crewID/libfreefare
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Do not call directly nfc_initiator_select_passive_target() but rather nfc_initiator_list_passive_targets() in freefare_get_tags().

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This commit is contained in:
Romain Tartiere 2010-08-24 11:15:42 +00:00
parent e68ae59c5e
commit 53550cb5ed
1 changed files with 12 additions and 11 deletions
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23
libfreefare/freefare.c
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@ -24,6 +24,8 @@
#include "freefare_internal.h"
#define MAX_CANDIDATES 16
#define NXP_MANUFACTURER_CODE 0x04
struct supported_tag supported_tags[] = {
@ -59,9 +61,6 @@ freefare_get_tags (nfc_device_t *device)
// Drop the field for a while
nfc_configure(device,NDO_ACTIVATE_FIELD,false);
// Let the reader only try once to find a tag
nfc_configure(device,NDO_INFINITE_SELECT,false);
// Configure the CRC and Parity settings
nfc_configure(device,NDO_HANDLE_CRC,true);
nfc_configure(device,NDO_HANDLE_PARITY,true);
@ -70,22 +69,24 @@ freefare_get_tags (nfc_device_t *device)
nfc_configure(device,NDO_ACTIVATE_FIELD,true);
// Poll for a ISO14443A (MIFARE) tag
nfc_target_info_t target_info;
nfc_target_info_t candidates[MAX_CANDIDATES];
size_t candidates_count;
if (!nfc_initiator_list_passive_targets(device, NM_ISO14443A_106, candidates, MAX_CANDIDATES, &candidates_count))
return NULL;
tags = malloc(sizeof (void *));
if(!tags) return NULL;
tags[0] = NULL;
while (nfc_initiator_select_passive_target(device,NM_ISO14443A_106,NULL,0,&target_info)) {
for (size_t c = 0; c < candidates_count; c++) {
bool found = false;
struct supported_tag *tag_info;
for (size_t i = 0; i < sizeof (supported_tags) / sizeof (struct supported_tag); i++) {
if (((target_info.nai.szUidLen == 4) || (target_info.nai.abtUid[0] == NXP_MANUFACTURER_CODE)) &&
(target_info.nai.btSak == supported_tags[i].SAK) &&
(target_info.nai.szAtsLen == supported_tags[i].ATS_length) &&
(0 == memcmp (target_info.nai.abtAts, supported_tags[i].ATS, supported_tags[i].ATS_length))) {
if (((candidates[c].nai.szUidLen == 4) || (candidates[c].nai.abtUid[0] == NXP_MANUFACTURER_CODE)) &&
(candidates[c].nai.btSak == supported_tags[i].SAK) &&
(candidates[c].nai.szAtsLen == supported_tags[i].ATS_length) &&
(0 == memcmp (candidates[c].nai.abtAts, supported_tags[i].ATS, supported_tags[i].ATS_length))) {
tag_info = &(supported_tags[i]);
found = true;
@ -127,7 +128,7 @@ freefare_get_tags (nfc_device_t *device)
* (Target specific fields are initialized in mifare_*_tag_new())
*/
(tags[tag_count-1])->device = device;
(tags[tag_count-1])->info = target_info.nai;
(tags[tag_count-1])->info = candidates[c].nai;
(tags[tag_count-1])->active = 0;
(tags[tag_count-1])->tag_info = tag_info;
tags[tag_count] = NULL;