Merge pull request 'Added CFDP packet stack' (#528) from KSat/fsfw:mueller/cfdp-pdus into development
All checks were successful
fsfw/fsfw/pipeline/head This commit looks good

Reviewed-on: #528
This commit is contained in:
Robin Müller 2022-02-02 10:27:39 +01:00
commit 70b593df65
161 changed files with 7787 additions and 1110 deletions

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

83
src/fsfw/cfdp/FileSize.h Normal file
View File

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

153
src/fsfw/cfdp/definitions.h Normal file
View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

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

View File

@ -0,0 +1,41 @@ </