libnfc 1.8.0
nfc-scan-device.c
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1/*-
2 * Free/Libre Near Field Communication (NFC) library
3 *
4 * Libnfc historical contributors:
5 * Copyright (C) 2009 Roel Verdult
6 * Copyright (C) 2009-2013 Romuald Conty
7 * Copyright (C) 2010-2012 Romain Tartière
8 * Copyright (C) 2010-2013 Philippe Teuwen
9 * Copyright (C) 2012-2013 Ludovic Rousseau
10 * See AUTHORS file for a more comprehensive list of contributors.
11 * Additional contributors of this file:
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions are met:
15 * 1) Redistributions of source code must retain the above copyright notice,
16 * this list of conditions and the following disclaimer.
17 * 2 )Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 *
33 * Note that this license only applies on the examples, NFC library itself is under LGPL
34 *
35 */
36
42#ifdef HAVE_CONFIG_H
43# include "config.h"
44#endif // HAVE_CONFIG_H
45
46#include <err.h>
47#include <stdio.h>
48#include <stddef.h>
49#include <stdlib.h>
50#include <string.h>
51
52#include <nfc/nfc.h>
53
54#include "nfc-utils.h"
55
56#define MAX_DEVICE_COUNT 16
57#define MAX_TARGET_COUNT 16
58
59static nfc_device *pnd;
60
61static void
62print_usage(const char *argv[])
63{
64 printf("Usage: %s [OPTIONS]\n", argv[0]);
65 printf("Options:\n");
66 printf("\t-h\tPrint this help message.\n");
67 printf("\t-v\tSet verbose display.\n");
68 printf("\t-i\tAllow intrusive scan.\n");
69}
70
71int
72main(int argc, const char *argv[])
73{
74 const char *acLibnfcVersion;
75 size_t i;
76 bool verbose = false;
77
78 nfc_context *context;
79
80 // Get commandline options
81 for (int arg = 1; arg < argc; arg++) {
82 if (0 == strcmp(argv[arg], "-h")) {
83 print_usage(argv);
84 exit(EXIT_SUCCESS);
85 } else if (0 == strcmp(argv[arg], "-v")) {
86 verbose = true;
87 } else if (0 == strcmp(argv[arg], "-i")) {
88 // This has to be done before the call to nfc_init()
89 setenv("LIBNFC_INTRUSIVE_SCAN", "yes", 1);
90 } else {
91 ERR("%s is not supported option.", argv[arg]);
92 print_usage(argv);
93 exit(EXIT_FAILURE);
94 }
95 }
96
97 nfc_init(&context);
98 if (context == NULL) {
99 ERR("Unable to init libnfc (malloc)\n");
100 exit(EXIT_FAILURE);
101 }
102
103 // Display libnfc version
104 acLibnfcVersion = nfc_version();
105 printf("%s uses libnfc %s\n", argv[0], acLibnfcVersion);
106
107 nfc_connstring connstrings[MAX_DEVICE_COUNT];
108 size_t szDeviceFound = nfc_list_devices(context, connstrings, MAX_DEVICE_COUNT);
109
110 if (szDeviceFound == 0) {
111 printf("No NFC device found.\n");
112 nfc_exit(context);
113 exit(EXIT_FAILURE);
114 }
115
116 printf("%d NFC device(s) found:\n", (int)szDeviceFound);
117 char *strinfo = NULL;
118 for (i = 0; i < szDeviceFound; i++) {
119 pnd = nfc_open(context, connstrings[i]);
120 if (pnd != NULL) {
121 printf("- %s:\n %s\n", nfc_device_get_name(pnd), nfc_device_get_connstring(pnd));
122 if (verbose) {
123 if (nfc_device_get_information_about(pnd, &strinfo) >= 0) {
124 printf("%s", strinfo);
125 nfc_free(strinfo);
126 }
127 }
128 nfc_close(pnd);
129 } else {
130 printf("nfc_open failed for %s\n", connstrings[i]);
131 }
132 }
133 nfc_exit(context);
134 exit(EXIT_SUCCESS);
135}
const char * nfc_device_get_name(nfc_device *pnd)
Returns the device name.
Definition nfc.c:1209
const char * nfc_device_get_connstring(nfc_device *pnd)
Returns the device connection string.
Definition nfc.c:1221
void nfc_close(nfc_device *pnd)
Close from a NFC device.
Definition nfc.c:339
nfc_device * nfc_open(nfc_context *context, const nfc_connstring connstring)
Open a NFC device.
Definition nfc.c:277
size_t nfc_list_devices(nfc_context *context, nfc_connstring connstrings[], const size_t connstrings_len)
Scan for discoverable supported devices (ie. only available for some drivers)
Definition nfc.c:356
void nfc_exit(nfc_context *context)
Deinitialize libnfc. Should be called after closing all open devices and before your application term...
Definition nfc.c:248
void nfc_init(nfc_context **context)
Initialize libnfc. This function must be called before calling any other libnfc function.
Definition nfc.c:231
const char * nfc_version(void)
Returns the library version.
Definition nfc.c:1319
void nfc_free(void *p)
Free buffer allocated by libnfc.
Definition nfc.c:1334
int nfc_device_get_information_about(nfc_device *pnd, char **buf)
Print information about NFC device.
Definition nfc.c:1348
char nfc_connstring[NFC_BUFSIZE_CONNSTRING]
Definition nfc-types.h:63
Provide some examples shared functions like print, parity calculation, options parsing.
#define ERR(...)
Print a error message.
Definition nfc-utils.h:85
libnfc interface
NFC library context Struct which contains internal options, references, pointers, etc....
NFC device information.