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nfc_initiator_select_passive_target() accepts NULL pbtInitData and provides default values

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This commit is contained in:
Philippe Teuwen 2014-02-10 01:07:11 +01:00
parent fd30e63b80
commit 415ad7cbac
2 changed files with 20 additions and 21 deletions
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1
ChangeLog
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@ -22,6 +22,7 @@ Improvements:
- Save & restore NP_INFINITE_SELECT status when changing it internally
- nfc-mfclassic: add format/wipe command (thanks to Adam Laurie)
- nfc-jewel: new utility to read/write Topaz/Jewel tags (thanks to Pim 't Hart)
- nfc_initiator_select_passive_target() provides defaults if pbtInitData=NULL
Fixes & improvements specific to nfc_initiator_target_is_present():
- Supports fully PN532 & PN533, not tested on other chips

34
libnfc/nfc.c
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@ -500,12 +500,15 @@ nfc_initiator_init_secure_element(nfc_device *pnd)
*
* @param pnd \a nfc_device struct pointer that represent currently used device
* @param nm desired modulation
* @param pbtInitData optional initiator data used for Felica, ISO14443B, Topaz polling or to select a specific UID in ISO14443A.
* @param pbtInitData optional initiator data, NULL for using the default values.
* @param szInitData length of initiator data \a pbtInitData.
* @note pbtInitData is used with different kind of data depending on modulation type:
* - for an ISO/IEC 14443 type A modulation, pbbInitData contains the UID you want to select;
* - for an ISO/IEC 14443 type B modulation, pbbInitData contains Application Family Identifier (AFI) (see ISO/IEC 14443-3);
* - for a FeliCa modulation, pbbInitData contains polling payload (see ISO/IEC 18092 11.2.2.5).
* - for an ISO/IEC 14443 type B modulation, pbbInitData contains Application Family Identifier (AFI) (see ISO/IEC 14443-3)
and optionally a second byte = 0x01 if you want to use probabilistic approach instead of timeslot approach;
* - for a FeliCa modulation, pbbInitData contains a 5-byte polling payload (see ISO/IEC 18092 11.2.2.5).
* - for ISO14443B', ASK CTx and ST SRx, see corresponding standards
* - if NULL, default values adequate for the chosen modulation will be used.
*
* @param[out] pnt \a nfc_target struct pointer which will filled if available
*
@ -520,24 +523,19 @@ nfc_initiator_select_passive_target(nfc_device *pnd,
const uint8_t *pbtInitData, const size_t szInitData,
nfc_target *pnt)
{
uint8_t abtInit[MAX(12, szInitData)];
size_t szInit;
switch (nm.nmt) {
case NMT_ISO14443A:
uint8_t *abtInit = NULL;
uint8_t abtTmpInit[MAX(12, szInitData)];
size_t szInit = 0;
if (szInitData == 0) {
// Provide default values, if any
prepare_initiator_data(nm, &abtInit, &szInit);
} else if (nm.nmt == NMT_ISO14443A) {
abtInit = abtTmpInit;
iso14443_cascade_uid(pbtInitData, szInitData, abtInit, &szInit);
break;
case NMT_JEWEL:
case NMT_ISO14443B:
case NMT_ISO14443BI:
case NMT_ISO14443B2SR:
case NMT_ISO14443B2CT:
case NMT_FELICA:
case NMT_DEP:
} else {
abtInit = abtTmpInit;
memcpy(abtInit, pbtInitData, szInitData);
szInit = szInitData;
break;
}
HAL(initiator_select_passive_target, pnd, nm, abtInit, szInit, pnt);