File content as of revision 132:5f44d6c28625:

/* mbed Microcontroller Library
 * Copyright (c) 2006-2013 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "common/common.h"
#include "nordic_common.h"

#include "btle.h"

#include "ble_stack_handler_types.h"
#include "ble_flash.h"
#include "ble_conn_params.h"

#include "btle_gap.h"
#include "btle_advertising.h"
#include "custom/custom_helper.h"

#include "softdevice_handler.h"
#include "pstorage.h"

#include "GapEvents.h"
#include "nRF51Gap.h"
#include "nRF51GattServer.h"
#include "device_manager.h"

#include "ble_hci.h"

extern "C" void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name);
void            app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t *p_file_name);

static void btle_handler(ble_evt_t *p_ble_evt);

ret_code_t dm_handler(dm_handle_t const *p_handle, dm_event_t const *p_event, ret_code_t event_result);

static void sys_evt_dispatch(uint32_t sys_evt)
{
    pstorage_sys_event_handler(sys_evt);
}

error_t btle_init(void)
{
#if defined(TARGET_DELTA_DFCM_NNN40) || defined(TARGET_HRM1017)
    SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_RC_250_PPM_4000MS_CALIBRATION, NULL);
#else
    SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, NULL);
#endif

    // Enable BLE stack
    /**
     * Using this call, the application can select whether to include the
     * Service Changed characteristic in the GATT Server. The default in all
     * previous releases has been to include the Service Changed characteristic,
     * but this affects how GATT clients behave. Specifically, it requires
     * clients to subscribe to this attribute and not to cache attribute handles
     * between connections unless the devices are bonded. If the application
     * does not need to change the structure of the GATT server attributes at
     * runtime this adds unnecessary complexity to the interaction with peer
     * clients. If the SoftDevice is enabled with the Service Changed
     * Characteristics turned off, then clients are allowed to cache attribute
     * handles making applications simpler on both sides.
     */
    static const bool IS_SRVC_CHANGED_CHARACT_PRESENT = true;
    ble_enable_params_t enableParams = {
        .gatts_enable_params = {
            .service_changed = IS_SRVC_CHANGED_CHARACT_PRESENT
        }
    };
    if (sd_ble_enable(&enableParams) != NRF_SUCCESS) {
        return ERROR_INVALID_PARAM;
    }

    ble_gap_addr_t addr;
    if (sd_ble_gap_address_get(&addr) != NRF_SUCCESS) {
        return ERROR_INVALID_PARAM;
    }
    if (sd_ble_gap_address_set(BLE_GAP_ADDR_CYCLE_MODE_NONE, &addr) != NRF_SUCCESS) {
        return ERROR_INVALID_PARAM;
    }

    ASSERT_STATUS( softdevice_ble_evt_handler_set(btle_handler));
    ASSERT_STATUS( softdevice_sys_evt_handler_set(sys_evt_dispatch));

    btle_gap_init();

    return ERROR_NONE;
}

ble_error_t
btle_initializeSecurity()
{
    if (pstorage_init() != NRF_SUCCESS) {
        return BLE_ERROR_UNSPECIFIED;
    }

    dm_init_param_t dm_init_param = {
        .clear_persistent_data = false /* Set to true in case the module should clear all persistent data. */
    };
    if (dm_init(&dm_init_param) != NRF_SUCCESS) {
        return BLE_ERROR_UNSPECIFIED;
    }

    uint8_t applicationInstance;
    const dm_application_param_t dm_param = {
        .evt_handler  = dm_handler,
        .service_type = DM_PROTOCOL_CNTXT_GATT_CLI_ID,
        .sec_param    = {
            .bond          = 1,            /**< Perform bonding. */
            .mitm          = 1,            /**< Man In The Middle protection required. */
            .io_caps       = BLE_GAP_IO_CAPS_NONE, /**< IO capabilities, see @ref BLE_GAP_IO_CAPS. */
            .oob           = 0,            /**< Out Of Band data available. */
            .min_key_size  = 16,           /**< Minimum encryption key size in octets between 7 and 16. If 0 then not applicable in this instance. */
            .max_key_size  = 16,           /**< Maximum encryption key size in octets between min_key_size and 16. */
            .kdist_periph  = {
              .enc  = 1,                     /**< Long Term Key and Master Identification. */
              .id   = 1,                     /**< Identity Resolving Key and Identity Address Information. */
              .sign = 1,                     /**< Connection Signature Resolving Key. */
            },                             /**< Key distribution bitmap: keys that the peripheral device will distribute. */
        }
    };

    ret_code_t rc;
    if ((rc = dm_register(&applicationInstance, &dm_param)) != NRF_SUCCESS) {
        switch (rc) {
            case NRF_ERROR_INVALID_STATE:
                return BLE_ERROR_INVALID_STATE;
            case NRF_ERROR_NO_MEM:
                return BLE_ERROR_NO_MEM;
            default:
                return BLE_ERROR_UNSPECIFIED;
        }
    }

    return BLE_ERROR_NONE;
}

ret_code_t
dm_handler(dm_handle_t const *p_handle, dm_event_t const *p_event, ret_code_t event_result)
{
    switch (p_event->event_id) {
        case DM_EVT_SECURITY_SETUP: /* started */
            nRF51Gap::getInstance().processSecuritySetupStartedEvent(p_event->event_param.p_gap_param->conn_handle);
            break;
        case DM_EVT_SECURITY_SETUP_COMPLETE:
            nRF51Gap::getInstance().processSecuritySetupCompletedEvent(p_event->event_param.p_gap_param->conn_handle);
            break;
        case DM_EVT_LINK_SECURED:
            nRF51Gap::getInstance().processLinkSecuredEvent(p_event->event_param.p_gap_param->conn_handle);
            break;
        case DM_EVT_DEVICE_CONTEXT_STORED:
            nRF51Gap::getInstance().processSecurityContextStoredEvent(p_event->event_param.p_gap_param->conn_handle);
            break;
        default:
            break;
    }

    return NRF_SUCCESS;
}

static void btle_handler(ble_evt_t *p_ble_evt)
{
    /* Library service handlers */
#if SDK_CONN_PARAMS_MODULE_ENABLE
    ble_conn_params_on_ble_evt(p_ble_evt);
#endif

    dm_ble_evt_handler(p_ble_evt);

    /* Custom event handler */
    switch (p_ble_evt->header.evt_id) {
        case BLE_GAP_EVT_CONNECTED: {
            Gap::Handle_t handle = p_ble_evt->evt.gap_evt.conn_handle;
            nRF51Gap::getInstance().setConnectionHandle(handle);
            const Gap::ConnectionParams_t *params = reinterpret_cast<Gap::ConnectionParams_t *>(&(p_ble_evt->evt.gap_evt.params.connected.conn_params));
            const ble_gap_addr_t *peer = &p_ble_evt->evt.gap_evt.params.connected.peer_addr;
            const ble_gap_addr_t *own  = &p_ble_evt->evt.gap_evt.params.connected.own_addr;
            nRF51Gap::getInstance().processConnectionEvent(handle,
                                                           static_cast<Gap::addr_type_t>(peer->addr_type), peer->addr,
                                                           static_cast<Gap::addr_type_t>(own->addr_type),  own->addr,
                                                           params);
            break;
        }

        case BLE_GAP_EVT_DISCONNECTED: {
            Gap::Handle_t handle = p_ble_evt->evt.gap_evt.conn_handle;
            // Since we are not in a connection and have not started advertising,
            // store bonds
            nRF51Gap::getInstance().setConnectionHandle (BLE_CONN_HANDLE_INVALID);

            Gap::DisconnectionReason_t reason;
            switch (p_ble_evt->evt.gap_evt.params.disconnected.reason) {
                case BLE_HCI_LOCAL_HOST_TERMINATED_CONNECTION:
                    reason = Gap::LOCAL_HOST_TERMINATED_CONNECTION;
                    break;
                case BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION:
                    reason = Gap::REMOTE_USER_TERMINATED_CONNECTION;
                    break;
                case BLE_HCI_CONN_INTERVAL_UNACCEPTABLE:
                    reason = Gap::CONN_INTERVAL_UNACCEPTABLE;
                    break;
                default:
                    /* Please refer to the underlying transport library for an
                     * interpretion of this reason's value. */
                    reason = static_cast<Gap::DisconnectionReason_t>(p_ble_evt->evt.gap_evt.params.disconnected.reason);
                    break;
            }
            nRF51Gap::getInstance().processDisconnectionEvent(handle, reason);
            break;
        }

        case BLE_GAP_EVT_SEC_PARAMS_REQUEST: {
            ble_gap_sec_params_t sec_params = {0};

            sec_params.bond          = 1;  /**< Perform bonding. */
            sec_params.mitm          = CFG_BLE_SEC_PARAM_MITM;
            sec_params.io_caps       = CFG_BLE_SEC_PARAM_IO_CAPABILITIES;
            sec_params.oob           = CFG_BLE_SEC_PARAM_OOB;
            sec_params.min_key_size  = CFG_BLE_SEC_PARAM_MIN_KEY_SIZE;
            sec_params.max_key_size  = CFG_BLE_SEC_PARAM_MAX_KEY_SIZE;

            ble_gap_sec_keyset_t sec_keyset = {0};

            ASSERT_STATUS_RET_VOID(sd_ble_gap_sec_params_reply(nRF51Gap::getInstance().getConnectionHandle(), BLE_GAP_SEC_STATUS_SUCCESS, &sec_params, &sec_keyset));
        }
        break;

        case BLE_GAP_EVT_TIMEOUT:
            if (p_ble_evt->evt.gap_evt.params.timeout.src == BLE_GAP_TIMEOUT_SRC_ADVERTISING) {
                nRF51Gap::getInstance().processEvent(GapEvents::GAP_EVENT_TIMEOUT);
            }
            break;

        case BLE_GATTC_EVT_TIMEOUT:
        case BLE_GATTS_EVT_TIMEOUT:
            // Disconnect on GATT Server and Client timeout events.
            // ASSERT_STATUS_RET_VOID (sd_ble_gap_disconnect(m_conn_handle,
            // BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION));
            break;

        default:
            break;
    }

    nRF51GattServer::getInstance().hwCallback(p_ble_evt);
}

/**************************************************************************/
/*!
    @brief      Callback when an error occurs inside the SoftDevice

    @param[in]  line_num
    @param[in]  p-file_name

    @returns
*/
/**************************************************************************/
void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name)
{
    ASSERT(false, (void) 0);
}

/**************************************************************************/
/*!
    @brief      Handler for general errors above the SoftDevice layer.
                Typically we can' recover from this so we do a reset.

    @param[in]  error_code
    @param[in]  line_num
    @param[in]  p-file_name

    @returns
*/
/**************************************************************************/
void app_error_handler(uint32_t       error_code,
                       uint32_t       line_num,
                       const uint8_t *p_file_name)
{
    ASSERT_STATUS_RET_VOID( error_code );
    NVIC_SystemReset();
}