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Refactoring Blocks vs. Sectors.

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- mifare_classic_format_sector() now wants a sector instead of a block (the name was really disturbing);
  - New public API functions for Block <=> Sector conversions.
This commit is contained in:
Romain Tartiere 2010-07-01 23:19:45 +00:00
parent cc5de33a56
commit 163ce56cc0
9 changed files with 62 additions and 48 deletions
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54
libfreefare/mifare_classic.c
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@ -521,7 +521,7 @@ get_block_access_bits (MifareTag tag, const MifareClassicBlockNumber block, Mifa
uint16_t sector_access_bits, sector_access_bits_;
MifareClassicBlockNumber trailer = mifare_classic_last_sector_block (block);
MifareClassicBlockNumber trailer = mifare_classic_sector_last_block (mifare_classic_block_sector (block));
/*
* The trailer block contains access bits for the whole sector in a 3 bytes
@ -632,10 +632,10 @@ mifare_classic_get_data_block_permission (MifareTag tag, const MifareClassicBloc
* Reset a MIFARE target sector to factory default.
*/
int
mifare_classic_format_sector (MifareTag tag, const MifareClassicBlockNumber block)
mifare_classic_format_sector (MifareTag tag, const MifareSectorNumber sector)
{
MifareClassicBlockNumber first_sector_block = mifare_classic_first_sector_block (block);
MifareClassicBlockNumber last_sector_block = mifare_classic_last_sector_block (block);
MifareClassicBlockNumber first_sector_block = mifare_classic_sector_first_block (sector);
MifareClassicBlockNumber last_sector_block = mifare_classic_sector_last_block (sector);
/*
* Check that the current key allow us to rewrite data and trailer blocks.
@ -679,39 +679,51 @@ mifare_classic_format_sector (MifareTag tag, const MifareClassicBlockNumber bloc
return 0;
}
/*
* Get the sector's first block number in the provided block's sector.
*/
MifareClassicBlockNumber
mifare_classic_first_sector_block (MifareClassicBlockNumber block)
MifareSectorNumber
mifare_classic_block_sector (MifareClassicBlockNumber block)
{
int res;
if (block < 128) {
res = (block / 4) * 4;
} else {
res = ((block - 128) / 16) * 16 + 128;
}
MifareSectorNumber res;
if (block < 32 * 4)
res = block / 4;
else
res = 32 + ( (block - (32 * 4)) / 16 );
return res;
}
/*
* Get the sector's last block number (aka trailer block) in the provided
* block's sector.
* Get the sector's first block number
*/
MifareClassicBlockNumber
mifare_classic_last_sector_block (MifareClassicBlockNumber block)
mifare_classic_sector_first_block (MifareSectorNumber sector)
{
int res;
if (block < 128) {
res = (block / 4) * 4 + 3;
if (sector < 32) {
res = sector * 4;
} else {
res = ((block - 128) / 16) * 16 + 15 + 128;
res = 32 * 4 + (sector - 32) * 16;
}
return res;
}
size_t
mifare_classic_sector_block_count (MifareSectorNumber sector)
{
return (sector < 32) ? 4 : 16 ;
}
/*
* Get the sector's last block number (aka trailer block)
*/
MifareClassicBlockNumber
mifare_classic_sector_last_block (MifareSectorNumber sector)
{
return mifare_classic_sector_first_block (sector) +
mifare_classic_sector_block_count (sector) - 1;
}
/*
* Generates a MIFARE trailer block.
*/