fsfw/tcdistribution/TcPacketCheck.h
2020-08-13 20:53:35 +02:00

60 lines
2.1 KiB
C++

#ifndef TCPACKETCHECK_H_
#define TCPACKETCHECK_H_
#include "../returnvalues/HasReturnvaluesIF.h"
#include "../tmtcpacket/pus/TcPacketStored.h"
#include "../tmtcservices/PusVerificationReport.h"
/**
* This class performs a formal packet check for incoming PUS Telecommand Packets.
* Currently, it only checks if the APID and CRC are correct.
* \ingroup tc_distribution
*/
class TcPacketCheck : public HasReturnvaluesIF {
protected:
/**
* Describes the version number a packet must have to pass.
*/
static const uint8_t CCSDS_VERSION_NUMBER = 0;
/**
* Describes the secondary header a packet must have to pass.
*/
static const uint8_t CCSDS_SECONDARY_HEADER_FLAG = 0;
/**
* Describes the TC Packet PUS Version Number a packet must have to pass.
*/
static const uint8_t PUS_VERSION_NUMBER = 1;
/**
* The packet id each correct packet should have.
* It is composed of the APID and some static fields.
*/
uint16_t apid;
public:
static const uint8_t INTERFACE_ID = CLASS_ID::TC_PACKET_CHECK;
static const ReturnValue_t ILLEGAL_APID = MAKE_RETURN_CODE( 0 );
static const ReturnValue_t INCOMPLETE_PACKET = MAKE_RETURN_CODE( 1 );
static const ReturnValue_t INCORRECT_CHECKSUM = MAKE_RETURN_CODE( 2 );
static const ReturnValue_t ILLEGAL_PACKET_TYPE = MAKE_RETURN_CODE( 3 );
static const ReturnValue_t ILLEGAL_PACKET_SUBTYPE = MAKE_RETURN_CODE( 4 );
static const ReturnValue_t INCORRECT_PRIMARY_HEADER = MAKE_RETURN_CODE( 5 );
static const ReturnValue_t INCORRECT_SECONDARY_HEADER = MAKE_RETURN_CODE( 6 );
/**
* The constructor only sets the APID attribute.
* @param set_apid The APID to set.
*/
TcPacketCheck( uint16_t set_apid );
/**
* This is the actual method to formally check a certain Telecommand Packet.
* The packet's Application Data can not be checked here.
* @param current_packet The packt to check
* @return - \c RETURN_OK on success.
* - \c INCORRECT_CHECKSUM if checksum is invalid.
* - \c ILLEGAL_APID if APID does not match.
*/
ReturnValue_t checkPacket( TcPacketStored* current_packet );
uint16_t getApid() const;
};
#endif /* TCPACKETCHECK_H_ */