void
test_mifare_ultralight_cache (void)
{
int res;
MifareUltralightPage page;
res = mifare_ultralight_read (tag, 0, &page);
cut_assert_equal_int (0, res, cut_message ("mifare_ultralight_read() failed"));
/* Check cached pages consistency */
for (int i = 0; i <= 3; i++) {
cut_assert_equal_int (1, MIFARE_ULTRALIGHT(tag)->cached_pages[i], cut_message ("Wrong page cache value for tag->cached_pages[%d]", i));
}
for (int i = 4; i < MIFARE_ULTRALIGHT_PAGE_COUNT; i++) {
cut_assert_equal_int (0, MIFARE_ULTRALIGHT(tag)->cached_pages[i], cut_message ("Wrong page cache value for tag->cached_pages[%d]", i));
}
}
/*
* Read data to the provided MIFARE tag.
*/
int
mifare_ultralight_write (MifareTag tag, const MifareUltralightPageNumber page, const MifareUltralightPage data)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_ULTRALIGHT (tag);
ASSERT_VALID_PAGE (tag, page, true);
BUFFER_INIT (cmd, 6);
BUFFER_INIT (res, 1);
BUFFER_APPEND (cmd, 0xA2);
BUFFER_APPEND (cmd, page);
BUFFER_APPEND_BYTES (cmd, data, sizeof (MifareUltralightPage));
ULTRALIGHT_TRANSCEIVE (tag, cmd, res);
/* Invalidate page in cache */
MIFARE_ULTRALIGHT(tag)->cached_pages[page] = 0;
return 0;
}
/*
* Establish connection to the provided tag.
*/
int
mifare_ultralight_connect (MifareTag tag)
{
ASSERT_INACTIVE (tag);
ASSERT_MIFARE_ULTRALIGHT (tag);
nfc_target pnti;
nfc_modulation modulation = {
.nmt = NMT_ISO14443A,
.nbr = NBR_106
};
if (nfc_initiator_select_passive_target (tag->device, modulation, tag->info.abtUid, tag->info.szUidLen, &pnti) >= 0) {
tag->active = 1;
for (int i = 0; i < MIFARE_ULTRALIGHT_MAX_PAGE_COUNT; i++)
MIFARE_ULTRALIGHT(tag)->cached_pages[i] = 0;
} else {
errno = EIO;
return -1;
}
return 0;
}
/*
* Read data from the provided MIFARE tag.
*/
int
mifare_ultralight_read (MifareTag tag, MifareUltralightPageNumber page, MifareUltralightPage *data)
{
ASSERT_ACTIVE (tag);
ASSERT_MIFARE_ULTRALIGHT (tag);
ASSERT_VALID_PAGE (tag, page, false);
if (!MIFARE_ULTRALIGHT(tag)->cached_pages[page]) {
BUFFER_INIT (cmd, 2);
BUFFER_ALIAS (res, MIFARE_ULTRALIGHT(tag)->cache[page], sizeof(MifareUltralightPage) * 4);
BUFFER_APPEND (cmd, 0x30);
BUFFER_APPEND (cmd, page);
ULTRALIGHT_TRANSCEIVE (tag, cmd, res);
/* Handle wrapped pages */
int iPageCount;
if (IS_MIFARE_ULTRALIGHT_C(tag)) {
iPageCount = MIFARE_ULTRALIGHT_C_PAGE_COUNT_READ;
} else {
iPageCount = MIFARE_ULTRALIGHT_PAGE_COUNT;
}
for (int i = iPageCount; i <= page + 3; i++) {
memcpy (MIFARE_ULTRALIGHT(tag)->cache[i % iPageCount], MIFARE_ULTRALIGHT(tag)->cache[i], sizeof (MifareUltralightPage));
}
/* Mark pages as cached */
for (int i = page; i <= page + 3; i++) {
MIFARE_ULTRALIGHT(tag)->cached_pages[i % iPageCount] = 1;
}
}
memcpy (data, MIFARE_ULTRALIGHT(tag)->cache[page], sizeof (*data));
return 0;
}
