fsfw/tmtcpacket/pus/TcPacketStoredBase.h

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2021-06-13 16:29:13 +02:00
#ifndef TMTCPACKET_PUS_TCPACKETSTORED_H_
#define TMTCPACKET_PUS_TCPACKETSTORED_H_
#include <fsfw/tmtcpacket/pus/TcPacketStoredIF.h>
#include "../../storagemanager/StorageManagerIF.h"
/**
* This class generates a ECSS PUS Telecommand packet within a given
* intermediate storage.
* As most packets are passed between tasks with the help of a storage
* anyway, it seems logical to create a Packet-In-Storage access class
* which saves the user almost all storage handling operation.
* Packets can both be newly created with the class and be "linked" to
* packets in a store with the help of a storeAddress.
* @ingroup tmtcpackets
*/
class TcPacketStoredBase: public TcPacketStoredIF {
public:
/**
* This is a default constructor which does not set the data pointer to initialize
* with an empty cached store address
*/
TcPacketStoredBase();
/**
* Constructor to set to an existing store address.
* @param setAddress
*/
TcPacketStoredBase(store_address_t setAddress);
/**
* Another constructor to create a TcPacket from a raw packet stream.
* Takes the data and adds it unchecked to the TcStore.
* @param data Pointer to the complete TC Space Packet.
* @param Size size of the packet.
*/
TcPacketStoredBase(const uint8_t* data, uint32_t size);
virtual~ TcPacketStoredBase();
/**
* Getter function for the raw data.
* @param dataPtr [out] Pointer to the data pointer to set
* @param dataSize [out] Address of size to set.
* @return -@c RETURN_OK if data was retrieved successfully.
*/
ReturnValue_t getData(const uint8_t ** dataPtr, size_t* dataSize) override;
void setStoreAddress(store_address_t setAddress) override;
store_address_t getStoreAddress() override;
/**
* With this call, the packet is deleted.
* It removes itself from the store and sets its data pointer to NULL.
* @return returncode from deleting the data.
*/
virtual ReturnValue_t deletePacket() = 0;
/**
* This method performs a size check.
* It reads the stored size and compares it with the size entered in the
* packet header. This class is the optimal place for such a check as it
* has access to both the header data and the store.
* @return true if size is correct, false if packet is not registered in
* store or size is incorrect.
*/
virtual bool isSizeCorrect() = 0;
protected:
/**
* This is a pointer to the store all instances of the class use.
* If the store is not yet set (i.e. @c store is NULL), every constructor
* call tries to set it and throws an error message in case of failures.
* The default store is objects::TC_STORE.
*/
static StorageManagerIF* store;
/**
* The address where the packet data of the object instance is stored.
*/
store_address_t storeAddress;
/**
* A helper method to check if a store is assigned to the class.
* If not, the method tries to retrieve the store from the global
* ObjectManager.
* @return @li @c true if the store is linked or could be created.
* @li @c false otherwise.
*/
bool checkAndSetStore();
};
#endif /* TMTCPACKET_PUS_TcPacketStoredBase_H_ */