wps_nfc_pn531.c

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/*
 * NFC PN531 routines for Wi-Fi Protected Setup
 * Copyright (c) 2009, Masashi Honma <honma@ictec.co.jp>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#include "includes.h"
#include "common.h"

#include "wps/wps.h"
#include "wps_i.h"

#include "WpsNfcType.h"
#include "WpsNfc.h"


static int init_nfc_pn531(char *path)
{
        u32 ret;

        ret = WpsNfcInit();
        if (ret != WPS_NFCLIB_ERR_SUCCESS) {
                wpa_printf(MSG_ERROR, "WPS (PN531): Failed to initialize "
                           "NFC Library: 0x%08x", ret);
                return -1;
        }

        ret = WpsNfcOpenDevice((int8 *) path);
        if (ret != WPS_NFCLIB_ERR_SUCCESS) {
                wpa_printf(MSG_ERROR, "WPS (PN531): Failed to open "
                           "NFC Device(%s): 0x%08x", path, ret);
                goto fail;
        }

        ret = WpsNfcTokenDiscovery();
        if (ret != WPS_NFCLIB_ERR_SUCCESS) {
                wpa_printf(MSG_ERROR, "WPS (PN531): Failed to discover "
                           "token: 0x%08x", ret);
                WpsNfcCloseDevice();
                goto fail;
        }

        return 0;

fail:
        WpsNfcDeinit();
        return -1;
}


static void * read_nfc_pn531(size_t *size)
{
        uint32 len;
        u32 ret;
        int8 *data;

        ret = WpsNfcRawReadToken(&data, &len);
        if (ret != WPS_NFCLIB_ERR_SUCCESS) {
                wpa_printf(MSG_ERROR, "WPS (PN531): Failed to read: 0x%08x",
                           ret);
                return NULL;
        }

        *size = len;
        return data;
}


static int write_nfc_pn531(void *data, size_t len)
{
        u32 ret;

        ret = WpsNfcRawWriteToken(data, len);
        if (ret != WPS_NFCLIB_ERR_SUCCESS) {
                wpa_printf(MSG_ERROR, "WPS (PN531): Failed to write: 0x%08x",
                           ret);
                return -1;
        }

        return 0;
}


static void deinit_nfc_pn531(void)
{
        u32 ret;

        ret = WpsNfcCloseDevice();
        if (ret != WPS_NFCLIB_ERR_SUCCESS)
                wpa_printf(MSG_ERROR, "WPS (PN531): Failed to close "
                           "NFC Device: 0x%08x", ret);

        ret = WpsNfcDeinit();
        if (ret != WPS_NFCLIB_ERR_SUCCESS)
                wpa_printf(MSG_ERROR, "WPS (PN531): Failed to deinitialize "
                           "NFC Library: 0x%08x", ret);
}


struct oob_nfc_device_data oob_nfc_pn531_device_data = {
        .init_func      = init_nfc_pn531,
        .read_func      = read_nfc_pn531,
        .write_func     = write_nfc_pn531,
        .deinit_func    = deinit_nfc_pn531,
};