
- Fix library finding ('nfc' instead of 'libnfc'); - Generate config.h from template on non-win32 platforms; - While here, include protection for config.h in several files.
286 lines
7.2 KiB
C
286 lines
7.2 KiB
C
/*-
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* Copyright (C) 2010, Romain Tartiere, Romuald Conty.
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#if defined(HAVE_CONFIG_H)
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include <freefare.h>
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#include "freefare_internal.h"
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#define MAX_CANDIDATES 16
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#define NXP_MANUFACTURER_CODE 0x04
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/*
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* Automagically allocate a FreefareTag given a device and target info.
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*/
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FreefareTag
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freefare_tag_new (nfc_device *device, nfc_target target)
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{
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FreefareTag tag = NULL;
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if (felica_taste (device, target)) {
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tag = felica_tag_new (device, target);
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} else if (mifare_mini_taste (device, target)) {
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tag = mifare_mini_tag_new (device, target);
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} else if (mifare_classic1k_taste (device, target)) {
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tag = mifare_classic1k_tag_new (device, target);
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} else if (mifare_classic4k_taste (device, target)) {
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tag = mifare_classic4k_tag_new (device, target);
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} else if (mifare_desfire_taste (device, target)) {
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tag = mifare_desfire_tag_new (device, target);
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} else if (mifare_ultralightc_taste (device, target)) {
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tag = mifare_ultralightc_tag_new (device, target);
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} else if (mifare_ultralight_taste (device, target)) {
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tag = mifare_ultralight_tag_new (device, target);
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}
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return tag;
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}
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/*
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* MIFARE card common functions
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*
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* The following functions send NFC commands to the initiator to prepare
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* communication with a MIFARE card, and perform required cleannups after using
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* the targets.
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*/
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/*
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* Get a list of the MIFARE targets near to the provided NFC initiator.
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*
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* The list has to be freed using the freefare_free_tags() function.
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*/
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FreefareTag *
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freefare_get_tags (nfc_device *device)
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{
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FreefareTag *tags = NULL;
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int tag_count = 0;
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nfc_initiator_init(device);
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// Drop the field for a while
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nfc_device_set_property_bool(device,NP_ACTIVATE_FIELD,false);
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// Configure the CRC and Parity settings
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nfc_device_set_property_bool(device,NP_HANDLE_CRC,true);
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nfc_device_set_property_bool(device,NP_HANDLE_PARITY,true);
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nfc_device_set_property_bool(device,NP_AUTO_ISO14443_4,true);
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// Enable field so more power consuming cards can power themselves up
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nfc_device_set_property_bool(device,NP_ACTIVATE_FIELD,true);
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// Poll for a ISO14443A (MIFARE) tag
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nfc_target candidates[MAX_CANDIDATES];
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int candidates_count;
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nfc_modulation modulation = {
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.nmt = NMT_ISO14443A,
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.nbr = NBR_106
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};
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if ((candidates_count = nfc_initiator_list_passive_targets(device, modulation, candidates, MAX_CANDIDATES)) < 0)
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return NULL;
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tags = malloc(sizeof (void *));
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if(!tags) return NULL;
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tags[0] = NULL;
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for (int c = 0; c < candidates_count; c++) {
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FreefareTag t;
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if ((t = freefare_tag_new(device, candidates[c]))) {
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/* (Re)Allocate memory for the found MIFARE targets array */
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FreefareTag *p = realloc (tags, (tag_count + 2) * sizeof (FreefareTag));
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if (p)
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tags = p;
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else
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return tags; // FAIL! Return what has been found so far.
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tags[tag_count++] = t;
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tags[tag_count] = NULL;
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}
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}
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// Poll for a FELICA tag
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modulation.nmt = NMT_FELICA;
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modulation.nbr = NBR_424; // FIXME NBR_212 should also be supported
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if ((candidates_count = nfc_initiator_list_passive_targets(device, modulation, candidates, MAX_CANDIDATES)) < 0)
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return NULL;
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for (int c = 0; c < candidates_count; c++) {
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FreefareTag t;
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if ((t = freefare_tag_new(device, candidates[c]))) {
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/* (Re)Allocate memory for the found FELICA targets array */
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FreefareTag *p = realloc (tags, (tag_count + 2) * sizeof (FreefareTag));
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if (p)
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tags = p;
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else
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return tags; // FAIL! Return what has been found so far.
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tags[tag_count++] = t;
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tags[tag_count] = NULL;
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}
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}
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return tags;
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}
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/*
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* Returns the type of the provided tag.
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*/
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enum freefare_tag_type
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freefare_get_tag_type (FreefareTag tag)
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{
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return tag->type;
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}
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/*
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* Returns the friendly name of the provided tag.
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*/
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const char *
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freefare_get_tag_friendly_name (FreefareTag tag)
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{
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switch (tag->type) {
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case FELICA:
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return "FeliCA";
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case MIFARE_MINI:
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return "Mifare Mini 0.3k";
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case MIFARE_CLASSIC_1K:
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return "Mifare Classic 1k";
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case MIFARE_CLASSIC_4K:
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return "Mifare Classic 4k";
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case MIFARE_DESFIRE:
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return "Mifare DESFire";
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case MIFARE_ULTRALIGHT_C:
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return "Mifare UltraLightC";
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case MIFARE_ULTRALIGHT:
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return "Mifare UltraLight";
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default:
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return "UNKNOWN";
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}
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}
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/*
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* Returns the UID of the provided tag.
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*/
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char *
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freefare_get_tag_uid (FreefareTag tag)
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{
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char *res = NULL;
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switch (tag->info.nm.nmt) {
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case NMT_FELICA:
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if ((res = malloc (17))) {
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for (size_t i = 0; i < 8; i++)
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snprintf (res + 2*i, 3, "%02x", tag->info.nti.nfi.abtId[i]);
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}
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break;
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case NMT_ISO14443A:
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if ((res = malloc (2 * tag->info.nti.nai.szUidLen + 1))) {
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for (size_t i = 0; i < tag->info.nti.nai.szUidLen; i++)
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snprintf (res + 2*i, 3, "%02x", tag->info.nti.nai.abtUid[i]);
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}
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break;
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case NMT_DEP:
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case NMT_ISO14443B2CT:
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case NMT_ISO14443B2SR:
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case NMT_ISO14443B:
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case NMT_ISO14443BI:
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case NMT_JEWEL:
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res = strdup ("UNKNOWN");
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}
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return res;
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}
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/*
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* Returns true if last selected tag is still present.
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*/
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bool freefare_selected_tag_is_present(nfc_device *device)
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{
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return (nfc_initiator_target_is_present(device, NULL) == NFC_SUCCESS);
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}
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/*
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* Free the provided tag.
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*/
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void
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freefare_free_tag (FreefareTag tag)
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{
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if (tag) {
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tag->free_tag (tag);
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}
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}
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const char *
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freefare_strerror (FreefareTag tag)
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{
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const char *p = "Unknown error";
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if (nfc_device_get_last_error (tag->device) < 0) {
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p = nfc_strerror (tag->device);
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} else {
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if (tag->type == MIFARE_DESFIRE) {
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if (MIFARE_DESFIRE (tag)->last_pcd_error) {
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p = mifare_desfire_error_lookup (MIFARE_DESFIRE (tag)->last_pcd_error);
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} else if (MIFARE_DESFIRE (tag)->last_picc_error) {
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p = mifare_desfire_error_lookup (MIFARE_DESFIRE (tag)->last_picc_error);
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}
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}
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}
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return p;
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}
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int
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freefare_strerror_r (FreefareTag tag, char *buffer, size_t len)
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{
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return (snprintf (buffer, len, "%s", freefare_strerror (tag)) < 0) ? -1 : 0;
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}
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void
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freefare_perror (FreefareTag tag, const char *string)
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{
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fprintf (stderr, "%s: %s\n", string, freefare_strerror (tag));
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}
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/*
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* Free the provided tag list.
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*/
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void
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freefare_free_tags (FreefareTag *tags)
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{
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if (tags) {
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for (int i=0; tags[i]; i++) {
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freefare_free_tag(tags[i]);
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}
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free (tags);
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}
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}
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/*
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* Low-level API
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*/
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void *
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memdup (const void *p, const size_t n)
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{
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void *res;
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if ((res = malloc (n))) {
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memcpy (res, p, n);
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}
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return res;
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}
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