workbench/network/WirelessManager/src/wps/wps_nfc.c

   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
  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
  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
  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
 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 };