84 lines
2 KiB
C
84 lines
2 KiB
C
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#ifndef bcmutils_H
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#define bcmutils_H
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typedef struct
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{
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uint16_t magic;
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uint16_t control;
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uint16_t rev_maj;
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uint16_t rev_min;
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uint32_t build_date;
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uint32_t filelen;
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uint32_t ldaddress;
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char filename[64];
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uint16_t hcs;
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uint16_t her_znaet_chto; //v dushe ne ebu
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uint32_t crc;
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} ldr_header_t;
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/**
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* Reverses endianess of a 32bit int, if the ENDIAN_REVERSE_NEEDED defined at compile-time
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* @param data
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* @return
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*/
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uint32_t reverse_endian32 ( uint32_t data );
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/**
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* Reverses endianess of a 16bit int, if the ENDIAN_REVERSE_NEEDED defined at compile-time
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* @param data
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* @return
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*/
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uint16_t reverse_endian16 ( uint16_t data );
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/**
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* Calculates the strange crc (used by bcm modems) of the file. Thnx fly out to Vector for the algorithm.
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* @param filename
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* @return
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*/
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uint32_t get_file_crc ( char* filename );
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/**
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* Calculates HCS of the header.
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* @param hd
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* @return
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*/
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uint16_t get_hcs ( ldr_header_t* hd );
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/**
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* Constructs the header of the image with the information given It also automagically calculates HCS and writes it there.
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* @param magic - magic device bytes
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* @param rev_maj - major revision
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* @param rev_min - minor revision
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* @param build_date - build date (seconds from EPOCH UTC)
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* @param filelen - file length in bytes
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* @param ldaddress - Load adress
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* @param filename - filename
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* @param crc_data - the crc of the data
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* @return
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*/
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ldr_header_t* construct_header ( uint32_t magic, uint16_t rev_maj,uint16_t rev_min, uint32_t build_date, uint32_t filelen, uint32_t ldaddress, const char* filename, uint32_t crc_data );
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/**
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* Dumps header information to stdout.
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* @param hd
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*/
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int dump_header ( ldr_header_t* hd );
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/**
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* Returns a null terminated string describing what the control number meens
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* DO NOT FREE IT!!!
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* @param control
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* @return
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*/
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char* get_control_info ( uint16_t control );
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#endif
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/**
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* Calculates bcmCRC of a data buffer.
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* @param filebuffer - pointer to buffer
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* @param size - buffer size
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* @return
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*/
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uint32_t get_buffer_crc ( char* filebuffer, size_t size );
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