if (result != returnvalue::OK) {
+    return result;
+  }
+  result = pduReader.parseData();
+  if (result != returnvalue::OK) {
+    return result;
+  }
+  cfdp::EntityId foundId;
+  pduReader.getDestId(foundId);
+  bool destFound = false;
+  for (const auto& dest : tcDestinations) {
+    if (dest.id == foundId) {
+      destId = dest.queueId;
+      destFound = true;
+    }
+  }
+  if (not destFound) {
+    // TODO: Warning and event?
+    return tmtcdistrib::NO_DESTINATION_FOUND;
+  }
+  // Packet was forwarded successfully, so do not delete it.
+  accessorPair.second.release();
+  return returnvalue::OK;
+}
+
+const char* CfdpDistributor::getName() const { return "CFDP Distributor"; }
+
+uint32_t CfdpDistributor::getIdentifier() const { return 0; }
+
+MessageQueueId_t CfdpDistributor::getRequestQueue() const { return tcQueue->getId(); }

src/fsfw/cfdp/CfdpDistributor.h

@@ -0,0 +1,76 @@
+#ifndef FSFW_TCDISTRIBUTION_CFDPDISTRIBUTOR_H_
+#define FSFW_TCDISTRIBUTION_CFDPDISTRIBUTOR_H_
+
+#include <utility>
+#include <vector>
+
+#include "fsfw/cfdp/pdu/HeaderReader.h"
+#include "fsfw/returnvalues/returnvalue.h"
+#include "fsfw/tcdistribution/CfdpPacketChecker.h"
+#include "fsfw/tcdistribution/TcDistributorBase.h"
+#include "fsfw/tmtcpacket/cfdp/CfdpPacketStored.h"
+#include "fsfw/tmtcservices/AcceptsTelecommandsIF.h"
+#include "fsfw/tmtcservices/VerificationReporter.h"
+
+struct CfdpDistribCfg {
+  CfdpDistribCfg(object_id_t objectId, StorageManagerIF& tcStore, MessageQueueIF* tcQueue)
+      : objectId(objectId), tcStore(tcStore), tcQueue(tcQueue) {}
+
+  object_id_t objectId;
+  StorageManagerIF& tcStore;
+  MessageQueueIF* tcQueue;
+};
+
+/**
+ * This will be the primary component to perform PDU forwading procedures. This includes forwarding
+ * CFDP TC packets to registered source or destination handlers, and forwarding all telemetry
+ * generated by them to registered TM sinks.
+ * @ingroup tc_distribution
+ */
+class CfdpDistributor : public TcDistributorBase, public AcceptsTelecommandsIF {
+ public:
+  /**
+   * The ctor passes @c set_apid to the checker class and calls the
+   * TcDistribution ctor with a certain object id.
+   * @param setApid The APID of this receiving Application.
+   * @param setObjectId Object ID of the distributor itself
+   * @param setPacketSource Object ID of the source of TC packets.
+   * Must implement CcsdsDistributorIF.
+   */
+  explicit CfdpDistributor(CfdpDistribCfg cfg);
+
+  [[nodiscard]] const char* getName() const override;
+  [[nodiscard]] uint32_t getIdentifier() const override;
+  [[nodiscard]] MessageQueueId_t getRequestQueue() const override;
+
+  /**
+   * Register a new CFDP entity which can receive PDUs.
+   * @param address
+   * @param tcDest
+   * @return
+   *  - @c RETURN_FAILED: Entry already exists for the given address
+   */
+  ReturnValue_t registerTcDestination(const cfdp::EntityId& address, AcceptsTelecommandsIF& tcDest);
+
+ protected:
+  struct EntityInfo {
+    EntityInfo(cfdp::EntityId id, const char* name, MessageQueueId_t queueId)
+        : id(std::move(id)), name(name), queueId(queueId) {}
+    cfdp::EntityId id;
+    const char* name;
+    MessageQueueId_t queueId;
+  };
+  HeaderReader pduReader;
+  ReturnValue_t lastTcError = returnvalue::OK;
+  ReturnValue_t lastTmError = returnvalue::OK;
+  // I don't think a regular OBSW will have more than 1 or 2 of these destinations, so I think
+  // it is okay to accept the overhead here
+  std::vector<EntityInfo> tcDestinations;
+  CfdpDistribCfg cfg;
+
+  ReturnValue_t selectDestination(MessageQueueId_t& destId) override;
+
+ private:
+};
+
+#endif /* FSFW_TCDISTRIBUTION_CFDPDISTRIBUTOR_H_ */

src/fsfw/cfdp/CfdpHandler.cpp

@@ -0,0 +1,54 @@
+//#include "fsfw/cfdp/CfdpHandler.h"
+//
+//#include "fsfw/cfdp/CfdpMessage.h"
+//#include "fsfw/ipc/CommandMessage.h"
+//#include "fsfw/ipc/QueueFactory.h"
+//#include "fsfw/objectmanager/ObjectManager.h"
+//#include "fsfw/storagemanager/storeAddress.h"
+//#include "fsfw/tmtcservices/AcceptsTelemetryIF.h"
+//
+// CfdpHandler::CfdpHandler(object_id_t setObjectId, CfdpHandler* dist)
+//    : SystemObject(setObjectId) {
+//  requestQueue = QueueFactory::instance()->createMessageQueue(CFDP_HANDLER_MAX_RECEPTION);
+//  distributor = dist;
+//}
+//
+// CfdpHandler::~CfdpHandler() = default;
+//
+// 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;
+//}
+//
+// uint32_t CfdpHandler::getIdentifier() const { return 0; }
+//
+// MessageQueueId_t CfdpHandler::getRequestQueue() const { return this->requestQueue->getId(); }

src/fsfw/cfdp/CfdpHandler.h

@@ -0,0 +1,63 @@
+//#ifndef FSFW_CFDP_CFDPHANDLER_H_
+//#define FSFW_CFDP_CFDPHANDLER_H_
+//
+//#include "fsfw/ipc/MessageQueueIF.h"
+//#include "fsfw/objectmanager/SystemObject.h"
+//#include "fsfw/returnvalues/HasReturnvaluesIF.h"
+//#include "fsfw/storagemanager/storeAddress.h"
+//#include "fsfw/tasks/ExecutableObjectIF.h"
+//#include "fsfw/tmtcservices/AcceptsTelecommandsIF.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, CfdpHandler* distributor);
+//  /**
+//   * The destructor is empty.
+//   */
+//  virtual ~CfdpHandler();
+//
+//  virtual ReturnValue_t handleRequest(store_address_t storeId);
+//
+//  virtual ReturnValue_t initialize() override;
+//  virtual uint32_t getIdentifier() const override;
+//  MessageQueueId_t getRequestQueue() const 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;
+//
+//  CfdpHandler* 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 +1,17 @@
+#include "CfdpMessage.h"
+
+CfdpMessage::CfdpMessage() = default;
+
+CfdpMessage::~CfdpMessage() = default;
+
+void CfdpMessage::setCommand(CommandMessage *message, store_address_t cfdpPacket) {
+  message->setParameter(cfdpPacket.raw);
+}
+
+store_address_t CfdpMessage::getStoreId(const CommandMessage *message) {
+  store_address_t storeId;
+  storeId = static_cast<store_address_t>(message->getParameter());
+  return storeId;
+}
+
+void CfdpMessage::clear(CommandMessage *message) {}

src/fsfw/cfdp/CfdpMessage.h

@@ -5,14 +5,14 @@
 #include "fsfw/objectmanager/ObjectManagerIF.h"
 #include "fsfw/storagemanager/StorageManagerIF.h"
 
-class CFDPMessage {
+class CfdpMessage {
  private:
-  CFDPMessage();
+  CfdpMessage();
 
  public:
   static const uint8_t MESSAGE_ID = messagetypes::CFDP;
 
-  virtual ~CFDPMessage();
+  virtual ~CfdpMessage();
   static void setCommand(CommandMessage* message, store_address_t cfdpPacket);
 
   static store_address_t getStoreId(const CommandMessage* message);

src/fsfw/cfdp/FileSize.h

@@ -1,5 +1,7 @@
-#ifndef FSFW_SRC_FSFW_CFDP_FILESIZE_H_
-#define FSFW_SRC_FSFW_CFDP_FILESIZE_H_
+#ifndef FSFW_CFDP_FILESIZE_H_
+#define FSFW_CFDP_FILESIZE_H_
+
+#include <optional>
 
 #include "fsfw/serialize/SerializeAdapter.h"
 #include "fsfw/serialize/SerializeIF.h"
@@ -8,9 +10,11 @@ namespace cfdp {
 
 struct FileSize : public SerializeIF {
  public:
-  FileSize() : largeFile(false){};
+  FileSize() = default;
 
-  FileSize(uint64_t fileSize, bool isLarge = false) { setFileSize(fileSize, isLarge); };
+  explicit FileSize(uint64_t fileSize, bool isLarge = false) { setFileSize(fileSize, isLarge); };
+
+  [[nodiscard]] uint64_t value() const { return fileSize; }
 
   ReturnValue_t serialize(bool isLarge, uint8_t **buffer, size_t *size, size_t maxSize,
                           Endianness streamEndianness) {
@@ -27,7 +31,7 @@ struct FileSize : public SerializeIF {
     return SerializeAdapter::serialize(&fileSize, buffer, size, maxSize, streamEndianness);
   }
 
-  size_t getSerializedSize() const override {
+  [[nodiscard]] size_t getSerializedSize() const override {
     if (largeFile) {
       return 8;
     } else {
@@ -43,27 +47,29 @@ struct FileSize : public SerializeIF {
       uint32_t sizeTmp = 0;
       ReturnValue_t result =
           SerializeAdapter::deSerialize(&sizeTmp, buffer, size, streamEndianness);
-      if (result == HasReturnvaluesIF::RETURN_OK) {
+      if (result == returnvalue::OK) {
         fileSize = sizeTmp;
       }
       return result;
     }
   }
 
-  ReturnValue_t setFileSize(uint64_t fileSize, bool largeFile) {
+  ReturnValue_t setFileSize(uint64_t fileSize_, std::optional<bool> largeFile_) {
+    if (largeFile_) {
+      largeFile = largeFile_.value();
+    }
     if (not largeFile and fileSize > UINT32_MAX) {
       // TODO: emit warning here
-      return HasReturnvaluesIF::RETURN_FAILED;
+      return returnvalue::FAILED;
     }
-    this->fileSize = fileSize;
-    this->largeFile = largeFile;
-    return HasReturnvaluesIF::RETURN_OK;
+    this->fileSize = fileSize_;
+    return returnvalue::OK;
   }
 
-  bool isLargeFile() const { return largeFile; }
-  uint64_t getSize(bool *largeFile = nullptr) const {
-    if (largeFile != nullptr) {
-      *largeFile = this->largeFile;
+  [[nodiscard]] bool isLargeFile() const { return largeFile; }
+  uint64_t getSize(bool *largeFile_ = nullptr) const {
+    if (largeFile_ != nullptr) {
+      *largeFile_ = this->largeFile;
     }
     return fileSize;
   }
@@ -75,4 +81,4 @@ struct FileSize : public SerializeIF {
 
 }  // namespace cfdp
 
-#endif /* FSFW_SRC_FSFW_CFDP_FILESIZE_H_ */
+#endif /* FSFW_CFDP_FILESIZE_H_ */

src/fsfw/cfdp/VarLenFields.cpp

@@ -1,12 +1,11 @@
-#include "VarLenField.h"
+#include "VarLenFields.h"
 
-#include "fsfw/FSFW.h"
 #include "fsfw/serialize/SerializeAdapter.h"
 #include "fsfw/serviceinterface.h"
 
 cfdp::VarLenField::VarLenField(cfdp::WidthInBytes width, size_t value) : VarLenField() {
   ReturnValue_t result = this->setValue(width, value);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
 #if FSFW_DISABLE_PRINTOUT == 0
 #if FSFW_CPP_OSTREAM_ENABLED == 1
     sif::warning << "cfdp::VarLenField: Setting value failed" << std::endl;
@@ -21,27 +20,27 @@ cfdp::VarLenField::VarLenField() : width(cfdp::WidthInBytes::ONE_BYTE) { value.o
 
 cfdp::WidthInBytes cfdp::VarLenField::getWidth() const { return width; }
 
-ReturnValue_t cfdp::VarLenField::setValue(cfdp::WidthInBytes widthInBytes, size_t value) {
+ReturnValue_t cfdp::VarLenField::setValue(cfdp::WidthInBytes widthInBytes, size_t value_) {
   switch (widthInBytes) {
     case (cfdp::WidthInBytes::ONE_BYTE): {
-      if (value > UINT8_MAX) {
-        return HasReturnvaluesIF::RETURN_FAILED;
+      if (value_ > UINT8_MAX) {
+        return returnvalue::FAILED;
       }
-      this->value.oneByte = value;
+      this->value.oneByte = value_;
       break;
     }
     case (cfdp::WidthInBytes::TWO_BYTES): {
-      if (value > UINT16_MAX) {
-        return HasReturnvaluesIF::RETURN_FAILED;
+      if (value_ > UINT16_MAX) {
+        return returnvalue::FAILED;
       }
-      this->value.twoBytes = value;
+      this->value.twoBytes = value_;
       break;
     }
     case (cfdp::WidthInBytes::FOUR_BYTES): {
-      if (value > UINT32_MAX) {
-        return HasReturnvaluesIF::RETURN_FAILED;
+      if (value_ > UINT32_MAX) {
+        return returnvalue::FAILED;
       }
-      this->value.fourBytes = value;
+      this->value.fourBytes = value_;
       break;
     }
     default: {
@@ -49,7 +48,7 @@ ReturnValue_t cfdp::VarLenField::setValue(cfdp::WidthInBytes widthInBytes, size_
     }
   }
   this->width = widthInBytes;
-  return HasReturnvaluesIF::RETURN_OK;
+  return returnvalue::OK;
 }
 
 size_t cfdp::VarLenField::getValue() const {
@@ -77,7 +76,7 @@ ReturnValue_t cfdp::VarLenField::serialize(uint8_t **buffer, size_t *size, size_
       **buffer = value.oneByte;
       *size += 1;
       *buffer += 1;
-      return HasReturnvaluesIF::RETURN_OK;
+      return returnvalue::OK;
     }
     case (cfdp::WidthInBytes::TWO_BYTES): {
       return SerializeAdapter::serialize(&value.twoBytes, buffer, size, maxSize, streamEndianness);
@@ -86,16 +85,16 @@ ReturnValue_t cfdp::VarLenField::serialize(uint8_t **buffer, size_t *size, size_
       return SerializeAdapter::serialize(&value.fourBytes, buffer, size, maxSize, streamEndianness);
     }
     default: {
-      return HasReturnvaluesIF::RETURN_FAILED;
+      return returnvalue::FAILED;
     }
   }
 }
 
 size_t cfdp::VarLenField::getSerializedSize() const { return width; }
 
-ReturnValue_t cfdp::VarLenField::deSerialize(cfdp::WidthInBytes width, const uint8_t **buffer,
+ReturnValue_t cfdp::VarLenField::deSerialize(cfdp::WidthInBytes width_, const uint8_t **buffer,
                                              size_t *size, Endianness streamEndianness) {
-  this->width = width;
+  this->width = width_;
   return deSerialize(buffer, size, streamEndianness);
 }
 
@@ -105,7 +104,7 @@ ReturnValue_t cfdp::VarLenField::deSerialize(const uint8_t **buffer, size_t *siz
     case (cfdp::WidthInBytes::ONE_BYTE): {
       value.oneByte = **buffer;
       *size += 1;
-      return HasReturnvaluesIF::RETURN_OK;
+      return returnvalue::OK;
     }
     case (cfdp::WidthInBytes::TWO_BYTES): {
       return SerializeAdapter::deSerialize(&value.twoBytes, buffer, size, streamEndianness);
@@ -114,7 +113,21 @@ ReturnValue_t cfdp::VarLenField::deSerialize(const uint8_t **buffer, size_t *siz
       return SerializeAdapter::deSerialize(&value.fourBytes, buffer, size, streamEndianness);
     }
     default: {
-      return HasReturnvaluesIF::RETURN_FAILED;
+      return returnvalue::FAILED;
     }
   }
 }
+
+bool cfdp::VarLenField::operator<(const cfdp::VarLenField &other) const {
+  if (getWidth() < other.getWidth()) {
+    return true;
+  } else if (getWidth() == other.getWidth()) {
+    return getValue() < other.getValue();
+  } else {
+    return false;
+  }
+}
+
+bool cfdp::VarLenField::operator==(const cfdp::VarLenField &other) const {
+  return getWidth() == other.getWidth() and getValue() == other.getValue();
+}

src/fsfw/cfdp/VarLenFields.h

@@ -0,0 +1,91 @@
+#ifndef FSFW_CFDP_PDU_VARLENFIELD_H_
+#define FSFW_CFDP_PDU_VARLENFIELD_H_
+
+#include <cstddef>
+#include <cstdint>
+#include <utility>
+
+#include "fsfw/cfdp/definitions.h"
+#include "fsfw/serialize/SerializeIF.h"
+#include "fsfw/util/UnsignedByteField.h"
+
+namespace cfdp {
+
+class VarLenField : public SerializeIF {
+ public:
+  union LengthFieldLen {
+    uint8_t oneByte;
+    uint16_t twoBytes;
+    uint32_t fourBytes;
+    uint64_t eightBytes;
+  };
+
+  VarLenField();
+  template <typename T>
+  explicit VarLenField(UnsignedByteField<T> byteField);
+
+  VarLenField(cfdp::WidthInBytes width, size_t value);
+
+  bool operator==(const VarLenField &other) const;
+  bool operator<(const VarLenField &other) const;
+
+  ReturnValue_t setValue(cfdp::WidthInBytes, size_t value);
+
+  ReturnValue_t serialize(uint8_t **buffer, size_t *size, size_t maxSize,
+                          Endianness streamEndianness) const override;
+
+  [[nodiscard]] size_t getSerializedSize() const override;
+
+  ReturnValue_t deSerialize(cfdp::WidthInBytes width, const uint8_t **buffer, size_t *size,
+                            Endianness streamEndianness);
+
+  [[nodiscard]] cfdp::WidthInBytes getWidth() const;
+  [[nodiscard]] size_t getValue() const;
+
+ private:
+  ReturnValue_t deSerialize(const uint8_t **buffer, size_t *size,
+                            Endianness streamEndianness) override;
+
+  cfdp::WidthInBytes width;
+  LengthFieldLen value{};
+};
+
+template <typename T>
+cfdp::VarLenField::VarLenField(UnsignedByteField<T> byteField)
+    : width(static_cast<cfdp::WidthInBytes>(sizeof(T))) {
+  static_assert((sizeof(T) % 2) == 0);
+  setValue(width, byteField.getValue());
+}
+
+struct EntityId : public VarLenField {
+ public:
+  EntityId() : VarLenField() {}
+  template <typename T>
+  explicit EntityId(UnsignedByteField<T> byteField) : VarLenField(byteField) {}
+  EntityId(cfdp::WidthInBytes width, size_t entityId) : VarLenField(width, entityId) {}
+};
+
+struct TransactionSeqNum : public VarLenField {
+ public:
+  TransactionSeqNum() : VarLenField() {}
+  template <typename T>
+  explicit TransactionSeqNum(UnsignedByteField<T> byteField) : VarLenField(byteField) {}
+  TransactionSeqNum(cfdp::WidthInBytes width, size_t seqNum) : VarLenField(width, seqNum) {}
+};
+
+struct TransactionId {
+  TransactionId() = default;
+  TransactionId(EntityId entityId, TransactionSeqNum seqNum)
+      : entityId(std::move(entityId)), seqNum(std::move(seqNum)) {}
+
+  bool operator==(const TransactionId &other) {
+    return entityId == other.entityId and seqNum == other.seqNum;
+  }
+
+  EntityId entityId;
+  TransactionSeqNum seqNum;
+};
+
+}  // namespace cfdp
+
+#endif /* FSFW_CFDP_PDU_VARLENFIELD_H_ */

src/fsfw/cfdp/definitions.h

@@ -7,36 +7,36 @@
 #include <cstdint>
 
 #include "fsfw/returnvalues/FwClassIds.h"
-#include "fsfw/returnvalues/HasReturnvaluesIF.h"
+#include "fsfw/returnvalues/returnvalue.h"
 
 namespace cfdp {
 
-static constexpr uint8_t VERSION_BITS = 0b00100000;
+static constexpr char CFDP_VERSION_2_NAME[] = "CCSDS 727.0-B-5";
+
+// Second version of the protocol, only this one is supported here
+static constexpr uint8_t CFDP_VERSION_2 = 0b001;
+static constexpr uint8_t VERSION_BITS = CFDP_VERSION_2 << 5;
 
 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_TLV_TYPE = returnvalue::makeCode(CFDP_CLASS_ID, 1);
+static constexpr ReturnValue_t INVALID_DIRECTIVE_FIELDS = returnvalue::makeCode(CFDP_CLASS_ID, 2);
+static constexpr ReturnValue_t INVALID_PDU_DATAFIELD_LEN = returnvalue::makeCode(CFDP_CLASS_ID, 3);
 static constexpr ReturnValue_t INVALID_ACK_DIRECTIVE_FIELDS =
-    HasReturnvaluesIF::makeReturnCode(CFDP_CLASS_ID, 4);
+    returnvalue::makeCode(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);
+    returnvalue::makeCode(CFDP_CLASS_ID, 5);
+static constexpr ReturnValue_t NAK_CANT_PARSE_OPTIONS = returnvalue::makeCode(CFDP_CLASS_ID, 6);
 static constexpr ReturnValue_t FINISHED_CANT_PARSE_FS_RESPONSES =
-    HasReturnvaluesIF::makeReturnCode(CFDP_CLASS_ID, 6);
+    returnvalue::makeCode(CFDP_CLASS_ID, 6);
 static constexpr ReturnValue_t FILESTORE_REQUIRES_SECOND_FILE =
-    HasReturnvaluesIF::makeReturnCode(CFDP_CLASS_ID, 8);
+    returnvalue::makeCode(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);
+    returnvalue::makeCode(CFDP_CLASS_ID, 9);
 
 //! Checksum types according to the SANA Checksum Types registry
 //! https://sanaregistry.org/r/checksum_identifiers/
@@ -49,17 +49,17 @@ enum ChecksumType {
   NULL_CHECKSUM = 15
 };
 
-enum PduType : bool { FILE_DIRECTIVE = 0, FILE_DATA = 1 };
+enum PduType : uint8_t { FILE_DIRECTIVE = 0, FILE_DATA = 1 };
 
-enum TransmissionModes : bool { ACKNOWLEDGED = 0, UNACKNOWLEDGED = 1 };
+enum TransmissionModes : uint8_t { ACKNOWLEDGED = 0, UNACKNOWLEDGED = 1 };
 
-enum SegmentMetadataFlag : bool { NOT_PRESENT = 0, PRESENT = 1 };
+enum SegmentMetadataFlag : bool { NOT_PRESENT = false, PRESENT = true };
 
-enum Direction : bool { TOWARDS_RECEIVER = 0, TOWARDS_SENDER = 1 };
+enum Direction : uint8_t { TOWARDS_RECEIVER = 0, TOWARDS_SENDER = 1 };
 
 enum SegmentationControl : bool {
-  NO_RECORD_BOUNDARIES_PRESERVATION = 0,
-  RECORD_BOUNDARIES_PRESERVATION = 1
+  NO_RECORD_BOUNDARIES_PRESERVATION = false,
+  RECORD_BOUNDARIES_PRESERVATION = true
 };
 
 enum WidthInBytes : uint8_t {
@@ -97,6 +97,14 @@ enum ConditionCode : uint8_t {
   CANCEL_REQUEST_RECEIVED = 0b1111
 };
 
+enum FaultHandlerCodes {
+  RESERVED = 0b0000,
+  NOTICE_OF_CANCELLATION = 0b0001,
+  NOTICE_OF_SUSPENSION = 0b0010,
+  IGNORE_ERROR = 0b0011,
+  ABANDON_TRANSACTION = 0b0100
+};
+
 enum AckTransactionStatus {
   UNDEFINED = 0b00,
   ACTIVE = 0b01,
@@ -104,16 +112,16 @@ enum AckTransactionStatus {
   UNRECOGNIZED = 0b11
 };
 
-enum FinishedDeliveryCode { DATA_COMPLETE = 0, DATA_INCOMPLETE = 1 };
+enum FileDeliveryCode { DATA_COMPLETE = 0, DATA_INCOMPLETE = 1 };
 
-enum FinishedFileStatus {
+enum FileDeliveryStatus {
   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 PromptResponseRequired : uint8_t { PROMPT_NAK = 0, PROMPT_KEEP_ALIVE = 1 };
 
 enum TlvTypes : uint8_t {
   FILESTORE_REQUEST = 0x00,

src/fsfw/cfdp/handler/CMakeLists.txt

@@ -0,0 +1,2 @@
+target_sources(${LIB_FSFW_NAME} PRIVATE SourceHandler.cpp DestHandler.cpp
+                                        FaultHandlerBase.cpp UserBase.cpp)

src/fsfw/cfdp/handler/DestHandler.cpp

@@ -0,0 +1,289 @@
+#include "DestHandler.h"
+
+#include <utility>
+
+#include "fsfw/FSFW.h"
+#include "fsfw/cfdp/pdu/EofPduReader.h"
+#include "fsfw/cfdp/pdu/FileDataReader.h"
+#include "fsfw/cfdp/pdu/HeaderReader.h"
+#include "fsfw/objectmanager.h"
+
+using namespace returnvalue;
+
+cfdp::DestHandler::DestHandler(DestHandlerParams params, FsfwParams fsfwParams)
+    : tlvVec(params.maxTlvsInOnePdu),
+      userTlvVec(params.maxTlvsInOnePdu),
+      dp(std::move(params)),
+      fp(fsfwParams),
+      tp(params.maxFilenameLen) {
+  tp.pduConf.direction = cfdp::Direction::TOWARDS_SENDER;
+}
+
+ReturnValue_t cfdp::DestHandler::performStateMachine() {
+  ReturnValue_t result;
+  ReturnValue_t status = returnvalue::OK;
+  if (step == TransactionStep::IDLE) {
+    for (auto infoIter = dp.packetListRef.begin(); infoIter != dp.packetListRef.end();) {
+      if (infoIter->pduType == PduType::FILE_DIRECTIVE and
+          infoIter->directiveType == FileDirectives::METADATA) {
+        result = handleMetadataPdu(*infoIter);
+        if (result != OK) {
+          status = result;
+        }
+        // Store data was deleted in PDU handler because a store guard is used
+        dp.packetListRef.erase(infoIter++);
+      }
+    }
+    if (step == TransactionStep::IDLE) {
+      // To decrease the already high complexity of the software, all packets arriving before
+      // a metadata PDU are deleted.
+      for (auto infoIter = dp.packetListRef.begin(); infoIter != dp.packetListRef.end();) {
+        fp.tcStore->deleteData(infoIter->storeId);
+      }
+      dp.packetListRef.clear();
+    }
+
+    if (step != TransactionStep::IDLE) {
+      return CALL_FSM_AGAIN;
+    }
+    return status;
+  }
+  if (cfdpState == CfdpStates::BUSY_CLASS_1_NACKED) {
+    if (step == TransactionStep::RECEIVING_FILE_DATA_PDUS) {
+      for (auto infoIter = dp.packetListRef.begin(); infoIter != dp.packetListRef.end();) {
+        if (infoIter->pduType == PduType::FILE_DATA) {
+          result = handleFileDataPdu(*infoIter);
+          if (result != OK) {
+            status = result;
+          }
+          // Store data was deleted in PDU handler because a store guard is used
+          dp.packetListRef.erase(infoIter++);
+        }
+        // TODO: Support for check timer missing
+        if (infoIter->pduType == PduType::FILE_DIRECTIVE and
+            infoIter->directiveType == FileDirectives::EOF_DIRECTIVE) {
+          result = handleEofPdu(*infoIter);
+          if (result != OK) {
+            status = result;
+          }
+          // Store data was deleted in PDU handler because a store guard is used
+          dp.packetListRef.erase(infoIter++);
+        }
+      }
+    }
+    if (step == TransactionStep::TRANSFER_COMPLETION) {
+    }
+    if (step == TransactionStep::SENDING_FINISHED_PDU) {
+    }
+    return OK;
+  }
+  if (cfdpState == CfdpStates::BUSY_CLASS_2_ACKED) {
+    // TODO: Will be implemented at a later stage
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+    sif::warning << "CFDP state machine for acknowledged mode not implemented yet" << std::endl;
+#endif
+  }
+  return OK;
+}
+
+ReturnValue_t cfdp::DestHandler::passPacket(PacketInfo packet) {
+  if (dp.packetListRef.full()) {
+    return FAILED;
+  }
+  dp.packetListRef.push_back(packet);
+  return OK;
+}
+
+ReturnValue_t cfdp::DestHandler::initialize() {
+  if (fp.tmStore == nullptr) {
+    fp.tmStore = ObjectManager::instance()->get<StorageManagerIF>(objects::TM_STORE);
+    if (fp.tmStore == nullptr) {
+      return FAILED;
+    }
+  }
+
+  if (fp.tcStore == nullptr) {
+    fp.tcStore = ObjectManager::instance()->get<StorageManagerIF>(objects::TC_STORE);
+    if (fp.tcStore == nullptr) {
+      return FAILED;
+    }
+  }
+  return OK;
+}
+
+ReturnValue_t cfdp::DestHandler::handleMetadataPdu(const PacketInfo& info) {
+  // Process metadata PDU
+  auto constAccessorPair = fp.tcStore->getData(info.storeId);
+  if (constAccessorPair.first != OK) {
+    // TODO: This is not a CFDP error. Event and/or warning?
+    return constAccessorPair.first;
+  }
+  cfdp::StringLv sourceFileName;
+  cfdp::StringLv destFileName;
+  MetadataInfo metadataInfo(tp.fileSize, sourceFileName, destFileName);
+  cfdp::Tlv* tlvArrayAsPtr = tlvVec.data();
+  metadataInfo.setOptionsArray(&tlvArrayAsPtr, std::nullopt, tlvVec.size());
+  MetadataPduReader reader(constAccessorPair.second.data(), constAccessorPair.second.size(),
+                           metadataInfo);
+  ReturnValue_t result = reader.parseData();
+  // TODO: The standard does not really specify what happens if this kind of error happens
+  //       I think it might be a good idea to cache some sort of error code, which
+  //       is translated into a warning and/or event by an upper layer
+  if (result != OK) {
+    return handleMetadataParseError(constAccessorPair.second.data(),
+                                    constAccessorPair.second.size());
+  }
+  return startTransaction(reader, metadataInfo);
+}
+
+ReturnValue_t cfdp::DestHandler::handleFileDataPdu(const cfdp::PacketInfo& info) {
+  // Process file data PDU
+  auto constAccessorPair = fp.tcStore->getData(info.storeId);
+  if (constAccessorPair.first != OK) {
+    // TODO: This is not a CFDP error. Event and/or warning?
+    return constAccessorPair.first;
+  }
+  cfdp::FileSize offset;
+  FileDataInfo fdInfo(offset);
+  FileDataReader reader(constAccessorPair.second.data(), constAccessorPair.second.size(), fdInfo);
+  ReturnValue_t result = reader.parseData();
+  if (result != OK) {
+    return result;
+  }
+  size_t fileSegmentLen = 0;
+  const uint8_t* fileData = fdInfo.getFileData(&fileSegmentLen);
+  FileOpParams fileOpParams(tp.sourceName.data(), fileSegmentLen);
+  if (dp.cfg.indicCfg.fileSegmentRecvIndicRequired) {
+    FileSegmentRecvdParams segParams;
+    segParams.offset = offset.value();
+    segParams.id = tp.transactionId;
+    segParams.length = fileSegmentLen;
+    segParams.recContState = fdInfo.getRecordContinuationState();
+    size_t segmentMetadatLen = 0;
+    auto* segMetadata = fdInfo.getSegmentMetadata(&segmentMetadatLen);
+    segParams.segmentMetadata = {segMetadata, segmentMetadatLen};
+    dp.user.fileSegmentRecvdIndication(segParams);
+  }
+  result = dp.user.vfs.writeToFile(fileOpParams, fileData);
+  if (offset.value() + fileSegmentLen > tp.progress) {
+    tp.progress = offset.value() + fileSegmentLen;
+  }
+  if (result != returnvalue::OK) {
+    // TODO: Proper Error handling
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+    sif::error << "File write error" << std::endl;
+#endif
+  }
+  return result;
+}
+
+ReturnValue_t cfdp::DestHandler::handleEofPdu(const cfdp::PacketInfo& info) {
+  // Process EOF PDU
+  auto constAccessorPair = fp.tcStore->getData(info.storeId);
+  if (constAccessorPair.first != OK) {
+    // TODO: This is not a CFDP error. Event and/or warning?
+    return constAccessorPair.first;
+  }
+  EofInfo eofInfo(nullptr);
+  EofPduReader reader(constAccessorPair.second.data(), constAccessorPair.second.size(), eofInfo);
+  ReturnValue_t result = reader.parseData();
+  if (result != OK) {
+    return result;
+  }
+  // TODO: Error handling
+  if (eofInfo.getConditionCode() == ConditionCode::NO_ERROR) {
+    tp.crc = eofInfo.getChecksum();
+    uint64_t fileSizeFromEof = eofInfo.getFileSize().value();
+    // CFDP 4.6.1.2.9: Declare file size error if progress exceeds file size
+    if (fileSizeFromEof > tp.progress) {
+      // TODO: File size error
+    }
+    tp.fileSize.setFileSize(fileSizeFromEof, std::nullopt);
+  }
+  return returnvalue::OK;
+}
+
+ReturnValue_t cfdp::DestHandler::handleMetadataParseError(const uint8_t* rawData, size_t maxSize) {
+  // TODO: try to extract destination ID for error
+  // TODO: Invalid metadata PDU.
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+  sif::warning << "Parsing Metadata PDU failed with code " << result << std::endl;
+#else
+#endif
+  HeaderReader headerReader(rawData, maxSize);
+  ReturnValue_t result = headerReader.parseData();
+  if (result != OK) {
+    // TODO: Now this really should not happen. Warning or error,
+    //       yield or cache appropriate returnvalue
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+    sif::warning << "Parsing Header failed" << std::endl;
+#else
+#endif
+    // TODO: Trigger appropriate event
+    return result;
+  }
+  cfdp::EntityId destId;
+  headerReader.getDestId(destId);
+  RemoteEntityCfg* remoteCfg;
+  if (not dp.remoteCfgTable.getRemoteCfg(destId, &remoteCfg)) {
+// TODO: No remote config for dest ID. I consider this a configuration error.
+//       Warning or error, yield or cache appropriate returnvalue
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+    sif::warning << "No remote config exists for destination ID" << std::endl;
+#else
+#endif
+    // TODO: Trigger appropriate event
+  }
+  // TODO: Appropriate returnvalue?
+  return returnvalue::FAILED;
+}
+
+ReturnValue_t cfdp::DestHandler::startTransaction(MetadataPduReader& reader, MetadataInfo& info) {
+  if (cfdpState != CfdpStates::IDLE) {
+    // According to standard, discard metadata PDU if we are busy
+    return returnvalue::OK;
+  }
+  step = TransactionStep::TRANSACTION_START;
+  if (reader.getTransmissionMode() == TransmissionModes::UNACKNOWLEDGED) {
+    cfdpState = CfdpStates::BUSY_CLASS_1_NACKED;
+  } else if (reader.getTransmissionMode() == TransmissionModes::ACKNOWLEDGED) {
+    cfdpState = CfdpStates::BUSY_CLASS_2_ACKED;
+  }
+  tp.checksumType = info.getChecksumType();
+  tp.closureRequested = info.isClosureRequested();
+  size_t sourceNameSize = 0;
+  const uint8_t* sourceNamePtr = info.getSourceFileName().getValue(&sourceNameSize);
+  if (sourceNameSize > tp.sourceName.size()) {
+    // TODO: Warning, event etc.
+    return FAILED;
+  }
+  std::memcpy(tp.sourceName.data(), sourceNamePtr, sourceNameSize);
+  tp.sourceName[sourceNameSize] = '\0';
+  size_t destNameSize = 0;
+  const uint8_t* destNamePtr = info.getDestFileName().getValue(&destNameSize);
+  if (destNameSize > tp.destName.size()) {
+    // TODO: Warning, event etc.
+    return FAILED;
+  }
+  std::memcpy(tp.destName.data(), destNamePtr, destNameSize);
+  tp.destName[destNameSize] = '\0';
+  reader.fillConfig(tp.pduConf);
+  tp.pduConf.direction = Direction::TOWARDS_SENDER;
+  tp.transactionId.entityId = tp.pduConf.sourceId;
+  tp.transactionId.seqNum = tp.pduConf.seqNum;
+  if (not dp.remoteCfgTable.getRemoteCfg(tp.pduConf.destId, &tp.remoteCfg)) {
+    // TODO: Warning, event etc.
+    return FAILED;
+  }
+  step = TransactionStep::RECEIVING_FILE_DATA_PDUS;
+  MetadataRecvdParams params(tp.transactionId, tp.pduConf.sourceId);
+  params.fileSize = tp.fileSize.getSize();
+  params.destFileName = tp.destName.data();
+  params.sourceFileName = tp.sourceName.data();
+  params.msgsToUserArray = dynamic_cast<MessageToUserTlv*>(userTlvVec.data());
+  params.msgsToUserLen = info.getOptionsLen();
+  dp.user.metadataRecvdIndication(params);
+  return OK;
+}
+
+cfdp::CfdpStates cfdp::DestHandler::getCfdpState() const { return cfdpState; }

src/fsfw/cfdp/handler/DestHandler.h

@@ -0,0 +1,130 @@
+#ifndef FSFW_CFDP_CFDPDESTHANDLER_H
+#define FSFW_CFDP_CFDPDESTHANDLER_H
+
+#include <etl/list.h>
+#include <etl/set.h>
+
+#include <utility>
+
+#include "RemoteConfigTableIF.h"
+#include "UserBase.h"
+#include "defs.h"
+#include "fsfw/cfdp/handler/mib.h"
+#include "fsfw/cfdp/pdu/MetadataPduReader.h"
+#include "fsfw/cfdp/pdu/PduConfig.h"
+#include "fsfw/container/DynamicFIFO.h"
+#include "fsfw/storagemanager/StorageManagerIF.h"
+#include "fsfw/storagemanager/storeAddress.h"
+#include "fsfw/tmtcservices/AcceptsTelemetryIF.h"
+
+namespace cfdp {
+
+struct PacketInfo {
+  PacketInfo(PduType type, FileDirectives directive, store_address_t storeId)
+      : pduType(type), directiveType(directive), storeId(storeId) {}
+
+  PduType pduType = PduType::FILE_DATA;
+  FileDirectives directiveType = FileDirectives::INVALID_DIRECTIVE;
+  store_address_t storeId = store_address_t::invalid();
+  PacketInfo() = default;
+};
+
+struct DestHandlerParams {
+  DestHandlerParams(LocalEntityCfg cfg, UserBase& user, RemoteConfigTableIF& remoteCfgTable,
+                    etl::ilist<PacketInfo>& packetList,
+                    // TODO: This container can potentially take tons of space. For a better
+                    //       memory efficient implementation, an additional abstraction could be
+                    //       be used so users can use uint32_t as the pair type
+                    etl::iset<etl::pair<uint64_t, uint64_t>>& lostSegmentsContainer)
+      : cfg(std::move(cfg)),
+        user(user),
+        remoteCfgTable(remoteCfgTable),
+        packetListRef(packetList),
+        lostSegmentsContainer(lostSegmentsContainer) {}
+
+  LocalEntityCfg cfg;
+  UserBase& user;
+  RemoteConfigTableIF& remoteCfgTable;
+
+  etl::ilist<PacketInfo>& packetListRef;
+  etl::iset<etl::pair<uint64_t, uint64_t>>& lostSegmentsContainer;
+  uint8_t maxTlvsInOnePdu = 10;
+  size_t maxFilenameLen = 255;
+};
+
+struct FsfwParams {
+  FsfwParams(AcceptsTelemetryIF& packetDest, MessageQueueIF& msgQueue,
+             EventReportingProxyIF& eventReporter)
+      : packetDest(packetDest), msgQueue(msgQueue), eventReporter(eventReporter) {}
+  AcceptsTelemetryIF& packetDest;
+  MessageQueueIF& msgQueue;
+  EventReportingProxyIF& eventReporter;
+  StorageManagerIF* tcStore = nullptr;
+  StorageManagerIF* tmStore = nullptr;
+};
+
+class DestHandler {
+ public:
+  /**
+   * Will be returned if it is advisable to call the state machine operation call again
+   */
+  ReturnValue_t CALL_FSM_AGAIN = returnvalue::makeCode(1, 0);
+  explicit DestHandler(DestHandlerParams handlerParams, FsfwParams fsfwParams);
+
+  /**
+   *
+   * @return
+   *  - @c returnvalue::OK  State machine OK for this execution cycle
+   *  - @c CALL_FSM_AGAIN   State machine should be called again.
+   */
+  ReturnValue_t performStateMachine();
+
+  ReturnValue_t passPacket(PacketInfo packet);
+
+  ReturnValue_t initialize();
+
+  [[nodiscard]] CfdpStates getCfdpState() const;
+
+ private:
+  enum class TransactionStep {
+    IDLE = 0,
+    TRANSACTION_START = 1,
+    RECEIVING_FILE_DATA_PDUS = 2,
+    SENDING_ACK_PDU = 3,
+    TRANSFER_COMPLETION = 4,
+    SENDING_FINISHED_PDU = 5
+  };
+  struct TransactionParams {
+    explicit TransactionParams(size_t maxFileNameLen)
+        : sourceName(maxFileNameLen), destName(maxFileNameLen) {}
+
+    ChecksumType checksumType = ChecksumType::NULL_CHECKSUM;
+    bool closureRequested = false;
+    std::vector<char> sourceName;
+    std::vector<char> destName;
+    cfdp::FileSize fileSize;
+    TransactionId transactionId;
+    PduConfig pduConf;
+    uint32_t crc = 0;
+    uint64_t progress = 0;
+    RemoteEntityCfg* remoteCfg = nullptr;
+  };
+
+  TransactionStep step = TransactionStep::IDLE;
+  CfdpStates cfdpState = CfdpStates::IDLE;
+  std::vector<cfdp::Tlv> tlvVec;
+  std::vector<cfdp::Tlv> userTlvVec;
+  DestHandlerParams dp;
+  FsfwParams fp;
+  TransactionParams tp;
+
+  ReturnValue_t startTransaction(MetadataPduReader& reader, MetadataInfo& info);
+  ReturnValue_t handleMetadataPdu(const PacketInfo& info);
+  ReturnValue_t handleFileDataPdu(const PacketInfo& info);
+  ReturnValue_t handleEofPdu(const PacketInfo& info);
+  ReturnValue_t handleMetadataParseError(const uint8_t* rawData, size_t maxSize);
+};
+
+}  // namespace cfdp
+
+#endif  // FSFW_CFDP_CFDPDESTHANDLER_H

src/fsfw/cfdp/handler/FaultHandlerBase.cpp

@@ -0,0 +1,51 @@
+#include "FaultHandlerBase.h"
+
+namespace cfdp {
+
+FaultHandlerBase::FaultHandlerBase() = default;
+FaultHandlerBase::~FaultHandlerBase() = default;
+
+bool FaultHandlerBase::getFaultHandler(cfdp::ConditionCode code,
+                                       cfdp::FaultHandlerCodes& handler) const {
+  auto iter = faultHandlerMap.find(code);
+  if (iter == faultHandlerMap.end()) {
+    return false;
+  }
+  handler = iter->second;
+  return true;
+}
+
+bool FaultHandlerBase::setFaultHandler(cfdp::ConditionCode code, cfdp::FaultHandlerCodes handler) {
+  if (not faultHandlerMap.contains(code)) {
+    return false;
+  }
+  if (handler != FaultHandlerCodes::NOTICE_OF_SUSPENSION and
+      handler != FaultHandlerCodes::ABANDON_TRANSACTION and
+      handler != FaultHandlerCodes::NOTICE_OF_CANCELLATION and
+      handler != FaultHandlerCodes::IGNORE_ERROR) {
+    return false;
+  }
+  faultHandlerMap[code] = handler;
+  return true;
+}
+
+bool FaultHandlerBase::reportFault(cfdp::ConditionCode code) {
+  if (not faultHandlerMap.contains(code)) {
+    return false;
+  }
+  cfdp::FaultHandlerCodes fh = faultHandlerMap[code];
+  if (fh == cfdp::FaultHandlerCodes::IGNORE_ERROR) {
+    ignoreCb(code);
+  } else if (fh == cfdp::FaultHandlerCodes::ABANDON_TRANSACTION) {
+    abandonCb(code);
+  } else if (fh == cfdp::FaultHandlerCodes::NOTICE_OF_CANCELLATION) {
+    noticeOfCancellationCb(code);
+  } else if (fh == cfdp::FaultHandlerCodes::NOTICE_OF_SUSPENSION) {
+    noticeOfSuspensionCb(code);
+  } else {
+    // Should never happen, but use defensive programming
+    return false;
+  }
+  return true;
+}
+}  // namespace cfdp

src/fsfw/cfdp/handler/FaultHandlerBase.h

@@ -0,0 +1,76 @@
+#ifndef FSFW_CFDP_FAULTHANDLERBASE_H
+#define FSFW_CFDP_FAULTHANDLERBASE_H
+
+#include <etl/flat_map.h>
+
+#include "fsfw/cfdp/definitions.h"
+
+namespace cfdp {
+
+/**
+ * @brief Provides a way to implement the fault handling procedures as specified
+ * in chapter 4.8 of the CFDP standard.
+ *
+ * @details
+ * It is passed into the CFDP handlers as part of the local entity configuration and provides
+ * a way to specify custom user error handlers.
+ *
+ * It does so by mapping each applicable CFDP condition code to a fault handler which
+ * is denoted by the four @cfdp::FaultHandlerCodes. This code is used to dispatch
+ * to a user-provided callback function:
+ *
+ * 1. @FaultHandlerCodes::IGNORE_ERROR -> @ignore_cb
+ * 2. @FaultHandlerCodes::NOTICE_OF_CANCELLATION` -> @notice_of_cancellation_cb
+ * 3. @FaultHandlerCodes::NOTICE_OF_SUSPENSION` -> @notice_of_suspension_cb
+ * 4. @FaultHandlerCodes::ABANDON_TRANSACTION` -> @abandon_transaction_cb
+ *
+ * For each error reported by @reportError, the appropriate fault handler callback
+ * will be called. The user provides the callbacks by providing a custom class which implements
+ * these base class and all abstract fault handler callbacks.
+ */
+class FaultHandlerBase {
+ public:
+  virtual ~FaultHandlerBase();
+  FaultHandlerBase();
+
+  /**
+   * Get the fault handler code for the given condition code
+   * @param code
+   * @param handler [out] Will be set to the approrpiate handler for the condition code if
+   *    it is valid
+   * @return
+   *  - true if the condition code is valid
+   *  - false otherwise
+   */
+  bool getFaultHandler(cfdp::ConditionCode code, cfdp::FaultHandlerCodes& handler) const;
+
+  bool setFaultHandler(cfdp::ConditionCode code, cfdp::FaultHandlerCodes handler);
+
+  bool reportFault(cfdp::ConditionCode code);
+
+  virtual void noticeOfSuspensionCb(cfdp::ConditionCode code) = 0;
+  virtual void noticeOfCancellationCb(cfdp::ConditionCode code) = 0;
+  virtual void abandonCb(cfdp::ConditionCode code) = 0;
+  virtual void ignoreCb(cfdp::ConditionCode code) = 0;
+
+ private:
+  etl::flat_map<cfdp::ConditionCode, cfdp::FaultHandlerCodes, 10> faultHandlerMap = {
+      etl::pair{cfdp::ConditionCode::POSITIVE_ACK_LIMIT_REACHED,
+                cfdp::FaultHandlerCodes::IGNORE_ERROR},
+      etl::pair{cfdp::ConditionCode::KEEP_ALIVE_LIMIT_REACHED,
+                cfdp::FaultHandlerCodes::IGNORE_ERROR},
+      etl::pair{cfdp::ConditionCode::INVALID_TRANSMISSION_MODE,
+                cfdp::FaultHandlerCodes::IGNORE_ERROR},
+      etl::pair{cfdp::ConditionCode::FILE_CHECKSUM_FAILURE, cfdp::FaultHandlerCodes::IGNORE_ERROR},
+      etl::pair{cfdp::ConditionCode::FILE_SIZE_ERROR, cfdp::FaultHandlerCodes::IGNORE_ERROR},
+      etl::pair{cfdp::ConditionCode::NAK_LIMIT_REACHED, cfdp::FaultHandlerCodes::IGNORE_ERROR},
+      etl::pair{cfdp::ConditionCode::INACTIVITY_DETECTED, cfdp::FaultHandlerCodes::IGNORE_ERROR},
+      etl::pair{cfdp::ConditionCode::UNSUPPORTED_CHECKSUM_TYPE,
+                cfdp::FaultHandlerCodes::IGNORE_ERROR},
+      etl::pair{cfdp::ConditionCode::FILESTORE_REJECTION, cfdp::FaultHandlerCodes::IGNORE_ERROR},
+      etl::pair{cfdp::ConditionCode::CHECK_LIMIT_REACHED, cfdp::FaultHandlerCodes::IGNORE_ERROR}};
+};
+
+}  // namespace cfdp
+
+#endif  // FSFW_CFDP_FAULTHANDLERBASE_H

src/fsfw/cfdp/handler/RemoteConfigTableIF.h

@@ -0,0 +1,16 @@
+#ifndef FSFW_CFDP_HANDLER_REMOTECONFIGTABLEIF_H
+#define FSFW_CFDP_HANDLER_REMOTECONFIGTABLEIF_H
+
+#include "fsfw/cfdp/handler/mib.h"
+
+namespace cfdp {
+
+class RemoteConfigTableIF {
+ public:
+  virtual ~RemoteConfigTableIF() = default;
+  virtual bool getRemoteCfg(const cfdp::EntityId& remoteId, cfdp::RemoteEntityCfg** cfg) = 0;
+};
+
+}  // namespace cfdp
+
+#endif  // FSFW_CFDP_HANDLER_REMOTECONFIGTABLEIF_H

src/fsfw/cfdp/handler/SourceHandler.cpp

@@ -0,0 +1 @@
+#include "SourceHandler.h"

src/fsfw/cfdp/handler/SourceHandler.h

@@ -0,0 +1,6 @@
+#ifndef FSFW_CFDP_CFDPSOURCEHANDLER_H
+#define FSFW_CFDP_CFDPSOURCEHANDLER_H
+
+class SourceHandler {};
+
+#endif  // FSFW_CFDP_CFDPSOURCEHANDLER_H

src/fsfw/cfdp/handler/StatusReportIF.h

@@ -0,0 +1,12 @@
+#ifndef FSFW_CFDP_HANDLER_STATUSREPORTIF_H
+#define FSFW_CFDP_HANDLER_STATUSREPORTIF_H
+
+namespace cfdp {
+
+class StatusReportIF {
+  virtual ~StatusReportIF() = default;
+};
+
+}  // namespace cfdp
+
+#endif  // FSFW_CFDP_HANDLER_STATUSREPORTIF_H

src/fsfw/cfdp/handler/UserBase.cpp

@@ -0,0 +1,3 @@
+#include "UserBase.h"
+
+cfdp::UserBase::UserBase(HasFileSystemIF& vfs) : vfs(vfs) {}

src/fsfw/cfdp/handler/UserBase.h

@@ -0,0 +1,101 @@
+#ifndef FSFW_CFDP_USERBASE_H
+#define FSFW_CFDP_USERBASE_H
+
+#include <optional>
+#include <utility>
+#include <vector>
+
+#include "StatusReportIF.h"
+#include "fsfw/cfdp/VarLenFields.h"
+#include "fsfw/cfdp/tlv/FilestoreResponseTlv.h"
+#include "fsfw/cfdp/tlv/MessageToUserTlv.h"
+#include "fsfw/filesystem/HasFileSystemIF.h"
+
+namespace cfdp {
+
+struct TransactionFinishedParams {
+  TransactionFinishedParams(TransactionId id, ConditionCode code, FileDeliveryStatus status,
+                            FileDeliveryCode delivCode)
+      : id(std::move(id)), condCode(code), status(status), deliveryCode(delivCode) {}
+
+  TransactionId id;
+  ConditionCode condCode;
+  FileDeliveryStatus status;
+  FileDeliveryCode deliveryCode;
+  std::vector<FilestoreResponseTlv*> fsResponses;
+  StatusReportIF* statusReport = nullptr;
+};
+
+struct MetadataRecvdParams {
+  MetadataRecvdParams(const TransactionId& id, const EntityId& sourceId)
+      : id(id), sourceId(sourceId) {}
+  const TransactionId& id;
+  const EntityId& sourceId;
+  uint64_t fileSize = 0;
+  const char* sourceFileName = "";
+  const char* destFileName = "";
+  size_t msgsToUserLen = 0;
+  const MessageToUserTlv* msgsToUserArray = nullptr;
+};
+
+struct FileSegmentRecvdParams {
+  TransactionId id;
+  size_t offset;
+  size_t length;
+  std::optional<RecordContinuationState> recContState = std::nullopt;
+  std::pair<const uint8_t*, size_t> segmentMetadata;
+};
+
+/**
+ * @brief Base class which provides a user interface to interact with CFDP handlers.
+ *
+ * @details
+ * This class is also used to pass the Virtual Filestore (VFS) Implementation to the CFDP
+ * handlers so the filestore operations can be mapped to the underlying filestore.
+ *
+ * It is used by implementing it in a child class and then passing it to the CFDP
+ * handler objects. The base class provides default implementation for the user indication
+ * primitives specified in the CFDP standard. The user can override these implementations
+ * to provide custom indication handlers.
+ *
+ * Please note that for all indication callbacks, the passed transaction ID reference will
+ * become invalid shortly after the function has been executed. If the transaction ID is to be
+ * cached or used, create an own copy of it.
+ * @param vfs Virtual Filestore Object. Will be used for all file operations
+ */
+class UserBase {
+  friend class DestHandler;
+
+ public:
+  explicit UserBase(HasFileSystemIF& vfs);
+
+  virtual void transactionIndication(const TransactionId& id) = 0;
+  virtual void eofSentIndication(const TransactionId& id) = 0;
+  virtual void transactionFinishedIndication(const TransactionFinishedParams& params) = 0;
+  /**
+   * Will be called if metadata was received.
+   *
+   * IMPORTANT: The passed struct contains the messages to the user in form of a raw C array.
+   * The TLVs in these arrays are zero-copy types, which means that they point to the raw data
+   * inside the metadata packet directly. The metadata packet will be deleted from the TC store
+   * shortly after it was processed. If some of the data is to be cached and/or used after the
+   * function call, it needs to be copied into another user-provided buffer.
+   * @param params
+   */
+  virtual void metadataRecvdIndication(const MetadataRecvdParams& params) = 0;
+  virtual void fileSegmentRecvdIndication(const FileSegmentRecvdParams& params) = 0;
+  virtual void reportIndication(const TransactionId& id, StatusReportIF& report) = 0;
+  virtual void suspendedIndication(const TransactionId& id, ConditionCode code) = 0;
+  virtual void resumedIndication(const TransactionId& id, size_t progress) = 0;
+  virtual void faultIndication(const TransactionId& id, ConditionCode code, size_t progress) = 0;
+  virtual void abandonedIndication(const TransactionId& id, ConditionCode code,
+                                   size_t progress) = 0;
+  virtual void eofRecvIndication(const TransactionId& id) = 0;
+
+ private:
+  HasFileSystemIF& vfs;
+};
+
+}  // namespace cfdp
+
+#endif  // FSFW_CFDP_USERBASE_H

src/fsfw/cfdp/handler/defs.h

@@ -0,0 +1,9 @@
+#ifndef FSFW_CFDP_HANDLER_DEFS_H
+#define FSFW_CFDP_HANDLER_DEFS_H
+
+namespace cfdp {
+
+enum class CfdpStates { IDLE, BUSY_CLASS_1_NACKED, BUSY_CLASS_2_ACKED, SUSPENDED };
+
+}
+#endif  // FSFW_CFDP_HANDLER_DEFS_H

src/fsfw/cfdp/handler/mib.h

@@ -0,0 +1,41 @@
+#ifndef FSFW_CFDP_MIB_H
+#define FSFW_CFDP_MIB_H
+
+#include <utility>
+
+#include "FaultHandlerBase.h"
+#include "fsfw/cfdp/pdu/PduConfig.h"
+
+namespace cfdp {
+
+struct IndicationCfg {
+  bool eofSentIndicRequired = true;
+  bool eofRecvIndicRequired = true;
+  bool fileSegmentRecvIndicRequired = true;
+  bool transactionFinishedIndicRequired = true;
+  bool suspendedIndicRequired = true;
+  bool resumedIndicRequired = true;
+};
+
+struct LocalEntityCfg {
+  LocalEntityCfg(EntityId localId, IndicationCfg indicationCfg, FaultHandlerBase& fhBase)
+      : localId(std::move(localId)), indicCfg(indicationCfg), fhBase(fhBase) {}
+
+  EntityId localId;
+  IndicationCfg indicCfg;
+  FaultHandlerBase& fhBase;
+};
+
+struct RemoteEntityCfg {
+  EntityId remoteId;
+  size_t maxFileSegmentLen = 2048;
+  bool closureRequested = false;
+  bool crcOnTransmission = false;
+  TransmissionModes defaultTransmissionMode = TransmissionModes::UNACKNOWLEDGED;
+  ChecksumType defaultChecksum = ChecksumType::NULL_CHECKSUM;
+  const uint8_t version = CFDP_VERSION_2;
+};
+
+}  // namespace cfdp
+
+#endif  // FSFW_CFDP_MIB_H

src/fsfw/cfdp/pdu/AckPduDeserializer.cpp

@@ -1,21 +1,21 @@
 #include "AckPduDeserializer.h"
 
 AckPduDeserializer::AckPduDeserializer(const uint8_t* pduBuf, size_t maxSize, AckInfo& info)
-    : FileDirectiveDeserializer(pduBuf, maxSize), info(info) {}
+    : FileDirectiveReader(pduBuf, maxSize), info(info) {}
 
 ReturnValue_t AckPduDeserializer::parseData() {
-  ReturnValue_t result = FileDirectiveDeserializer::parseData();
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  ReturnValue_t result = FileDirectiveReader::parseData();
+  if (result != returnvalue::OK) {
     return result;
   }
-  size_t currentIdx = FileDirectiveDeserializer::getHeaderSize();
+  size_t currentIdx = FileDirectiveReader::getHeaderSize();
   if (currentIdx + 2 > this->maxSize) {
     return SerializeIF::BUFFER_TOO_SHORT;
   }
-  if (not checkAndSetCodes(rawPtr[currentIdx], rawPtr[currentIdx + 1])) {
+  if (not checkAndSetCodes(pointers.rawPtr[currentIdx], pointers.rawPtr[currentIdx + 1])) {
     return cfdp::INVALID_ACK_DIRECTIVE_FIELDS;
   }
-  return HasReturnvaluesIF::RETURN_OK;
+  return returnvalue::OK;
 }
 
 bool AckPduDeserializer::checkAndSetCodes(uint8_t firstByte, uint8_t secondByte) {

src/fsfw/cfdp/pdu/AckPduDeserializer.h

@@ -2,9 +2,9 @@
 #define FSFW_SRC_FSFW_CFDP_PDU_ACKPDUDESERIALIZER_H_
 
 #include "AckInfo.h"
-#include "fsfw/cfdp/pdu/FileDirectiveDeserializer.h"
+#include "fsfw/cfdp/pdu/FileDirectiveReader.h"
 
-class AckPduDeserializer : public FileDirectiveDeserializer {
+class AckPduDeserializer : public FileDirectiveReader {
  public:
   AckPduDeserializer(const uint8_t* pduBuf, size_t maxSize, AckInfo& info);
 

src/fsfw/cfdp/pdu/AckPduSerializer.cpp

@@ -1,17 +1,16 @@
 #include "AckPduSerializer.h"
 
 AckPduSerializer::AckPduSerializer(AckInfo &ackInfo, PduConfig &pduConf)
-    : FileDirectiveSerializer(pduConf, cfdp::FileDirectives::ACK, 2), ackInfo(ackInfo) {}
+    : FileDirectiveCreator(pduConf, cfdp::FileDirectives::ACK, 2), ackInfo(ackInfo) {}
 
 size_t AckPduSerializer::getSerializedSize() const {
-  return FileDirectiveSerializer::getWholePduSize();
+  return FileDirectiveCreator::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) {
+  ReturnValue_t result = FileDirectiveCreator::serialize(buffer, size, maxSize, streamEndianness);
+  if (result != returnvalue::OK) {
     return result;
   }
   cfdp::FileDirectives ackedDirective = ackInfo.getAckedDirective();
@@ -21,7 +20,7 @@ ReturnValue_t AckPduSerializer::serialize(uint8_t **buffer, size_t *size, size_t
   if (ackedDirective != cfdp::FileDirectives::FINISH and
       ackedDirective != cfdp::FileDirectives::EOF_DIRECTIVE) {
     // TODO: better returncode
-    return HasReturnvaluesIF::RETURN_FAILED;
+    return returnvalue::FAILED;
   }
   if (*size + 2 > maxSize) {
     return SerializeIF::BUFFER_TOO_SHORT;
@@ -32,5 +31,5 @@ ReturnValue_t AckPduSerializer::serialize(uint8_t **buffer, size_t *size, size_t
   **buffer = ackedConditionCode << 4 | transactionStatus;
   *buffer += 1;
   *size += 1;
-  return HasReturnvaluesIF::RETURN_OK;
+  return returnvalue::OK;
 }

src/fsfw/cfdp/pdu/AckPduSerializer.h

@@ -2,10 +2,10 @@
 #define FSFW_SRC_FSFW_CFDP_PDU_ACKPDUSERIALIZER_H_
 
 #include "AckInfo.h"
-#include "FileDirectiveDeserializer.h"
-#include "FileDirectiveSerializer.h"
+#include "FileDirectiveCreator.h"
+#include "FileDirectiveReader.h"
 
-class AckPduSerializer : public FileDirectiveSerializer {
+class AckPduSerializer : public FileDirectiveCreator {
  public:
   /**
    * @brief   Serializer to pack ACK PDUs

src/fsfw/cfdp/pdu/CMakeLists.txt

@@ -1,17 +1,16 @@
 target_sources(
   ${LIB_FSFW_NAME}
   PRIVATE PduConfig.cpp
-          VarLenField.cpp
-          HeaderSerializer.cpp
-          HeaderDeserializer.cpp
-          FileDirectiveDeserializer.cpp
-          FileDirectiveSerializer.cpp
+          HeaderCreator.cpp
+          HeaderReader.cpp
+          FileDirectiveReader.cpp
+          FileDirectiveCreator.cpp
           AckInfo.cpp
           AckPduSerializer.cpp
           AckPduDeserializer.cpp
           EofInfo.cpp
-          EofPduSerializer.cpp
-          EofPduDeserializer.cpp
+          EofPduCreator.cpp
+          EofPduReader.cpp
           NakInfo.cpp
           NakPduSerializer.cpp
           NakPduDeserializer.cpp
@@ -19,12 +18,12 @@ target_sources(
           FinishedPduSerializer.cpp
           FinishedPduDeserializer.cpp
           MetadataInfo.cpp
-          MetadataPduSerializer.cpp
-          MetadataPduDeserializer.cpp
+          MetadataPduCreator.cpp
+          MetadataPduReader.cpp
           KeepAlivePduSerializer.cpp
           KeepAlivePduDeserializer.cpp
           PromptPduSerializer.cpp
           PromptPduDeserializer.cpp
-          FileDataSerializer.cpp
-          FileDataDeserializer.cpp
+          FileDataCreator.cpp
+          FileDataReader.cpp
           FileDataInfo.cpp)

src/fsfw/cfdp/pdu/EofInfo.h

@@ -7,16 +7,16 @@
 
 struct EofInfo {
  public:
-  EofInfo(EntityIdTlv* faultLoc = nullptr);
+  explicit 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;
+  [[nodiscard]] uint32_t getChecksum() const;
+  [[nodiscard]] cfdp::ConditionCode getConditionCode() const;
 
-  EntityIdTlv* getFaultLoc() const;
+  [[nodiscard]] EntityIdTlv* getFaultLoc() const;
   cfdp::FileSize& getFileSize();
   void setChecksum(uint32_t checksum);
   void setConditionCode(cfdp::ConditionCode conditionCode);

src/fsfw/cfdp/pdu/EofPduCreator.cpp

@@ -1,22 +1,18 @@
-#include "EofPduSerializer.h"
+#include "EofPduCreator.h"
 
 #include "fsfw/FSFW.h"
-#include "fsfw/serviceinterface.h"
 
-EofPduSerializer::EofPduSerializer(PduConfig &conf, EofInfo &info)
-    : FileDirectiveSerializer(conf, cfdp::FileDirectives::EOF_DIRECTIVE, 9), info(info) {
-  setDirectiveDataFieldLen(info.getSerializedSize(getLargeFileFlag()));
+EofPduCreator::EofPduCreator(PduConfig &conf, EofInfo &info)
+    : FileDirectiveCreator(conf, cfdp::FileDirectives::EOF_DIRECTIVE, 9), info(info) {
+  setDirectiveDataFieldLen(info.getSerializedSize(HeaderCreator::getLargeFileFlag()));
 }
 
-size_t EofPduSerializer::getSerializedSize() const {
-  return FileDirectiveSerializer::getWholePduSize();
-}
+size_t EofPduCreator::getSerializedSize() const { return FileDirectiveCreator::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) {
+ReturnValue_t EofPduCreator::serialize(uint8_t **buffer, size_t *size, size_t maxSize,
+                                       Endianness streamEndianness) const {
+  ReturnValue_t result = FileDirectiveCreator::serialize(buffer, size, maxSize, streamEndianness);
+  if (result != returnvalue::OK) {
     return result;
   }
   if (*size + 1 > maxSize) {
@@ -27,7 +23,7 @@ ReturnValue_t EofPduSerializer::serialize(uint8_t **buffer, size_t *size, size_t
   *size += 1;
   uint32_t checksum = info.getChecksum();
   result = SerializeAdapter::serialize(&checksum, buffer, size, maxSize, streamEndianness);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     return result;
   }
   if (info.getFileSize().isLargeFile()) {

src/fsfw/cfdp/pdu/EofPduCreator.h

@@ -2,14 +2,14 @@
 #define FSFW_SRC_FSFW_CFDP_PDU_EOFPDUSERIALIZER_H_
 
 #include "EofInfo.h"
-#include "fsfw/cfdp/pdu/FileDirectiveSerializer.h"
+#include "fsfw/cfdp/pdu/FileDirectiveCreator.h"
 #include "fsfw/cfdp/tlv/EntityIdTlv.h"
 
-class EofPduSerializer : public FileDirectiveSerializer {
+class EofPduCreator : public FileDirectiveCreator {
  public:
-  EofPduSerializer(PduConfig& conf, EofInfo& info);
+  EofPduCreator(PduConfig& conf, EofInfo& info);
 
-  size_t getSerializedSize() const override;
+  [[nodiscard]] size_t getSerializedSize() const override;
 
   ReturnValue_t serialize(uint8_t** buffer, size_t* size, size_t maxSize,
                           Endianness streamEndianness) const override;

src/fsfw/cfdp/pdu/EofPduDeserializer.h

@@ -1,17 +0,0 @@
-#ifndef FSFW_SRC_FSFW_CFDP_PDU_EOFPDUDESERIALIZER_H_
-#define FSFW_SRC_FSFW_CFDP_PDU_EOFPDUDESERIALIZER_H_
-
-#include "EofInfo.h"
-#include "fsfw/cfdp/pdu/FileDirectiveDeserializer.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/EofPduReader.cpp

@@ -1,23 +1,23 @@
-#include "EofPduDeserializer.h"
+#include "EofPduReader.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) {}
+EofPduReader::EofPduReader(const uint8_t* pduBuf, size_t maxSize, EofInfo& eofInfo)
+    : FileDirectiveReader(pduBuf, maxSize), info(eofInfo) {}
 
-ReturnValue_t EofPduDeserializer::parseData() {
-  ReturnValue_t result = FileDirectiveDeserializer::parseData();
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+ReturnValue_t EofPduReader::parseData() {
+  ReturnValue_t result = FileDirectiveReader::parseData();
+  if (result != returnvalue::OK) {
     return result;
   }
 
-  const uint8_t* bufPtr = rawPtr;
+  const uint8_t* bufPtr = pointers.rawPtr;
   size_t expectedFileFieldLen = 4;
   if (this->getLargeFileFlag()) {
     expectedFileFieldLen = 8;
   }
-  size_t currentIdx = FileDirectiveDeserializer::getHeaderSize();
+  size_t currentIdx = FileDirectiveReader::getHeaderSize();
   size_t deserLen = maxSize;
   if (maxSize < currentIdx + 5 + expectedFileFieldLen) {
     return SerializeIF::STREAM_TOO_SHORT;
@@ -31,7 +31,7 @@ ReturnValue_t EofPduDeserializer::parseData() {
   uint32_t checksum = 0;
   auto endianness = getEndianness();
   result = SerializeAdapter::deSerialize(&checksum, &bufPtr, &deserLen, endianness);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     return result;
   }
   info.setChecksum(checksum);
@@ -44,7 +44,7 @@ ReturnValue_t EofPduDeserializer::parseData() {
     result = SerializeAdapter::deSerialize(&fileSizeValue, &bufPtr, &deserLen, endianness);
     info.setFileSize(fileSizeValue, false);
   }
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     return result;
   }
   if (info.getConditionCode() != cfdp::ConditionCode::NO_ERROR) {
@@ -61,7 +61,7 @@ ReturnValue_t EofPduDeserializer::parseData() {
           " given TLV pointer invalid");
 #endif
 #endif /* FSFW_VERBOSE_LEVEL >= 1 */
-      return HasReturnvaluesIF::RETURN_FAILED;
+      return returnvalue::FAILED;
     }
     result = tlvPtr->deSerialize(&bufPtr, &deserLen, endianness);
   }

src/fsfw/cfdp/pdu/EofPduReader.h

@@ -0,0 +1,17 @@
+#ifndef FSFW_SRC_FSFW_CFDP_PDU_EOFPDUDESERIALIZER_H_
+#define FSFW_SRC_FSFW_CFDP_PDU_EOFPDUDESERIALIZER_H_
+
+#include "EofInfo.h"
+#include "fsfw/cfdp/pdu/FileDirectiveReader.h"
+
+class EofPduReader : public FileDirectiveReader {
+ public:
+  EofPduReader(const uint8_t* pduBuf, size_t maxSize, EofInfo& eofInfo);
+
+  ReturnValue_t parseData() override;
+
+ private:
+  EofInfo& info;
+};
+
+#endif /* FSFW_SRC_FSFW_CFDP_PDU_EOFPDUDESERIALIZER_H_ */

src/fsfw/cfdp/pdu/FileDataCreator.cpp

@@ -1,23 +1,22 @@
-#include "FileDataSerializer.h"
+#include "FileDataCreator.h"
 
 #include <cstring>
 
-FileDataSerializer::FileDataSerializer(PduConfig& conf, FileDataInfo& info)
-    : HeaderSerializer(conf, cfdp::PduType::FILE_DATA, 0, info.getSegmentMetadataFlag()),
-      info(info) {
+FileDataCreator::FileDataCreator(PduConfig& conf, FileDataInfo& info)
+    : HeaderCreator(conf, cfdp::PduType::FILE_DATA, 0, info.getSegmentMetadataFlag()), info(info) {
   update();
 }
 
-void FileDataSerializer::update() {
+void FileDataCreator::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) {
+ReturnValue_t FileDataCreator::serialize(uint8_t** buffer, size_t* size, size_t maxSize,
+                                         Endianness streamEndianness) const {
+  ReturnValue_t result = HeaderCreator::serialize(buffer, size, maxSize, streamEndianness);
+  if (result != returnvalue::OK) {
     return result;
   }
   if (*size + this->getSerializedSize() > maxSize) {
@@ -36,7 +35,7 @@ ReturnValue_t FileDataSerializer::serialize(uint8_t** buffer, size_t* size, size
   }
   cfdp::FileSize& offset = info.getOffset();
   result = offset.serialize(this->getLargeFileFlag(), buffer, size, maxSize, streamEndianness);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  if (result != returnvalue::OK) {
     return result;
   }
   size_t fileSize = 0;
@@ -47,9 +46,9 @@ ReturnValue_t FileDataSerializer::serialize(uint8_t** buffer, size_t* size, size
   std::memcpy(*buffer, readOnlyPtr, fileSize);
   *buffer += fileSize;
   *size += fileSize;
-  return HasReturnvaluesIF::RETURN_OK;
+  return returnvalue::OK;
 }
 
-size_t FileDataSerializer::getSerializedSize() const {
-  return HeaderSerializer::getSerializedSize() + info.getSerializedSize(this->getLargeFileFlag());
+size_t FileDataCreator::getSerializedSize() const {
+  return HeaderCreator::getSerializedSize() + info.getSerializedSize(this->getLargeFileFlag());
 }

src/fsfw/cfdp/pdu/FileDataCreator.h

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

src/fsfw/cfdp/pdu/FileDataDeserializer.cpp

@@ -1,48 +0,0 @@
-#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/FileDataInfo.cpp

@@ -50,23 +50,23 @@ ReturnValue_t FileDataInfo::addSegmentMetadataInfo(cfdp::RecordContinuationState
   this->segmentMetadataFlag = cfdp::SegmentMetadataFlag::PRESENT;
   this->recContState = recContState;
   if (segmentMetadataLen > 63) {
-    return HasReturnvaluesIF::RETURN_FAILED;
+    return returnvalue::FAILED;
   }
   this->segmentMetadata = segmentMetadata;
   this->segmentMetadataLen = segmentMetadataLen;
-  return HasReturnvaluesIF::RETURN_OK;
+  return returnvalue::OK;
 }
 
-const uint8_t *FileDataInfo::getFileData(size_t *fileSize) const {
-  if (fileSize != nullptr) {
-    *fileSize = this->fileSize;
+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;
+const uint8_t *FileDataInfo::getSegmentMetadata(size_t *segmentMetadataLen_) {
+  if (segmentMetadataLen_ != nullptr) {
+    *segmentMetadataLen_ = this->segmentMetadataLen;
   }
   return segmentMetadata;
 }

src/fsfw/cfdp/pdu/FileDataInfo.h

@@ -6,25 +6,25 @@
 
 class FileDataInfo {
  public:
-  FileDataInfo(cfdp::FileSize& offset);
+  explicit FileDataInfo(cfdp::FileSize& offset);
   FileDataInfo(cfdp::FileSize& offset, const uint8_t* fileData, size_t fileSize);
 
-  size_t getSerializedSize(bool largeFile = false) const;
+  [[nodiscard]] 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;
+  [[nodiscard]] cfdp::SegmentMetadataFlag getSegmentMetadataFlag() const;
+  [[nodiscard]] cfdp::SegmentationControl getSegmentationControl() const;
+  [[nodiscard]] cfdp::RecordContinuationState getRecordContinuationState() const;
   void setRecordContinuationState(cfdp::RecordContinuationState recContState);
   void setSegmentationControl(cfdp::SegmentationControl segCtrl);
 
-  size_t getSegmentMetadataLen() const;
+  [[nodiscard]] size_t getSegmentMetadataLen() const;
   void setSegmentMetadataLen(size_t len);
   void setSegmentMetadata(const uint8_t* ptr);
-  bool hasSegmentMetadata() const;
+  [[nodiscard]] bool hasSegmentMetadata() const;
   void setSegmentMetadataFlag(bool enable);
   ReturnValue_t addSegmentMetadataInfo(cfdp::RecordContinuationState recContState,
                                        const uint8_t* segmentMetadata, size_t segmentMetadataLen);

src/fsfw/cfdp/pdu/FileDataReader.cpp

@@ -0,0 +1,47 @@
+#include "FileDataReader.h"
+
+FileDataReader::FileDataReader(const uint8_t* pduBuf, size_t maxSize, FileDataInfo& info)
+    : HeaderReader(pduBuf, maxSize), info(info) {}
+
+ReturnValue_t FileDataReader::parseData() {
+  ReturnValue_t result = HeaderReader::parseData();
+  if (result != returnvalue::OK) {
+    return result;
+  }
+  size_t currentIdx = HeaderReader::getHeaderSize();
+  const uint8_t* buf = pointers.rawPtr + currentIdx;
+  size_t remSize = HeaderReader::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 != returnvalue::OK) {
+    return result;
+  }
+  if (remSize > 0) {
+    info.setFileData(buf, remSize);
+  }
+  return returnvalue::OK;
+}
+
+SerializeIF::Endianness FileDataReader::getEndianness() const { return endianness; }
+
+void FileDataReader::setEndianness(SerializeIF::Endianness endianness_) {
+  endianness = endianness_;
+}

src/fsfw/cfdp/pdu/FileDataReader.h

@@ -3,14 +3,14 @@
 
 #include "../definitions.h"
 #include "FileDataInfo.h"
-#include "HeaderDeserializer.h"
+#include "HeaderReader.h"
 
-class FileDataDeserializer : public HeaderDeserializer {
+class FileDataReader : public HeaderReader {
  public:
-  FileDataDeserializer(const uint8_t* pduBuf, size_t maxSize, FileDataInfo& info);
+  FileDataReader(const uint8_t* pduBuf, size_t maxSize, FileDataInfo& info);
 
-  ReturnValue_t parseData();
-  SerializeIF::Endianness getEndianness() const;
+  ReturnValue_t parseData() override;
+  [[nodiscard]] SerializeIF::Endianness getEndianness() const;
   void setEndianness(SerializeIF::Endianness endianness = SerializeIF::Endianness::NETWORK);
 
  private:

src/fsfw/cfdp/pdu/FileDataSerializer.h

@@ -1,23 +0,0 @@
-#ifndef FSFW_SRC_FSFW_CFDP_PDU_FILEDATASERIALIZER_H_
-#define FSFW_SRC_FSFW_CFDP_PDU_FILEDATASERIALIZER_H_
-
-#include "../definitions.h"
-#include "FileDataInfo.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/FileDirectiveCreator.cpp

@@ -0,0 +1,37 @@
+#include "FileDirectiveCreator.h"
+
+FileDirectiveCreator::FileDirectiveCreator(PduConfig &pduConf, cfdp::FileDirectives directiveCode,
+                                           size_t directiveParamFieldLen)
+    : HeaderCreator(pduConf, cfdp::PduType::FILE_DIRECTIVE, directiveParamFieldLen + 1),
+      directiveCode(directiveCode) {}
+
+size_t FileDirectiveCreator::getSerializedSize() const {
+  return HeaderCreator::getSerializedSize() + 1;
+}
+
+ReturnValue_t FileDirectiveCreator::serialize(uint8_t **buffer, size_t *size, size_t maxSize,
+                                              Endianness streamEndianness) const {
+  if (buffer == nullptr or size == nullptr) {
+    return returnvalue::FAILED;
+  }
+  if (FileDirectiveCreator::getWholePduSize() > maxSize) {
+    return BUFFER_TOO_SHORT;
+  }
+  ReturnValue_t result = HeaderCreator::serialize(buffer, size, maxSize, streamEndianness);
+  if (result != returnvalue::OK) {
+    return result;
+  }
+
+  if (*size >= maxSize) {
+    return BUFFER_TOO_SHORT;
+  }
+  **buffer = directiveCode;
+  *buffer += 1;
+  *size += 1;
+  return returnvalue::OK;
+}
+
+void FileDirectiveCreator::setDirectiveDataFieldLen(size_t len) {
+  // Set length of data field plus 1 byte for the directive octet
+  HeaderCreator::setPduDataFieldLen(len + 1);
+}

src/fsfw/cfdp/pdu/FileDirectiveCreator.h

@@ -1,20 +1,20 @@
 #ifndef FSFW_SRC_FSFW_CFDP_PDU_FILEDIRECTIVESERIALIZER_H_
 #define FSFW_SRC_FSFW_CFDP_PDU_FILEDIRECTIVESERIALIZER_H_
 
-#include "fsfw/cfdp/pdu/HeaderSerializer.h"
+#include "fsfw/cfdp/pdu/HeaderCreator.h"
 
-class FileDirectiveSerializer : public HeaderSerializer {
+class FileDirectiveCreator : public HeaderCreator {
  public:
-  FileDirectiveSerializer(PduConfig& pduConf, cfdp::FileDirectives directiveCode,
-                          size_t directiveParamFieldLen);
+  FileDirectiveCreator(PduConfig& pduConf, cfdp::FileDirectives directiveCode,
+                       size_t directiveParamFieldLen);
 
   /**
    * This only returns the size of the PDU header + 1 for the directive code octet.
-   * Use FileDirectiveSerializer::getWholePduSize to get the full packet length, assuming
+   * Use FileDirectiveCreator::getWholePduSize to get the full packet length, assuming
    * the length fields was set correctly
    * @return
    */
-  size_t getSerializedSize() const override;
+  [[nodiscard]] size_t getSerializedSize() const override;
 
   ReturnValue_t serialize(uint8_t** buffer, size_t* size, size_t maxSize,
                           Endianness streamEndianness) const override;

src/fsfw/cfdp/pdu/FileDirectiveDeserializer.cpp

@@ -1,49 +0,0 @@
-#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)) {
-    // Invalid directive field. TODO: Custom returnvalue
-    return false;
-  }
-  return true;
-}
-
-void FileDirectiveDeserializer::setFileDirective(cfdp::FileDirectives fileDirective) {
-  this->fileDirective = fileDirective;
-}
-
-void FileDirectiveDeserializer::setEndianness(SerializeIF::Endianness endianness) {
-  this->endianness = endianness;
-}
-
-SerializeIF::Endianness FileDirectiveDeserializer::getEndianness() const { return endianness; }

src/fsfw/cfdp/pdu/FileDirectiveReader.cpp

@@ -0,0 +1,49 @@
+#include "FileDirectiveReader.h"
+
+FileDirectiveReader::FileDirectiveReader(const uint8_t *pduBuf, size_t maxSize)
+    : HeaderReader(pduBuf, maxSize) {}
+
+cfdp::FileDirectives FileDirectiveReader::getFileDirective() const { return fileDirective; }
+
+ReturnValue_t FileDirectiveReader::parseData() {
+  ReturnValue_t result = HeaderReader::parseData();
+  if (result != returnvalue::OK) {
+    return result;
+  }
+  if (this->getPduDataFieldLen() < 1) {
+    return cfdp::INVALID_PDU_DATAFIELD_LEN;
+  }
+  if (FileDirectiveReader::getWholePduSize() > maxSize) {
+    return SerializeIF::STREAM_TOO_SHORT;
+  }
+  size_t currentIdx = HeaderReader::getHeaderSize();
+  if (not checkFileDirective(pointers.rawPtr[currentIdx])) {
+    return cfdp::INVALID_DIRECTIVE_FIELDS;
+  }
+  setFileDirective(static_cast<cfdp::FileDirectives>(pointers.rawPtr[currentIdx]));
+  return returnvalue::OK;
+}
+
+size_t FileDirectiveReader::getHeaderSize() const {
+  // return size of header plus the directive byte
+  return HeaderReader::getHeaderSize() + 1;
+}
+
+bool FileDirectiveReader::checkFileDirective(uint8_t rawByte) {
+  if (rawByte < cfdp::FileDirectives::EOF_DIRECTIVE or
+      (rawByte > cfdp::FileDirectives::PROMPT and rawByte != cfdp::FileDirectives::KEEP_ALIVE)) {
+    // Invalid directive field. TODO: Custom returnvalue
+    return false;
+  }
+  return true;
+}
+
+void FileDirectiveReader::setFileDirective(cfdp::FileDirectives fileDirective_) {
+  fileDirective = fileDirective_;
+}
+
+void FileDirectiveReader::setEndianness(SerializeIF::Endianness endianness_) {
+  endianness = endianness_;
+}
+
+SerializeIF::Endianness FileDirectiveReader::getEndianness() const { return endianness; }

src/fsfw/cfdp/pdu/FileDirectiveReader.h

@@ -2,7 +2,7 @@
 #define FSFW_SRC_FSFW_CFDP_PDU_FILEDIRECTIVEDESERIALIZER_H_
 
 #include "../definitions.h"
-#include "fsfw/cfdp/pdu/HeaderDeserializer.h"
+#include "fsfw/cfdp/pdu/HeaderReader.h"
 
 /**
  * @brief   This class is used to deserialize a PDU file directive header from raw memory.
@@ -11,24 +11,24 @@
  * This is a zero-copy implementation and #parseData needs to be called to ensure the data is
  * valid.
  */
-class FileDirectiveDeserializer : public HeaderDeserializer {
+class FileDirectiveReader : public HeaderReader {
  public:
-  FileDirectiveDeserializer(const uint8_t* pduBuf, size_t maxSize);
+  FileDirectiveReader(const uint8_t* pduBuf, size_t maxSize);
 
   /**
    * This needs to be called before accessing the PDU fields to avoid segmentation faults.
    * @return
    */
-  virtual ReturnValue_t parseData();
-  size_t getHeaderSize() const;
+  ReturnValue_t parseData() override;
+  [[nodiscard]] size_t getHeaderSize() const override;
 
-  cfdp::FileDirectives getFileDirective() const;
+  [[nodiscard]] cfdp::FileDirectives getFileDirective() const;
 
   void setEndianness(SerializeIF::Endianness endianness);
-  SerializeIF::Endianness getEndianness() const;
+  [[nodiscard]] SerializeIF::Endianness getEndianness() const;
 
  protected:
-  bool checkFileDirective(uint8_t rawByte);
+  static bool checkFileDirective(uint8_t rawByte);
 
  private:
   void setFileDirective(cfdp::FileDirectives fileDirective);

src/fsfw/cfdp/pdu/FileDirectiveSerializer.cpp

@@ -1,38 +0,0 @@
-#include "FileDirectiveSerializer.h"
-
-FileDirectiveSerializer::FileDirectiveSerializer(PduConfig &pduConf,
-                                                 cfdp::FileDirectives directiveCode,
-                                                 size_t directiveParamFieldLen)
-    : HeaderSerializer(pduConf, cfdp::PduType::FILE_DIRECTIVE, directiveParamFieldLen + 1),
-      directiveCode(directiveCode) {}
-
-size_t FileDirectiveSerializer::getSerializedSize() const {
-  return HeaderSerializer::getSerializedSize() + 1;
-}
-
-ReturnValue_t FileDirectiveSerializer::serialize(uint8_t **buffer, size_t *size, size_t maxSize,
-                                                 Endianness streamEndianness) const {
-  if (buffer == nullptr or size == nullptr) {
-    return HasReturnvaluesIF::RETURN_FAILED;
-  }
-  if (FileDirectiveSerializer::getWholePduSize() > maxSize) {
-    return BUFFER_TOO_SHORT;
-  }
-  ReturnValue_t result = HeaderSerializer::serialize(buffer, size, maxSize, streamEndianness);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
-    return result;
-  }
-
-  if (*size >= maxSize) {
-    return BUFFER_TOO_SHORT;
-  }
-  **buffer = directiveCode;
-  *buffer += 1;
-  *size += 1;
-  return HasReturnvaluesIF::RETURN_OK;
-}
-
-void FileDirectiveSerializer::setDirectiveDataFieldLen(size_t len) {
-  // Set length of data field plus 1 byte for the directive octet
-  HeaderSerializer::setPduDataFieldLen(len + 1);
-}

src/fsfw/cfdp/pdu/FinishedInfo.cpp

@@ -2,9 +2,8 @@
 
 FinishedInfo::FinishedInfo() {}
 
-FinishedInfo::FinishedInfo(cfdp::ConditionCode conditionCode,
-                           cfdp::FinishedDeliveryCode deliveryCode,
-                           cfdp::FinishedFileStatus fileStatus)
+FinishedInfo::FinishedInfo(cfdp::ConditionCode conditionCode, cfdp::FileDeliveryCode deliveryCode,
+                           cfdp::FileDeliveryStatus fileStatus)
     : conditionCode(conditionCode), deliveryCode(deliveryCode), fileStatus(fileStatus) {}
 
 size_t FinishedInfo::getSerializedSize() const {
@@ -46,14 +45,14 @@ ReturnValue_t FinishedInfo::setFilestoreResponsesArray(FilestoreResponseTlv** fs
   if (maxFsResponsesLen != nullptr) {
     this->fsResponsesMaxLen = *maxFsResponsesLen;
   }
-  return HasReturnvaluesIF::RETURN_OK;
+  return returnvalue::OK;
 }
 
 ReturnValue_t FinishedInfo::getFilestoreResonses(FilestoreResponseTlv*** fsResponses,
                                                  size_t* fsResponsesLen,
                                                  size_t* fsResponsesMaxLen) {
   if (fsResponses == nullptr) {
-    return HasReturnvaluesIF::RETURN_FAILED;
+    return returnvalue::FAILED;
   }
   *fsResponses = this->fsResponses;
   if (fsResponsesLen != nullptr) {
@@ -62,7 +61,7 @@ ReturnValue_t FinishedInfo::getFilestoreResonses(FilestoreResponseTlv*** fsRespo
   if (fsResponsesMaxLen != nullptr) {
     *fsResponsesMaxLen = this->fsResponsesMaxLen;
   }
-  return HasReturnvaluesIF::RETURN_OK;
+  return returnvalue::OK;
 }
 
 void FinishedInfo::setFaultLocation(EntityIdTlv* faultLocation) {
@@ -71,10 +70,10 @@ void FinishedInfo::setFaultLocation(EntityIdTlv* faultLocation) {
 
 ReturnValue_t FinishedInfo::getFaultLocation(EntityIdTlv** faultLocation) {
   if (this->faultLocation == nullptr) {
-    return HasReturnvaluesIF::RETURN_FAILED;
+    return returnvalue::FAILED;
   }
   *faultLocation = this->faultLocation;
-  return HasReturnvaluesIF::RETURN_OK;
+  return returnvalue::OK;
 }
 
 cfdp::ConditionCode FinishedInfo::getConditionCode() const { return conditionCode; }
@@ -83,13 +82,13 @@ void FinishedInfo::setConditionCode(cfdp::ConditionCode conditionCode) {
   this->conditionCode = conditionCode;
 }
 
-cfdp::FinishedDeliveryCode FinishedInfo::getDeliveryCode() const { return deliveryCode; }
+cfdp::FileDeliveryCode FinishedInfo::getDeliveryCode() const { return deliveryCode; }
 
-void FinishedInfo::setDeliveryCode(cfdp::FinishedDeliveryCode deliveryCode) {
+void FinishedInfo::setDeliveryCode(cfdp::FileDeliveryCode deliveryCode) {
   this->deliveryCode = deliveryCode;
 }
 
-cfdp::FinishedFileStatus FinishedInfo::getFileStatus() const { return fileStatus; }
+cfdp::FileDeliveryStatus FinishedInfo::getFileStatus() const { return fileStatus; }
 
 void FinishedInfo::setFilestoreResponsesArrayLen(size_t fsResponsesLen) {
   this->fsResponsesLen = fsResponsesLen;
@@ -97,6 +96,6 @@ void FinishedInfo::setFilestoreResponsesArrayLen(size_t fsResponsesLen) {
 
 size_t FinishedInfo::getFsResponsesLen() const { return fsResponsesLen; }
 
-void FinishedInfo::setFileStatus(cfdp::FinishedFileStatus fileStatus) {
+void FinishedInfo::setFileStatus(cfdp::FileDeliveryStatus fileStatus) {
   this->fileStatus = fileStatus;
 }

src/fsfw/cfdp/pdu/FinishedInfo.h

@@ -8,13 +8,13 @@
 class FinishedInfo {
  public:
   FinishedInfo();
-  FinishedInfo(cfdp::ConditionCode conditionCode, cfdp::FinishedDeliveryCode deliveryCode,
-               cfdp::FinishedFileStatus fileStatus);
+  FinishedInfo(cfdp::ConditionCode conditionCode, cfdp::FileDeliveryCode deliveryCode,
+               cfdp::FileDeliveryStatus fileStatus);
 
-  size_t getSerializedSize() const;
+  [[nodiscard]] size_t getSerializedSize() const;
 
-  bool hasFsResponses() const;
-  bool canHoldFsResponses() const;
+  [[nodiscard]] bool hasFsResponses() const;
+  [[nodiscard]] bool canHoldFsResponses() const;
 
   ReturnValue_t setFilestoreResponsesArray(FilestoreResponseTlv** fsResponses,
                                            size_t* fsResponsesLen, const size_t* maxFsResponseLen);
@@ -22,20 +22,20 @@ class FinishedInfo {
 
   ReturnValue_t getFilestoreResonses(FilestoreResponseTlv*** fsResponses, size_t* fsResponsesLen,
                                      size_t* fsResponsesMaxLen);
-  size_t getFsResponsesLen() const;
+  [[nodiscard]] size_t getFsResponsesLen() const;
   void setFilestoreResponsesArrayLen(size_t fsResponsesLen);
   ReturnValue_t getFaultLocation(EntityIdTlv** entityId);
-  cfdp::ConditionCode getConditionCode() const;
+  [[nodiscard]] cfdp::ConditionCode getConditionCode() const;
   void setConditionCode(cfdp::ConditionCode conditionCode);
-  cfdp::FinishedDeliveryCode getDeliveryCode() const;
-  void setDeliveryCode(cfdp::FinishedDeliveryCode deliveryCode);
-  cfdp::FinishedFileStatus getFileStatus() const;
-  void setFileStatus(cfdp::FinishedFileStatus fileStatus);
+  [[nodiscard]] cfdp::FileDeliveryCode getDeliveryCode() const;
+  void setDeliveryCode(cfdp::FileDeliveryCode deliveryCode);
+  [[nodiscard]] cfdp::FileDeliveryStatus getFileStatus() const;
+  void setFileStatus(cfdp::FileDeliveryStatus fileStatus);
 
  private:
   cfdp::ConditionCode conditionCode = cfdp::ConditionCode::NO_CONDITION_FIELD;
-  cfdp::FinishedDeliveryCode deliveryCode = cfdp::FinishedDeliveryCode::DATA_COMPLETE;
-  cfdp::FinishedFileStatus fileStatus = cfdp::FinishedFileStatus::DISCARDED_DELIBERATELY;
+  cfdp::FileDeliveryCode deliveryCode = cfdp::FileDeliveryCode::DATA_COMPLETE;
+  cfdp::FileDeliveryStatus fileStatus = cfdp::FileDeliveryStatus::DISCARDED_DELIBERATELY;
   FilestoreResponseTlv** fsResponses = nullptr;
   size_t fsResponsesLen = 0;
   size_t fsResponsesMaxLen = 0;

src/fsfw/cfdp/pdu/FinishedPduDeserializer.cpp

@@ -2,24 +2,24 @@
 
 FinishPduDeserializer::FinishPduDeserializer(const uint8_t* pduBuf, size_t maxSize,
                                              FinishedInfo& info)
-    : FileDirectiveDeserializer(pduBuf, maxSize), finishedInfo(info) {}
+    : FileDirectiveReader(pduBuf, maxSize), finishedInfo(info) {}
 
 ReturnValue_t FinishPduDeserializer::parseData() {
-  ReturnValue_t result = FileDirectiveDeserializer::parseData();
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  ReturnValue_t result = FileDirectiveReader::parseData();
+  if (result != returnvalue::OK) {
     return result;
   }
-  size_t currentIdx = FileDirectiveDeserializer::getHeaderSize();
-  const uint8_t* buf = rawPtr + currentIdx;
-  size_t remSize = FileDirectiveDeserializer::getWholePduSize() - currentIdx;
+  size_t currentIdx = FileDirectiveReader::getHeaderSize();
+  const uint8_t* buf = pointers.rawPtr + currentIdx;
+  size_t remSize = FileDirectiveReader::getWholePduSize() - currentIdx;
   if (remSize < 1) {
     return SerializeIF::STREAM_TOO_SHORT;
   }
   uint8_t firstByte = *buf;
-  cfdp::ConditionCode condCode = static_cast<cfdp::ConditionCode>((firstByte >> 4) & 0x0f);
+  auto condCode = static_cast<cfdp::ConditionCode>((firstByte >> 4) & 0x0f);
   finishedInfo.setConditionCode(condCode);
-  finishedInfo.setDeliveryCode(static_cast<cfdp::FinishedDeliveryCode>(firstByte >> 2 & 0b1));
-  finishedInfo.setFileStatus(static_cast<cfdp::FinishedFileStatus>(firstByte & 0b11));
+  finishedInfo.setDeliveryCode(static_cast<cfdp::FileDeliveryCode>(firstByte >> 2 & 0b1));
+  finishedInfo.setFileStatus(static_cast<cfdp::FileDeliveryStatus>(firstByte & 0b11));
   buf += 1;
   remSize -= 1;
   currentIdx += 1;
@@ -33,7 +33,7 @@ FinishedInfo& FinishPduDeserializer::getInfo() { return finishedInfo; }
 
 ReturnValue_t FinishPduDeserializer::parseTlvs(size_t remLen, size_t currentIdx, const uint8_t* buf,
                                                cfdp::ConditionCode conditionCode) {
-  ReturnValue_t result = HasReturnvaluesIF::RETURN_OK;
+  ReturnValue_t result = returnvalue::OK;
   size_t fsResponsesIdx = 0;
   auto endianness = getEndianness();
   FilestoreResponseTlv** fsResponseArray = nullptr;
@@ -60,7 +60,7 @@ ReturnValue_t FinishPduDeserializer::parseTlvs(size_t remLen, size_t currentIdx,
         return cfdp::FINISHED_CANT_PARSE_FS_RESPONSES;
       }
       result = fsResponseArray[fsResponsesIdx]->deSerialize(&buf, &remLen, endianness);
-      if (result != HasReturnvaluesIF::RETURN_OK) {
+      if (result != returnvalue::OK) {
         return result;
       }
       fsResponsesIdx += 1;
@@ -72,11 +72,11 @@ ReturnValue_t FinishPduDeserializer::parseTlvs(size_t remLen, size_t currentIdx,
         return cfdp::INVALID_TLV_TYPE;
       }
       result = finishedInfo.getFaultLocation(&faultLocation);
-      if (result != HasReturnvaluesIF::RETURN_OK) {
+      if (result != returnvalue::OK) {
         return result;
       }
       result = faultLocation->deSerialize(&buf, &remLen, endianness);
-      if (result != HasReturnvaluesIF::RETURN_OK) {
+      if (result != returnvalue::OK) {
         return result;
       }
     } else {

src/fsfw/cfdp/pdu/FinishedPduDeserializer.h

@@ -1,10 +1,10 @@
 #ifndef FSFW_SRC_FSFW_CFDP_PDU_FINISHEDPDUDESERIALIZER_H_
 #define FSFW_SRC_FSFW_CFDP_PDU_FINISHEDPDUDESERIALIZER_H_
 
-#include "fsfw/cfdp/pdu/FileDirectiveDeserializer.h"
+#include "fsfw/cfdp/pdu/FileDirectiveReader.h"
 #include "fsfw/cfdp/pdu/FinishedInfo.h"
 
-class FinishPduDeserializer : public FileDirectiveDeserializer {
+class FinishPduDeserializer : public FileDirectiveReader {
  public:
   FinishPduDeserializer(const uint8_t* pduBuf, size_t maxSize, FinishedInfo& info);
 

src/fsfw/cfdp/pdu/FinishedPduSerializer.cpp

@@ -1,7 +1,7 @@
 #include "FinishedPduSerializer.h"
 
 FinishPduSerializer::FinishPduSerializer(PduConfig &conf, FinishedInfo &finishInfo)
-    : FileDirectiveSerializer(conf, cfdp::FileDirectives::FINISH, 0), finishInfo(finishInfo) {
+    : FileDirectiveCreator(conf, cfdp::FileDirectives::FINISH, 0), finishInfo(finishInfo) {
   updateDirectiveFieldLen();
 }
 
@@ -15,9 +15,8 @@ void FinishPduSerializer::updateDirectiveFieldLen() {
 
 ReturnValue_t FinishPduSerializer::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) {
+  ReturnValue_t result = FileDirectiveCreator::serialize(buffer, size, maxSize, streamEndianness);
+  if (result != returnvalue::OK) {
     return result;
   }
   if (*size + 1 >= maxSize) {
@@ -34,13 +33,13 @@ ReturnValue_t FinishPduSerializer::serialize(uint8_t **buffer, size_t *size, siz
     finishInfo.getFilestoreResonses(&fsResponsesArray, &fsResponsesArrayLen, nullptr);
     for (size_t idx = 0; idx < fsResponsesArrayLen; idx++) {
       result = fsResponsesArray[idx]->serialize(buffer, size, maxSize, streamEndianness);
-      if (result != HasReturnvaluesIF::RETURN_OK) {
+      if (result != returnvalue::OK) {
         return result;
       }
     }
   }
   EntityIdTlv *entityId = nullptr;
-  if (finishInfo.getFaultLocation(&entityId) == HasReturnvaluesIF::RETURN_OK) {
+  if (finishInfo.getFaultLocation(&entityId) == returnvalue::OK) {
     result = entityId->serialize(buffer, size, maxSize, streamEndianness);
   }
   return result;

src/fsfw/cfdp/pdu/FinishedPduSerializer.h

@@ -2,10 +2,10 @@
 #define FSFW_SRC_FSFW_CFDP_PDU_FINISHEDPDUSERIALIZER_H_
 
 #include "FinishedInfo.h"
-#include "fsfw/cfdp/pdu/FileDataSerializer.h"
-#include "fsfw/cfdp/pdu/FileDirectiveSerializer.h"
+#include "fsfw/cfdp/pdu/FileDataCreator.h"
+#include "fsfw/cfdp/pdu/FileDirectiveCreator.h"
 
-class FinishPduSerializer : public FileDirectiveSerializer {
+class FinishPduSerializer : public FileDirectiveCreator {
  public:
   FinishPduSerializer(PduConfig& pduConf, FinishedInfo& finishInfo);
 

src/fsfw/cfdp/pdu/HeaderCreator.cpp

@@ -0,0 +1,111 @@
+#include "HeaderCreator.h"
+
+HeaderCreator::HeaderCreator(PduConfig &pduConf, cfdp::PduType pduType, size_t initPduDataFieldLen,
+                             cfdp::SegmentMetadataFlag segmentMetadataFlag,
+                             cfdp::SegmentationControl segCtrl)
+    : pduType(pduType),
+      segmentMetadataFlag(segmentMetadataFlag),
+      segmentationCtrl(segCtrl),
+      pduDataFieldLen(initPduDataFieldLen),
+      pduConf(pduConf) {}
+
+ReturnValue_t HeaderCreator::serialize(uint8_t **buffer, size_t *size, size_t maxSize,
+                                       Endianness streamEndianness) const {
+  if (buffer == nullptr or size == nullptr) {
+    return returnvalue::FAILED;
+  }
+  if (maxSize < this->getSerializedSize()) {
+    return BUFFER_TOO_SHORT;
+  }
+  **buffer = cfdp::VERSION_BITS | this->pduType << 4 | pduConf.direction << 3 | pduConf.mode << 2 |
+             pduConf.crcFlag << 1 | pduConf.largeFile;
+  *buffer += 1;
+  **buffer = (pduDataFieldLen & 0xff00) >> 8;
+  *buffer += 1;
+  **buffer = pduDataFieldLen & 0x00ff;
+  *buffer += 1;
+  **buffer = segmentationCtrl << 7 | pduConf.sourceId.getWidth() << 4 | segmentMetadataFlag << 3 |
+             pduConf.seqNum.getWidth();
+  *buffer += 1;
+  *size += 4;
+  ReturnValue_t result = pduConf.sourceId.serialize(buffer, size, maxSize, streamEndianness);
+  if (result != returnvalue::OK) {
+    return result;
+  }
+  result = pduConf.seqNum.serialize(buffer, size, maxSize, streamEndianness);
+  if (result != returnvalue::OK) {
+    return result;
+  }
+  result = pduConf.destId.serialize(buffer, size, maxSize, streamEndianness);
+  if (result != returnvalue::OK) {
+    return result;
+  }
+
+  return returnvalue::OK;
+}
+
+size_t HeaderCreator::getSerializedSize() const {
+  return pduConf.seqNum.getWidth() + pduConf.sourceId.getWidth() * 2 + 4;
+}
+
+ReturnValue_t HeaderCreator::deSerialize(const uint8_t **buffer, size_t *size,
+                                         Endianness streamEndianness) {
+  // We could implement this, but I prefer dedicated classes
+  return returnvalue::FAILED;
+}
+
+size_t HeaderCreator::getWholePduSize() const {
+  // Return size of header plus the PDU data field length
+  return pduDataFieldLen + HeaderCreator::getSerializedSize();
+}
+
+size_t HeaderCreator::getPduDataFieldLen() const { return pduDataFieldLen; }
+
+void HeaderCreator::setPduDataFieldLen(size_t pduDataFieldLen_) {
+  pduDataFieldLen = pduDataFieldLen_;
+}
+
+void HeaderCreator::setPduType(cfdp::PduType pduType_) { pduType = pduType_; }
+
+void HeaderCreator::setSegmentMetadataFlag(cfdp::SegmentMetadataFlag segmentMetadataFlag_) {
+  segmentMetadataFlag = segmentMetadataFlag_;
+}
+
+cfdp::PduType HeaderCreator::getPduType() const { return pduType; }
+
+cfdp::Direction HeaderCreator::getDirection() const { return pduConf.direction; }
+
+cfdp::TransmissionModes HeaderCreator::getTransmissionMode() const { return pduConf.mode; }
+
+bool HeaderCreator::getCrcFlag() const { return pduConf.crcFlag; }
+
+bool HeaderCreator::getLargeFileFlag() const { return pduConf.largeFile; }
+
+cfdp::SegmentationControl HeaderCreator::getSegmentationControl() const { return segmentationCtrl; }
+
+cfdp::WidthInBytes HeaderCreator::getLenEntityIds() const { return pduConf.sourceId.getWidth(); }
+
+cfdp::WidthInBytes HeaderCreator::getLenSeqNum() const { return pduConf.seqNum.getWidth(); }
+
+cfdp::SegmentMetadataFlag HeaderCreator::getSegmentMetadataFlag() const {
+  return segmentMetadataFlag;
+}
+
+void HeaderCreator::getSourceId(cfdp::EntityId &sourceId) const { sourceId = pduConf.sourceId; }
+
+void HeaderCreator::getDestId(cfdp::EntityId &destId) const { destId = pduConf.destId; }
+
+void HeaderCreator::setSegmentationControl(cfdp::SegmentationControl segmentationControl) {
+  this->segmentationCtrl = segmentationControl;
+}
+
+void HeaderCreator::getTransactionSeqNum(cfdp::TransactionSeqNum &seqNum) const {
+  seqNum = pduConf.seqNum;
+}
+
+bool HeaderCreator::hasSegmentMetadataFlag() const {
+  if (this->segmentMetadataFlag == cfdp::SegmentMetadataFlag::PRESENT) {
+    return true;
+  }
+  return false;
+}

src/fsfw/cfdp/pdu/HeaderCreator.h

@@ -1,14 +1,14 @@
 #ifndef FSFW_SRC_FSFW_CFDP_PDU_HEADERSERIALIZER_H_
 #define FSFW_SRC_FSFW_CFDP_PDU_HEADERSERIALIZER_H_
 
-#include "../definitions.h"
 #include "PduConfig.h"
 #include "PduHeaderIF.h"
+#include "fsfw/cfdp/definitions.h"
 #include "fsfw/serialize/SerializeIF.h"
 
-class HeaderSerializer : public SerializeIF, public PduHeaderIF {
+class HeaderCreator : public SerializeIF, public PduHeaderIF {
  public:
-  HeaderSerializer(
+  HeaderCreator(
       PduConfig& pduConf, cfdp::PduType pduType, size_t initPduDataFieldLen,
       cfdp::SegmentMetadataFlag segmentMetadataFlag = cfdp::SegmentMetadataFlag::NOT_PRESENT,
       cfdp::SegmentationControl segCtrl =
@@ -23,7 +23,7 @@ class HeaderSerializer : public SerializeIF, public PduHeaderIF {
    * data field length was not properly.
    * @return
    */
-  size_t getSerializedSize() const override;
+  [[nodiscard]] size_t getSerializedSize() const override;
 
   ReturnValue_t deSerialize(const uint8_t** buffer, size_t* size,
                             Endianness streamEndianness) override;
@@ -32,19 +32,19 @@ class HeaderSerializer : public SerializeIF, public PduHeaderIF {
   void setPduType(cfdp::PduType pduType);
   void setSegmentMetadataFlag(cfdp::SegmentMetadataFlag);
 
-  size_t getPduDataFieldLen() const override;
-  size_t getWholePduSize() const override;
+  [[nodiscard]] size_t getPduDataFieldLen() const override;
+  [[nodiscard]] size_t getWholePduSize() const override;
 
-  cfdp::PduType getPduType() const override;
-  cfdp::Direction getDirection() const override;
-  cfdp::TransmissionModes getTransmissionMode() const override;
-  bool getCrcFlag() const override;
-  bool getLargeFileFlag() const override;
-  cfdp::SegmentationControl getSegmentationControl() const override;
-  cfdp::WidthInBytes getLenEntityIds() const override;
-  cfdp::WidthInBytes getLenSeqNum() const override;
-  cfdp::SegmentMetadataFlag getSegmentMetadataFlag() const override;
-  bool hasSegmentMetadataFlag() const override;
+  [[nodiscard]] cfdp::PduType getPduType() const override;
+  [[nodiscard]] cfdp::Direction getDirection() const override;
+  [[nodiscard]] cfdp::TransmissionModes getTransmissionMode() const override;
+  [[nodiscard]] bool getCrcFlag() const override;
+  [[nodiscard]] bool getLargeFileFlag() const override;
+  [[nodiscard]] cfdp::SegmentationControl getSegmentationControl() const override;
+  [[nodiscard]] cfdp::WidthInBytes getLenEntityIds() const override;
+  [[nodiscard]] cfdp::WidthInBytes getLenSeqNum() const override;
+  [[nodiscard]] cfdp::SegmentMetadataFlag getSegmentMetadataFlag() const override;
+  [[nodiscard]] bool hasSegmentMetadataFlag() const override;
   void setSegmentationControl(cfdp::SegmentationControl);
 
   void getSourceId(cfdp::EntityId& sourceId) const override;

src/fsfw/cfdp/pdu/HeaderDeserializer.cpp

@@ -1,128 +0,0 @@
-#include "HeaderDeserializer.h"
-
-#include <fsfw/serialize/SerializeAdapter.h>
-
-#include <cstring>
-
-HeaderDeserializer::HeaderDeserializer(const uint8_t *pduBuf, size_t maxSize)
-    : rawPtr(pduBuf), maxSize(maxSize) {}
-
-ReturnValue_t HeaderDeserializer::parseData() {
-  if (maxSize < 7) {
-    return SerializeIF::STREAM_TOO_SHORT;
-  }
-  return setData(const_cast<uint8_t *>(rawPtr), maxSize);
-}
-
-ReturnValue_t HeaderDeserializer::setData(uint8_t *dataPtr, size_t maxSize, void *args) {
-  if (dataPtr == nullptr) {
-    // Allowed for now
-    this->fixedHeader = nullptr;
-    return HasReturnvaluesIF::RETURN_OK;
-  }
-  this->fixedHeader = reinterpret_cast<PduHeaderFixedStruct *>(const_cast<uint8_t *>(dataPtr));
-  sourceIdRaw = static_cast<uint8_t *>(&fixedHeader->variableFieldsStart);
-  cfdp::WidthInBytes widthEntityIds = getLenEntityIds();
-  cfdp::WidthInBytes widthSeqNum = getLenSeqNum();
-  seqNumRaw = static_cast<uint8_t *>(sourceIdRaw) + static_cast<uint8_t>(widthEntityIds);
-  destIdRaw = static_cast<uint8_t *>(seqNumRaw) + static_cast<uint8_t>(widthSeqNum);
-  this->maxSize = maxSize;
-  return HasReturnvaluesIF::RETURN_OK;
-}
-
-size_t HeaderDeserializer::getHeaderSize() const {
-  if (fixedHeader != nullptr) {
-    return getLenEntityIds() * 2 + getLenSeqNum() + 4;
-  }
-  return 0;
-}
-
-size_t HeaderDeserializer::getPduDataFieldLen() const {
-  uint16_t pduFiedlLen = (fixedHeader->pduDataFieldLenH << 8) | fixedHeader->pduDataFieldLenL;
-  return pduFiedlLen;
-}
-
-size_t HeaderDeserializer::getWholePduSize() const {
-  return getPduDataFieldLen() + getHeaderSize();
-}
-
-cfdp::PduType HeaderDeserializer::getPduType() const {
-  return static_cast<cfdp::PduType>((fixedHeader->firstByte >> 4) & 0x01);
-}
-
-cfdp::Direction HeaderDeserializer::getDirection() const {
-  return static_cast<cfdp::Direction>((fixedHeader->firstByte >> 3) & 0x01);
-}
-
-cfdp::TransmissionModes HeaderDeserializer::getTransmissionMode() const {
-  return static_cast<cfdp::TransmissionModes>((fixedHeader->firstByte >> 2) & 0x01);
-}
-
-bool HeaderDeserializer::getCrcFlag() const { return (fixedHeader->firstByte >> 1) & 0x01; }
-
-bool HeaderDeserializer::getLargeFileFlag() const { return fixedHeader->firstByte & 0x01; }
-
-cfdp::SegmentationControl HeaderDeserializer::getSegmentationControl() const {
-  return static_cast<cfdp::SegmentationControl>((fixedHeader->fourthByte >> 7) & 0x01);
-}
-
-cfdp::WidthInBytes HeaderDeserializer::getLenEntityIds() const {
-  return static_cast<cfdp::WidthInBytes>((fixedHeader->fourthByte >> 4) & 0x07);
-}
-
-cfdp::WidthInBytes HeaderDeserializer::getLenSeqNum() const {
-  return static_cast<cfdp::WidthInBytes>(fixedHeader->fourthByte & 0x07);
-}
-
-cfdp::SegmentMetadataFlag HeaderDeserializer::getSegmentMetadataFlag() const {
-  return static_cast<cfdp::SegmentMetadataFlag>((fixedHeader->fourthByte >> 3) & 0x01);
-}
-
-void HeaderDeserializer::getSourceId(cfdp::EntityId &sourceId) const {
-  assignVarLenField(dynamic_cast<cfdp::VarLenField *>(&sourceId), getLenEntityIds(),
-                    this->sourceIdRaw);
-}
-
-void HeaderDeserializer::getDestId(cfdp::EntityId &destId) const {
-  assignVarLenField(dynamic_cast<cfdp::VarLenField *>(&destId), getLenEntityIds(), this->destIdRaw);
-}
-
-void HeaderDeserializer::getTransactionSeqNum(cfdp::TransactionSeqNum &seqNum) const {
-  assignVarLenField(dynamic_cast<cfdp::VarLenField *>(&seqNum), getLenSeqNum(), this->seqNumRaw);
-}
-
-void HeaderDeserializer::assignVarLenField(cfdp::VarLenField *field, cfdp::WidthInBytes width,
-                                           void *sourcePtr) const {
-  switch (width) {
-    case (cfdp::WidthInBytes::ONE_BYTE): {
-      uint8_t *fieldTyped = static_cast<uint8_t *>(sourcePtr);
-      field->setValue(width, *fieldTyped);
-      break;
-    }
-    case (cfdp::WidthInBytes::TWO_BYTES): {
-      uint16_t fieldTyped = 0;
-      size_t deserSize = 0;
-      SerializeAdapter::deSerialize(&fieldTyped, static_cast<uint8_t *>(sourcePtr), &deserSize,
-                                    SerializeIF::Endianness::NETWORK);
-      field->setValue(width, fieldTyped);
-      break;
-    }
-    case (cfdp::WidthInBytes::FOUR_BYTES): {
-      uint32_t fieldTyped = 0;
-      size_t deserSize = 0;
-      SerializeAdapter::deSerialize(&fieldTyped, static_cast<uint8_t *>(sourcePtr), &deserSize,
-                                    SerializeIF::Endianness::NETWORK);
-      field->setValue(width, fieldTyped);
-      break;
-    }
-  }
-}
-
-size_t HeaderDeserializer::getMaxSize() const { return maxSize; }
-
-bool HeaderDeserializer::hasSegmentMetadataFlag() const {
-  if (this->getSegmentMetadataFlag() == cfdp::SegmentMetadataFlag::PRESENT) {
-    return true;
-  }
-  return false;
-}

src/fsfw/cfdp/pdu/HeaderReader.cpp

@@ -0,0 +1,151 @@
+#include "HeaderReader.h"
+
+#include <fsfw/serialize/SerializeAdapter.h>
+
+#include <cstring>
+
+HeaderReader::HeaderReader(const uint8_t *pduBuf, size_t maxSize) { setData(pduBuf, maxSize); }
+
+ReturnValue_t HeaderReader::parseData() {
+  if (pointers.rawPtr == nullptr) {
+    return returnvalue::FAILED;
+  }
+  if (maxSize < 7) {
+    return SerializeIF::STREAM_TOO_SHORT;
+  }
+  pointers.fixedHeader =
+      reinterpret_cast<PduHeaderFixedStruct *>(const_cast<uint8_t *>(pointers.rawPtr));
+  sourceIdRaw = static_cast<uint8_t *>(&pointers.fixedHeader->variableFieldsStart);
+  cfdp::WidthInBytes widthEntityIds = getLenEntityIds();
+  cfdp::WidthInBytes widthSeqNum = getLenSeqNum();
+  seqNumRaw = static_cast<uint8_t *>(sourceIdRaw) + static_cast<uint8_t>(widthEntityIds);
+  destIdRaw = static_cast<uint8_t *>(seqNumRaw) + static_cast<uint8_t>(widthSeqNum);
+  return returnvalue::OK;
+}
+
+ReturnValue_t HeaderReader::setData(uint8_t *dataPtr, size_t maxSize_, void *args) {
+  if (dataPtr == nullptr) {
+    return returnvalue::FAILED;
+  }
+  if (maxSize_ < 7) {
+    return SerializeIF::STREAM_TOO_SHORT;
+  }
+  pointers.rawPtr = dataPtr;
+  maxSize = maxSize_;
+  return returnvalue::OK;
+}
+
+size_t HeaderReader::getHeaderSize() const {
+  if (pointers.fixedHeader != nullptr) {
+    return getLenEntityIds() * 2 + getLenSeqNum() + 4;
+  }
+  return 0;
+}
+
+size_t HeaderReader::getPduDataFieldLen() const {
+  return (pointers.fixedHeader->pduDataFieldLenH << 8) | pointers.fixedHeader->pduDataFieldLenL;
+}
+
+size_t HeaderReader::getWholePduSize() const {
+  return getPduDataFieldLen() + HeaderReader::getHeaderSize();
+}
+
+cfdp::PduType HeaderReader::getPduType() const {
+  return static_cast<cfdp::PduType>((pointers.fixedHeader->firstByte >> 4) & 0x01);
+}
+
+cfdp::Direction HeaderReader::getDirection() const {
+  return static_cast<cfdp::Direction>((pointers.fixedHeader->firstByte >> 3) & 0x01);
+}
+
+cfdp::TransmissionModes HeaderReader::getTransmissionMode() const {
+  return static_cast<cfdp::TransmissionModes>((pointers.fixedHeader->firstByte >> 2) & 0x01);
+}
+
+bool HeaderReader::getCrcFlag() const { return (pointers.fixedHeader->firstByte >> 1) & 0x01; }
+
+bool HeaderReader::getLargeFileFlag() const { return pointers.fixedHeader->firstByte & 0x01; }
+
+cfdp::SegmentationControl HeaderReader::getSegmentationControl() const {
+  return static_cast<cfdp::SegmentationControl>((pointers.fixedHeader->fourthByte >> 7) & 0x01);
+}
+
+cfdp::WidthInBytes HeaderReader::getLenEntityIds() const {
+  return static_cast<cfdp::WidthInBytes>((pointers.fixedHeader->fourthByte >> 4) & 0x07);
+}
+
+cfdp::WidthInBytes HeaderReader::getLenSeqNum() const {
+  return static_cast<cfdp::WidthInBytes>(pointers.fixedHeader->fourthByte & 0x07);
+}
+
+cfdp::SegmentMetadataFlag HeaderReader::getSegmentMetadataFlag() const {
+  return static_cast<cfdp::SegmentMetadataFlag>((pointers.fixedHeader->fourthByte >> 3) & 0x01);
+}
+
+void HeaderReader::getSourceId(cfdp::EntityId &sourceId) const {
+  assignVarLenField(dynamic_cast<cfdp::VarLenField *>(&sourceId), getLenEntityIds(),
+                    this->sourceIdRaw);
+}
+
+void HeaderReader::getDestId(cfdp::EntityId &destId) const {
+  assignVarLenField(dynamic_cast<cfdp::VarLenField *>(&destId), getLenEntityIds(), this->destIdRaw);
+}
+
+void HeaderReader::getTransactionSeqNum(cfdp::TransactionSeqNum &seqNum) const {
+  assignVarLenField(dynamic_cast<cfdp::VarLenField *>(&seqNum), getLenSeqNum(), this->seqNumRaw);
+}
+
+void HeaderReader::assignVarLenField(cfdp::VarLenField *field, cfdp::WidthInBytes width,
+                                     void *sourcePtr) const {
+  switch (width) {
+    case (cfdp::WidthInBytes::ONE_BYTE): {
+      auto *fieldTyped = static_cast<uint8_t *>(sourcePtr);
+      field->setValue(width, *fieldTyped);
+      break;
+    }
+    case (cfdp::WidthInBytes::TWO_BYTES): {
+      uint16_t fieldTyped = 0;
+      size_t deserSize = 0;
+      SerializeAdapter::deSerialize(&fieldTyped, static_cast<uint8_t *>(sourcePtr), &deserSize,
+                                    SerializeIF::Endianness::NETWORK);
+      field->setValue(width, fieldTyped);
+      break;
+    }
+    case (cfdp::WidthInBytes::FOUR_BYTES): {
+      uint32_t fieldTyped = 0;
+      size_t deserSize = 0;
+      SerializeAdapter::deSerialize(&fieldTyped, static_cast<uint8_t *>(sourcePtr), &deserSize,
+                                    SerializeIF::Endianness::NETWORK);
+      field->setValue(width, fieldTyped);
+      break;
+    }
+  }
+}
+
+size_t HeaderReader::getMaxSize() const { return maxSize; }
+
+bool HeaderReader::hasSegmentMetadataFlag() const {
+  if (this->getSegmentMetadataFlag() == cfdp::SegmentMetadataFlag::PRESENT) {
+    return true;
+  }
+  return false;
+}
+
+ReturnValue_t HeaderReader::setData(const uint8_t *dataPtr, size_t maxSize_) {
+  return setData(const_cast<uint8_t *>(dataPtr), maxSize_, nullptr);
+}
+bool HeaderReader::isNull() const {
+  return pointers.rawPtr == nullptr or pointers.fixedHeader == nullptr;
+}
+
+HeaderReader::operator bool() const { return not isNull(); }
+
+void HeaderReader::fillConfig(PduConfig &cfg) const {
+  cfg.largeFile = getLargeFileFlag();
+  cfg.crcFlag = getCrcFlag();
+  cfg.mode = getTransmissionMode();
+  cfg.direction = getDirection();
+  getTransactionSeqNum(cfg.seqNum);
+  getSourceId(cfg.sourceId);
+  getDestId(cfg.destId);
+}

src/fsfw/cfdp/pdu/HeaderReader.h

@@ -23,45 +23,57 @@ struct PduHeaderFixedStruct {
  * This is a zero-copy implementation and #parseData needs to be called to ensure the data is
  * valid.
  */
-class HeaderDeserializer : public RedirectableDataPointerIF, public PduHeaderIF {
+class HeaderReader : public RedirectableDataPointerIF, public PduHeaderIF {
  public:
+  HeaderReader() = default;
   /**
    * Initialize a PDU header from raw data. This is a zero-copy implementation and #parseData
    * needs to be called to ensure the data is valid
    * @param pduBuf
    * @param maxSize
    */
-  HeaderDeserializer(const uint8_t* pduBuf, size_t maxSize);
+  HeaderReader(const uint8_t* pduBuf, size_t maxSize);
 
   /**
    * This needs to be called before accessing the PDU fields to avoid segmentation faults.
    * @return
-   *  - RETURN_OK on parse success
-   *  - RETURN_FAILED Invalid raw data
+   *  - returnvalue::OK on parse success
+   *  - returnvalue::FAILED Invalid raw data
    *  - SerializeIF::BUFFER_TOO_SHORT if buffer is shorter than expected
    */
   virtual ReturnValue_t parseData();
-  size_t getHeaderSize() const;
+  explicit operator bool() const;
+  [[nodiscard]] bool isNull() const;
 
-  size_t getPduDataFieldLen() const override;
-  size_t getWholePduSize() const override;
+  /**
+   * Fill the provided PDU configuration from the fields detected by this reader.
+   * @param cfg
+   */
+  void fillConfig(PduConfig& cfg) const;
 
-  cfdp::PduType getPduType() const override;
-  cfdp::Direction getDirection() const override;
-  cfdp::TransmissionModes getTransmissionMode() const override;
-  bool getCrcFlag() const override;
-  bool getLargeFileFlag() const override;
-  cfdp::SegmentationControl getSegmentationControl() const override;
-  cfdp::WidthInBytes getLenEntityIds() const override;
-  cfdp::WidthInBytes getLenSeqNum() const override;
-  cfdp::SegmentMetadataFlag getSegmentMetadataFlag() const override;
-  bool hasSegmentMetadataFlag() const override;
+  [[nodiscard]] virtual size_t getHeaderSize() const;
+
+  [[nodiscard]] size_t getPduDataFieldLen() const override;
+  [[nodiscard]] size_t getWholePduSize() const override;
+
+  [[nodiscard]] cfdp::PduType getPduType() const override;
+  [[nodiscard]] cfdp::Direction getDirection() const override;
+  [[nodiscard]] cfdp::TransmissionModes getTransmissionMode() const override;
+  [[nodiscard]] bool getCrcFlag() const override;
+  [[nodiscard]] bool getLargeFileFlag() const override;
+  [[nodiscard]] cfdp::SegmentationControl getSegmentationControl() const override;
+  [[nodiscard]] cfdp::WidthInBytes getLenEntityIds() const override;
+  [[nodiscard]] cfdp::WidthInBytes getLenSeqNum() const override;
+  [[nodiscard]] cfdp::SegmentMetadataFlag getSegmentMetadataFlag() const override;
+  [[nodiscard]] bool hasSegmentMetadataFlag() const override;
 
   void getSourceId(cfdp::EntityId& sourceId) const override;
   void getDestId(cfdp::EntityId& destId) const override;
   void getTransactionSeqNum(cfdp::TransactionSeqNum& seqNum) const override;
 
-  ReturnValue_t deserResult = HasReturnvaluesIF::RETURN_OK;
+  ReturnValue_t deserResult = returnvalue::OK;
+
+  [[nodiscard]] size_t getMaxSize() const;
 
   /**
    * Can also be used to reset the pointer to a nullptr, but the getter functions will not
@@ -71,16 +83,27 @@ class HeaderDeserializer : public RedirectableDataPointerIF, public PduHeaderIF
    * @param args
    * @return
    */
-  ReturnValue_t setData(uint8_t* dataPtr, size_t maxSize, void* args = nullptr) override;
-
-  size_t getMaxSize() const;
+  ReturnValue_t setData(const uint8_t* dataPtr, size_t maxSize);
 
  protected:
-  PduHeaderFixedStruct* fixedHeader = nullptr;
-  const uint8_t* rawPtr = nullptr;
+  struct Pointers {
+    PduHeaderFixedStruct* fixedHeader = nullptr;
+    const uint8_t* rawPtr = nullptr;
+  };
+
+  Pointers pointers;
   size_t maxSize = 0;
 
  private:
+  /**
+   * Can also be used to reset the pointer to a nullptr, but the getter functions will not
+   * perform nullptr checks!
+   * @param dataPtr
+   * @param maxSize
+   * @param args
+   * @return
+   */
+  ReturnValue_t setData(uint8_t* dataPtr, size_t maxSize, void* args) override;
   void assignVarLenField(cfdp::VarLenField* field, cfdp::WidthInBytes width, void* sourcePtr) const;
   void* sourceIdRaw = nullptr;
   void* seqNumRaw = nullptr;

src/fsfw/cfdp/pdu/HeaderSerializer.cpp

@@ -1,117 +0,0 @@
-#include "HeaderSerializer.h"
-
-#include "HeaderDeserializer.h"
-
-HeaderSerializer::HeaderSerializer(PduConfig &pduConf, cfdp::PduType pduType,
-                                   size_t initPduDataFieldLen,
-                                   cfdp::SegmentMetadataFlag segmentMetadataFlag,
-                                   cfdp::SegmentationControl segCtrl)
-    : pduType(pduType),
-      segmentMetadataFlag(segmentMetadataFlag),
-      segmentationCtrl(segCtrl),
-      pduDataFieldLen(initPduDataFieldLen),
-      pduConf(pduConf) {}
-
-ReturnValue_t HeaderSerializer::serialize(uint8_t **buffer, size_t *size, size_t maxSize,
-                                          Endianness streamEndianness) const {
-  if (buffer == nullptr or size == nullptr) {
-    return HasReturnvaluesIF::RETURN_FAILED;
-  }
-  if (maxSize < this->getSerializedSize()) {
-    return BUFFER_TOO_SHORT;
-  }
-  **buffer = cfdp::VERSION_BITS | this->pduType << 4 | pduConf.direction << 3 | pduConf.mode << 2 |
-             pduConf.crcFlag << 1 | pduConf.largeFile;
-  *buffer += 1;
-  **buffer = (pduDataFieldLen & 0xff00) >> 8;
-  *buffer += 1;
-  **buffer = pduDataFieldLen & 0x00ff;
-  *buffer += 1;
-  **buffer = segmentationCtrl << 7 | pduConf.sourceId.getWidth() << 4 | segmentMetadataFlag << 3 |
-             pduConf.seqNum.getWidth();
-  *buffer += 1;
-  *size += 4;
-  ReturnValue_t result = pduConf.sourceId.serialize(buffer, size, maxSize, streamEndianness);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
-    return result;
-  }
-  result = pduConf.seqNum.serialize(buffer, size, maxSize, streamEndianness);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
-    return result;
-  }
-  result = pduConf.destId.serialize(buffer, size, maxSize, streamEndianness);
-  if (result != HasReturnvaluesIF::RETURN_OK) {
-    return result;
-  }
-
-  return HasReturnvaluesIF::RETURN_OK;
-}
-
-size_t HeaderSerializer::getSerializedSize() const {
-  size_t shit = pduConf.seqNum.getWidth() + pduConf.sourceId.getWidth() * 2 + 4;
-  return shit;
-}
-
-ReturnValue_t HeaderSerializer::deSerialize(const uint8_t **buffer, size_t *size,
-                                            Endianness streamEndianness) {
-  // We could implement this, but I prefer dedicated classes
-  return HasReturnvaluesIF::RETURN_FAILED;
-}
-
-size_t HeaderSerializer::getWholePduSize() const {
-  // Return size of header plus the PDU data field length
-  return pduDataFieldLen + HeaderSerializer::getSerializedSize();
-}
-
-size_t HeaderSerializer::getPduDataFieldLen() const { return pduDataFieldLen; }
-
-void HeaderSerializer::setPduDataFieldLen(size_t pduDataFieldLen) {
-  this->pduDataFieldLen = pduDataFieldLen;
-}
-
-void HeaderSerializer::setPduType(cfdp::PduType pduType) { this->pduType = pduType; }
-
-void HeaderSerializer::setSegmentMetadataFlag(cfdp::SegmentMetadataFlag segmentMetadataFlag) {
-  this->segmentMetadataFlag = segmentMetadataFlag;
-}
-
-cfdp::PduType HeaderSerializer::getPduType() const { return pduType; }
-
-cfdp::Direction HeaderSerializer::getDirection() const { return pduConf.direction; }
-
-cfdp::TransmissionModes HeaderSerializer::getTransmissionMode() const { return pduConf.mode; }
-
-bool HeaderSerializer::getCrcFlag() const { return pduConf.crcFlag; }
-
-bool HeaderSerializer::getLargeFileFlag() const { return pduConf.largeFile; }
-
-cfdp::SegmentationControl HeaderSerializer::getSegmentationControl() const {
-  return segmentationCtrl;
-}
-
-cfdp::WidthInBytes HeaderSerializer::getLenEntityIds() const { return pduConf.sourceId.getWidth(); }
-
-cfdp::WidthInBytes HeaderSerializer::getLenSeqNum() const { return pduConf.seqNum.getWidth(); }
-
-cfdp::SegmentMetadataFlag HeaderSerializer::getSegmentMetadataFlag() const {
-  return segmentMetadataFlag;
-}
-
-void HeaderSerializer::getSourceId(cfdp::EntityId &sourceId) const { sourceId = pduConf.sourceId; }
-
-void HeaderSerializer::getDestId(cfdp::EntityId &destId) const { destId = pduConf.destId; }
-
-void HeaderSerializer::setSegmentationControl(cfdp::SegmentationControl segmentationControl) {
-  this->segmentationCtrl = segmentationControl;
-}
-
-void HeaderSerializer::getTransactionSeqNum(cfdp::TransactionSeqNum &seqNum) const {
-  seqNum = pduConf.seqNum;
-}
-
-bool HeaderSerializer::hasSegmentMetadataFlag() const {
-  if (this->segmentMetadataFlag == cfdp::SegmentMetadataFlag::PRESENT) {
-    return true;
-  }
-  return false;
-}

src/fsfw/cfdp/pdu/KeepAlivePduDeserializer.cpp

@@ -2,16 +2,16 @@
 
 KeepAlivePduDeserializer::KeepAlivePduDeserializer(const uint8_t* pduBuf, size_t maxSize,
                                                    cfdp::FileSize& progress)
-    : FileDirectiveDeserializer(pduBuf, maxSize), progress(progress) {}
+    : FileDirectiveReader(pduBuf, maxSize), progress(progress) {}
 
 ReturnValue_t KeepAlivePduDeserializer::parseData() {
-  ReturnValue_t result = FileDirectiveDeserializer::parseData();
-  if (result != HasReturnvaluesIF::RETURN_OK) {
+  ReturnValue_t result = FileDirectiveReader::parseData();
+  if (result != returnvalue::OK) {
     return result;
   }
-  size_t currentIdx = FileDirectiveDeserializer::getHeaderSize();
-  size_t remLen = FileDirectiveDeserializer::getWholePduSize() - currentIdx;
-  const uint8_t* buffer = rawPtr + currentIdx;
+  size_t currentIdx = FileDirectiveReader::getHeaderSize();
+  size_t remLen = FileDirectiveReader::getWholePduSize() - currentIdx;
+  const uint8_t* buffer = pointers.rawPtr + currentIdx;
   return progress.deSerialize(&buffer, &remLen, getEndianness());
 }
 

src/fsfw/cfdp/pdu/KeepAlivePduDeserializer.h

@@ -2,9 +2,9 @@
 #define FSFW_SRC_FSFW_CFDP_PDU_KEEPALIVEPDUDESERIALIZER_H_
 
 #include "fsfw/cfdp/FileSize.h"
-#include "fsfw/cfdp/pdu/FileDirectiveDeserializer.h"
+#include "fsfw/cfdp/pdu/FileDirectiveReader.h"
 
-class KeepAlivePduDeserializer : public FileDirectiveDeserializer {
+class KeepAlivePduDeserializer : public FileDirectiveReader {
  public:
   KeepAlivePduDeserializer(const uint8_t* pduBuf, size_t maxSize, cfdp::FileSize& progress);
 

src/fsfw/cfdp/pdu/KeepAlivePduSerializer.cpp

@@ -1,12 +1,12 @@
 #include "KeepAlivePduSerializer.h"
 
 KeepAlivePduSerializer::KeepAlivePduSerializer(PduConfig &conf, cfdp::FileSize &progress)
-    : FileDirectiveSerializer(conf, cfdp::FileDirectives::KEEP_ALIVE, 4), progress(progress) {
+    : FileDirectiveCreator(conf, cfdp::FileDirectives::KEEP_ALIVE, 4), progress(progress) {
   updateDirectiveFieldLen();
 }
 
 size_t KeepAlivePduSerializer::getSerializedSize() const {
-  return FileDirectiveSerializer::getWholePduSize();
+  return FileDirectiveCreator::getWholePduSize();
 }
 
 void KeepAlivePduSerializer::updateDirectiveFieldLen() {
@@ -17,9 +17,8 @@ void KeepAlivePduSerializer::updateDirectiveFieldLen() {
 
 ReturnValue_t KeepAlivePduSerializer::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) {
+  ReturnValue_t result = FileDirectiveCreator::serialize(buffer, size, maxSize, streamEndianness);
+  if (result != returnvalue::OK) {
     return result;
   }
   return progress.serialize(this->getLargeFileFlag(), buffer, size, maxSize, streamEndianness);

src/fsfw/cfdp/pdu/KeepAlivePduSerializer.h

@@ -2,9 +2,9 @@
 #define FSFW_SRC_FSFW_CFDP_PDU_KEEPALIVEPDUSERIALIZER_H_
 
 #include "fsfw/cfdp/FileSize.h"
-#include "fsfw/cfdp/pdu/FileDirectiveSerializer.h"
+#include "fsfw/cfdp/pdu/FileDirectiveCreator.h"
 
-class KeepAlivePduSerializer : public FileDirectiveSerializer {
+class KeepAlivePduSerializer : public FileDirectiveCreator {
  public:
   KeepAlivePduSerializer(PduConfig& conf, cfdp::FileSize& progress);
 

src/fsfw/cfdp/pdu/MetadataInfo.cpp

@@ -1,54 +1,57 @@
 #include "MetadataInfo.h"
 
 MetadataInfo::MetadataInfo(bool closureRequested, cfdp::ChecksumType checksumType,
-                           cfdp::FileSize& fileSize, cfdp::Lv& sourceFileName,
-                           cfdp::Lv& destFileName)
-    : closureRequested(closureRequested),
-      checksumType(checksumType),
-      fileSize(fileSize),
-      sourceFileName(sourceFileName),
-      destFileName(destFileName) {}
+                           cfdp::FileSize& fileSize, cfdp::StringLv& sourceFileName,
+                           cfdp::StringLv& destFileName)
+    : MetadataInfo(fileSize, sourceFileName, destFileName) {
+  this->closureRequested = closureRequested;
+  this->checksumType = checksumType;
+}
 
-void MetadataInfo::setOptionsArray(cfdp::Tlv** optionsArray, size_t* optionsLen,
-                                   size_t* maxOptionsLen) {
-  this->optionsArray = optionsArray;
-  if (maxOptionsLen != nullptr) {
-    this->maxOptionsLen = *maxOptionsLen;
+MetadataInfo::MetadataInfo(cfdp::FileSize& fileSize, cfdp::StringLv& sourceFileName,
+                           cfdp::StringLv& destFileName)
+    : fileSize(fileSize), sourceFileName(sourceFileName), destFileName(destFileName) {}
+
+void MetadataInfo::setOptionsArray(cfdp::Tlv** optionsArray_, std::optional<size_t> optionsLen_,
+                                   std::optional<size_t> maxOptionsLen_) {
+  this->optionsArray = optionsArray_;
+  if (maxOptionsLen_) {
+    this->maxOptionsLen = maxOptionsLen_.value();
   }
-  if (optionsLen != nullptr) {
-    this->optionsLen = *optionsLen;
+  if (optionsLen_) {
+    this->optionsLen = optionsLen_.value();
   }
 }
 
 cfdp::ChecksumType MetadataInfo::getChecksumType() const { return checksumType; }
 
-void MetadataInfo::setChecksumType(cfdp::ChecksumType checksumType) {
-  this->checksumType = checksumType;
+void MetadataInfo::setChecksumType(cfdp::ChecksumType checksumType_) {
+  checksumType = checksumType_;
 }
 
 bool MetadataInfo::isClosureRequested() const { return closureRequested; }
 
-void MetadataInfo::setClosureRequested(bool closureRequested) {
-  this->closureRequested = closureRequested;
+void MetadataInfo::setClosureRequested(bool closureRequested_) {
+  closureRequested = closureRequested_;
 }
 
-cfdp::Lv& MetadataInfo::getDestFileName() { return destFileName; }
+cfdp::StringLv& MetadataInfo::getDestFileName() { return destFileName; }
 
 cfdp::FileSize& MetadataInfo::getFileSize() { return fileSize; }
 
-ReturnValue_t MetadataInfo::getOptions(cfdp::Tlv*** optionsArray, size_t* optionsLen,
+ReturnValue_t MetadataInfo::getOptions(cfdp::Tlv*** optionsArray_, size_t* optionsLen_,
                                        size_t* maxOptsLen) {
-  if (optionsArray == nullptr or this->optionsArray == nullptr) {
-    return HasReturnvaluesIF::RETURN_FAILED;
+  if (optionsArray_ == nullptr or optionsArray == nullptr) {
+    return returnvalue::FAILED;
   }
-  *optionsArray = this->optionsArray;
-  if (optionsLen != nullptr) {
-    *optionsLen = this->optionsLen;
+  *optionsArray_ = optionsArray;
+  if (optionsLen_ != nullptr) {
+    *optionsLen_ = this->optionsLen;
   }
   if (maxOptsLen != nullptr) {
     *maxOptsLen = this->maxOptionsLen;
   }
-  return HasReturnvaluesIF::RETURN_OK;
+  return returnvalue::OK;
 }
 
 bool MetadataInfo::hasOptions() const {
@@ -81,18 +84,20 @@ size_t MetadataInfo::getSerializedSize(bool fssLarge) {
   return size;
 }
 
-void MetadataInfo::setDestFileName(cfdp::Lv& destFileName) { this->destFileName = destFileName; }
+void MetadataInfo::setDestFileName(cfdp::StringLv& destFileName_) {
+  this->destFileName = destFileName_;
+}
 
-void MetadataInfo::setSourceFileName(cfdp::Lv& sourceFileName) {
-  this->sourceFileName = sourceFileName;
+void MetadataInfo::setSourceFileName(cfdp::StringLv& sourceFileName_) {
+  this->sourceFileName = sourceFileName_;
 }
 
 size_t MetadataInfo::getMaxOptionsLen() const { return maxOptionsLen; }
 
-void MetadataInfo::setMaxOptionsLen(size_t maxOptionsLen) { this->maxOptionsLen = maxOptionsLen; }
+void MetadataInfo::setMaxOptionsLen(size_t maxOptionsLen_) { this->maxOptionsLen = maxOptionsLen_; }
 
 size_t MetadataInfo::getOptionsLen() const { return optionsLen; }
 
-void MetadataInfo::setOptionsLen(size_t optionsLen) { this->optionsLen = optionsLen; }
+void MetadataInfo::setOptionsLen(size_t optionsLen_) { this->optionsLen = optionsLen_; }
 
-cfdp::Lv& MetadataInfo::getSourceFileName() { return sourceFileName; }
+cfdp::StringLv& MetadataInfo::getSourceFileName() { return sourceFileName; }