/* Copyright (c) 2017, Nordic Semiconductor ASA
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 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright notice, this
 *      list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright notice,
 *      this list of conditions and the following disclaimer in the documentation
 *      and/or other materials provided with the distribution.
 *
 *   3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *      contributors may be used to endorse or promote products derived from
 *      this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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 */

/**
 * @file
 *   This file implements storage of PIB attributes in nRF 802.15.4 radio driver.
 *
 */

#include "nrf_drv_radio802154_pib.h"

#include <stdbool.h>
#include <stdint.h>
#include <string.h>

#include "nrf_drv_radio802154_const.h"

#define BROADCAST_ADDRESS    ((uint8_t [SHORT_ADDRESS_SIZE]) {0xff, 0xff}) ///< Broadcast Short Address

typedef struct
{
    int8_t  tx_power;                                 ///< Transmit power.
    uint8_t pan_id[PAN_ID_SIZE];                      ///< Pan Id of this node.
    uint8_t short_addr[SHORT_ADDRESS_SIZE];           ///< Short Address of this node.
    uint8_t extended_addr[EXTENDED_ADDRESS_SIZE];     ///< Extended Address of this node.
    bool    promiscuous                          :1;  ///< Indicating if radio is in promiscuous mode.
    bool    auto_ack                             :1;  ///< Indicating if auto ACK procedure is enabled.
    uint8_t channel                              :5;  ///< Channel on which the node receives messages.
} nrf_drv_radio802154_pib_data_t;

static nrf_drv_radio802154_pib_data_t m_data;  ///< Buffer containing PIB data.

void nrf_drv_radio802154_pib_init(void)
{
    m_data.promiscuous = false;
    m_data.auto_ack    = true;
    m_data.channel     = 11;

    memset(m_data.pan_id, 0xff, sizeof(m_data.pan_id));
    m_data.short_addr[0] = 0xfe;
    m_data.short_addr[1] = 0xff;
    memset(m_data.extended_addr, 0, sizeof(m_data.extended_addr));
}

bool nrf_drv_radio802154_pib_promiscuous_get(void)
{
    return m_data.promiscuous;
}

void nrf_drv_radio802154_pib_promiscuous_set(bool enabled)
{
    m_data.promiscuous = enabled;
}

bool nrf_drv_radio802154_pib_auto_ack_get(void)
{
    return m_data.auto_ack;
}

void nrf_drv_radio802154_pib_auto_ack_set(bool enabled)
{
    m_data.auto_ack = enabled;
}

uint8_t nrf_drv_radio802154_pib_channel_get(void)
{
    return m_data.channel;
}

void nrf_drv_radio802154_pib_channel_set(uint8_t channel)
{
    m_data.channel = channel;
}

int8_t nrf_drv_radio802154_pib_tx_power_get(void)
{
    return m_data.tx_power;
}

void nrf_drv_radio802154_pib_tx_power_set(int8_t dbm)
{
    m_data.tx_power = dbm;
}

void nrf_drv_radio802154_pib_pan_id_set(const uint8_t * p_pan_id)
{
    memcpy(m_data.pan_id, p_pan_id, PAN_ID_SIZE);
}

void nrf_drv_radio802154_pib_extended_address_set(const uint8_t * p_extended_address)
{
    memcpy(m_data.extended_addr, p_extended_address, EXTENDED_ADDRESS_SIZE);
}

void nrf_drv_radio802154_pib_short_address_set(const uint8_t * p_short_address)
{
    memcpy(m_data.short_addr, p_short_address, SHORT_ADDRESS_SIZE);
}

bool nrf_drv_radio802154_pib_dest_addr_matches(const uint8_t * p_psdu)
{
    // Check destination PAN Id.
    // Note that +1 in PSDU offset is added because first byte in PSDU is length.
    if ((0 != memcmp(&p_psdu[PAN_ID_OFFSET + 1], m_data.pan_id, PAN_ID_SIZE)) &&
        (0 != memcmp(&p_psdu[PAN_ID_OFFSET + 1], BROADCAST_ADDRESS, PAN_ID_SIZE)))
    {
        return false;
    }

    // Check destination address.
    switch (p_psdu[DEST_ADDR_TYPE_OFFSET] & DEST_ADDR_TYPE_MASK)
    {
        case DEST_ADDR_TYPE_SHORT:
        {
            // Note that +1 in PSDU offset is added because first byte in PSDU is length.
            if ((0 != memcmp(&p_psdu[DEST_ADDR_OFFSET + 1],
                             m_data.short_addr,
                             SHORT_ADDRESS_SIZE)) &&
                (0 != memcmp(&p_psdu[DEST_ADDR_OFFSET + 1],
                             BROADCAST_ADDRESS,
                             SHORT_ADDRESS_SIZE)))
            {
                return false;
            }

            break;
        }

        case DEST_ADDR_TYPE_EXTENDED:
        {
            // Note that +1 in PSDU offset is added because first byte in PSDU is length.
            if (0 != memcmp(&p_psdu[DEST_ADDR_OFFSET + 1],
                            m_data.extended_addr,
                            sizeof(m_data.extended_addr)))
            {
                return false;
            }

            break;
        }

        default:
            return false;
    }

    return true;
}