fsfw/src/fsfw/cfdp/CFDPHandler.h
Robin Mueller 0ac1d1c1ca Added CFDP packet stack
This PR adds the packet stack for the CCSDS File Delivery Protocol.
It also refactors the existing TMTC infastructure to allow sending
of CFDP packets to the CCSDS handlers.

This includes the whole PDU (Protocol Data Unit) stack:

- File Data PDUs

and all file directive PDUs

- ACK PDU
- NAK PDU
- Metadata PDU
- Finished PDU
- Prompt PDU
- Keep Alive PDU
- EOF PDU

The PR includes a full set of unittests for the packet stack
with a coverage of 90+ %.

The refactoring of the existing TMTC infastructure includes non-ideal
solutions like diamond inheritance.
Avoiding this solution would require refactoring the packet stack.
This would be a good idea anyway because the existing stack is tightly
coupled to the FSFW, making reuse more difficult if only the stack is
planned to be used without the store functionalities etc.

The PDU implementation provided here is only weakly coupled to the FSFW,
only using components like returnvalues or the Serialization modules.
There are dedicated serializers and deserializers, which also helps in
creating small focused modules which are easy to test.

Some of the modules here were provied by Matthias Tompert.
2021-12-03 15:33:07 +01:00

63 lines
1.8 KiB
C++

#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_ */