1 /*
2 * NFC routines for Wi-Fi Protected Setup
3 * Copyright (c) 2009, Masashi Honma <honma@ictec.co.jp>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15 #include "includes.h"
16 #include "common.h"
17
18 #include "wps/wps.h"
19 #include "wps_i.h"
20
21
22 struct wps_nfc_data {
23 struct oob_nfc_device_data *oob_nfc_dev;
24 };
25
26
init_nfc(struct wps_context * wps,struct oob_device_data * oob_dev,int registrar)27 static void * init_nfc(struct wps_context *wps,
28 struct oob_device_data *oob_dev, int registrar)
29 {
30 struct oob_nfc_device_data *oob_nfc_dev;
31 struct wps_nfc_data *data;
32
33 oob_nfc_dev = wps_get_oob_nfc_device(oob_dev->device_name);
34 if (oob_nfc_dev == NULL) {
35 wpa_printf(MSG_ERROR, "WPS (NFC): Unknown NFC device (%s)",
36 oob_dev->device_name);
37 return NULL;
38 }
39
40 if (oob_nfc_dev->init_func(oob_dev->device_path) < 0)
41 return NULL;
42
43 data = os_zalloc(sizeof(*data));
44 if (data == NULL) {
45 wpa_printf(MSG_ERROR, "WPS (NFC): Failed to allocate "
46 "nfc data area");
47 return NULL;
48 }
49 data->oob_nfc_dev = oob_nfc_dev;
50 return data;
51 }
52
53
read_nfc(void * priv)54 static struct wpabuf * read_nfc(void *priv)
55 {
56 struct wps_nfc_data *data = priv;
57 struct wpabuf *wifi, *buf;
58 char *raw_data;
59 size_t len;
60
61 raw_data = data->oob_nfc_dev->read_func(&len);
62 if (raw_data == NULL)
63 return NULL;
64
65 wifi = wpabuf_alloc_copy(raw_data, len);
66 os_free(raw_data);
67 if (wifi == NULL) {
68 wpa_printf(MSG_ERROR, "WPS (NFC): Failed to allocate "
69 "nfc read area");
70 return NULL;
71 }
72
73 buf = ndef_parse_wifi(wifi);
74 wpabuf_free(wifi);
75 if (buf == NULL)
76 wpa_printf(MSG_ERROR, "WPS (NFC): Failed to unwrap");
77 return buf;
78 }
79
80
write_nfc(void * priv,struct wpabuf * buf)81 static int write_nfc(void *priv, struct wpabuf *buf)
82 {
83 struct wps_nfc_data *data = priv;
84 struct wpabuf *wifi;
85 int ret;
86
87 wifi = ndef_build_wifi(buf);
88 if (wifi == NULL) {
89 wpa_printf(MSG_ERROR, "WPS (NFC): Failed to wrap");
90 return -1;
91 }
92
93 ret = data->oob_nfc_dev->write_func(wpabuf_mhead(wifi),
94 wpabuf_len(wifi));
95 wpabuf_free(wifi);
96 return ret;
97 }
98
99
deinit_nfc(void * priv)100 static void deinit_nfc(void *priv)
101 {
102 struct wps_nfc_data *data = priv;
103
104 data->oob_nfc_dev->deinit_func();
105
106 os_free(data);
107 }
108
109
110 struct oob_device_data oob_nfc_device_data = {
111 .device_name = NULL,
112 .device_path = NULL,
113 .init_func = init_nfc,
114 .read_func = read_nfc,
115 .write_func = write_nfc,
116 .deinit_func = deinit_nfc,
117 };
118