crewID/libnfc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

nfc-anticol: fix bug in long UID display, and some more details

Browse source
This commit is contained in:
Philippe Teuwen 2010-10-20 15:23:09 +00:00
parent 72d7b66d2b
commit 0abdf67b8b
1 changed files with 19 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
examples/nfc-anticol.c
View file

@ -46,6 +46,8 @@ static byte_t abtRx[MAX_FRAME_LEN];
static size_t szRxBits; static size_t szRxBits;
static size_t szRx; static size_t szRx;
static byte_t abtUid[10]; static byte_t abtUid[10];
static byte_t abtAtqa[2];
static byte_t abtSak;
static size_t szUidLen = 4; static size_t szUidLen = 4;
static nfc_device_t *pnd; static nfc_device_t *pnd;
@ -63,7 +65,7 @@ transmit_bits (const byte_t * pbtTx, const size_t szTxBits)
{ {
// Show transmitted command // Show transmitted command
if (!quiet_output) { if (!quiet_output) {
printf ("Sent bits: "); printf ("Sent bits: ");
print_hex_bits (pbtTx, szTxBits); print_hex_bits (pbtTx, szTxBits);
} }
// Transmit the bit frame command, we don't use the arbitrary parity feature // Transmit the bit frame command, we don't use the arbitrary parity feature
@ -85,7 +87,7 @@ transmit_bytes (const byte_t * pbtTx, const size_t szTx)
{ {
// Show transmitted command // Show transmitted command
if (!quiet_output) { if (!quiet_output) {
printf ("Sent bits: "); printf ("Sent bits: ");
print_hex (pbtTx, szTx); print_hex (pbtTx, szTx);
} }
// Transmit the command bytes // Transmit the command bytes
@ -187,19 +189,23 @@ main (int argc, char *argv[])
nfc_disconnect (pnd); nfc_disconnect (pnd);
return 1; return 1;
} }
memcpy (abtAtqa, abtRx, 2);
// Anti-collision // Anti-collision
transmit_bytes (abtSelectAll, 2); transmit_bytes (abtSelectAll, 2);
// Save the UID
memcpy (abtUid, abtRx, 4);
memcpy (abtSelectTag + 2, abtRx, 5); memcpy (abtSelectTag + 2, abtRx, 5);
append_iso14443a_crc (abtSelectTag, 7); append_iso14443a_crc (abtSelectTag, 7);
transmit_bytes (abtSelectTag, 9);
// Test if we are dealing with a 4 bytes uid // Test if we are dealing with a 4 bytes uid
if (abtUid[0] != 0x88) { if (abtRx[0] != 0x88) {
// Save the UID
memcpy (abtUid, abtRx, 4);
szUidLen = 4; szUidLen = 4;
} else { } else {
// Save the first 3 bytes of UID
memcpy (abtUid, abtRx+1, 3);
transmit_bytes (abtSelectTag, 9);
// We have to do the anti-collision for cascade level 2 // We have to do the anti-collision for cascade level 2
abtSelectAll[0] = 0x95; abtSelectAll[0] = 0x95;
abtSelectTag[0] = 0x95; abtSelectTag[0] = 0x95;
@ -207,13 +213,14 @@ main (int argc, char *argv[])
// Anti-collision // Anti-collision
transmit_bytes (abtSelectAll, 2); transmit_bytes (abtSelectAll, 2);
// Save the UID // Save the second part of UID
memcpy (abtUid + 4, abtRx, 4); memcpy (abtUid + 3, abtRx, 4);
memcpy (abtSelectTag + 2, abtRx, 5); memcpy (abtSelectTag + 2, abtRx, 5);
append_iso14443a_crc (abtSelectTag, 7); append_iso14443a_crc (abtSelectTag, 7);
transmit_bytes (abtSelectTag, 9);
szUidLen = 7; szUidLen = 7;
} }
transmit_bytes (abtSelectTag, 9);
abtSak = abtRx[0];
// Request ATS, this only applies to tags that support ISO 14443A-4 // Request ATS, this only applies to tags that support ISO 14443A-4
if (abtRx[0] & SAK_FLAG_ATS_SUPPORTED) if (abtRx[0] & SAK_FLAG_ATS_SUPPORTED)
@ -223,10 +230,11 @@ main (int argc, char *argv[])
transmit_bytes (abtHalt, 4); transmit_bytes (abtHalt, 4);
printf ("\nFound tag with UID: "); printf ("\nFound tag with UID: ");
printf ("%02x%02x%02x%02x", abtUid[0], abtUid[1], abtUid[2], abtUid[3]);
if (szUidLen == 7) { if (szUidLen == 7) {
printf ("%02x%02x%02x", abtUid[6], abtUid[5], abtUid[4]); printf ("%02x%02x%02x", abtUid[4], abtUid[5], abtUid[6]);
} }
printf ("%02x%02x%02x%02x\n", abtUid[3], abtUid[2], abtUid[1], abtUid[0]); printf(" ATQA: %02x%02x SAK: %02x\n", abtAtqa[1], abtAtqa[0], abtSak);
nfc_disconnect (pnd); nfc_disconnect (pnd);
return 0; return 0;