Robin Mueller
5907f8ee9d
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.
65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
#ifndef FSFW_SRC_FSFW_CFDP_TLV_H_
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#define FSFW_SRC_FSFW_CFDP_TLV_H_
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#include "TlvIF.h"
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#include "fsfw/serialize/SerialBufferAdapter.h"
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namespace cfdp {
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/**
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* @brief Type-Length-Value field implementation
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* @details
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* Thin abstraction layer around a serial buffer adapter
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*/
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class Tlv: public TlvIF {
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public:
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Tlv(TlvTypes type, const uint8_t *value, size_t size);
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Tlv();
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/**
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* Serialize a TLV into a given buffer
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* @param buffer
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* @param size
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* @param maxSize
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* @param streamEndianness
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* @return
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* - RETURN_OK on success
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* - INVALID_TLV_TYPE
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* - SerializeIF returncode on wrong serialization parameters
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*/
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virtual ReturnValue_t serialize(uint8_t **buffer, size_t *size,
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size_t maxSize, Endianness streamEndianness) const override;
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virtual size_t getSerializedSize() const override;
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/**
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* @brief Deserialize a LV field from a raw buffer. Zero-copy implementation
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* @param buffer Raw buffer including the size field
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* @param size
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* @param streamEndianness
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* - RETURN_OK on success
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* - INVALID_TLV_TYPE
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* - SerializeIF returncode on wrong deserialization parameters
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*/
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virtual ReturnValue_t deSerialize(const uint8_t **buffer, size_t *size,
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Endianness streamEndianness) override;
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void setValue(uint8_t *value, size_t len);
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const uint8_t* getValue() const;
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void setType(TlvTypes type);
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TlvTypes getType() const override;
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uint8_t getLengthField() const override;
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private:
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bool checkType(uint8_t rawType);
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bool zeroLen = true;
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TlvTypes type = TlvTypes::INVALID_TLV;
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SerialBufferAdapter<uint8_t> value;
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};
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}
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#endif /* FSFW_SRC_FSFW_CFDP_TLV_H_ */
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