uint32_t conn_mw_ble_gatts_service_changed(uint8_t const * const p_rx_buf,
uint32_t rx_buf_len,
uint8_t * const p_tx_buf,
uint32_t * const p_tx_buf_len)
{
SER_ASSERT_NOT_NULL(p_rx_buf);
SER_ASSERT_NOT_NULL(p_tx_buf);
SER_ASSERT_NOT_NULL(p_tx_buf_len);
uint16_t conn_handle;
uint16_t start_handle;
uint16_t end_handle;
uint32_t err_code = NRF_SUCCESS;
uint32_t sd_err_code;
err_code = ble_gatts_service_changed_req_dec(p_rx_buf, rx_buf_len, &conn_handle, &start_handle,
&end_handle);
SER_ASSERT(err_code == NRF_SUCCESS, err_code);
sd_err_code = sd_ble_gatts_service_changed(conn_handle, start_handle, end_handle);
err_code = ble_gatts_service_changed_rsp_enc(sd_err_code, p_tx_buf, p_tx_buf_len);
SER_ASSERT(err_code == NRF_SUCCESS, err_code);
return err_code;
}
/**@brief Function updating Service Changed CCCD and indicate a service change to peer.
*
* @details This function will verify the CCCD setting provided with \ref m_ble_peer_data and
* update the system attributes accordingly. If Service Change CCCD is set to indicate
* then a service change indication will be send to the peer.
*
* @retval NRF_INVALID_STATE if no connection has been established to a central.
* @return Any error code returned by SoftDevice function calls.
*/
static uint32_t service_change_indicate()
{
uint32_t err_code;
if (m_conn_handle == BLE_CONN_HANDLE_INVALID)
{
return NRF_ERROR_INVALID_STATE;
}
if (m_ble_peer_data_valid)
{
err_code = sd_ble_gatts_sys_attr_set(m_conn_handle,
m_ble_peer_data.sys_serv_attr,
sizeof(m_ble_peer_data.sys_serv_attr),
BLE_GATTS_SYS_ATTR_FLAG_SYS_SRVCS);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
err_code = sd_ble_gatts_sys_attr_set(m_conn_handle,
NULL,
0,
BLE_GATTS_SYS_ATTR_FLAG_USR_SRVCS);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
err_code = sd_ble_gatts_service_changed(m_conn_handle, DFU_SERVICE_HANDLE, BLE_HANDLE_MAX);
if ((err_code == BLE_ERROR_INVALID_CONN_HANDLE) ||
(err_code == NRF_ERROR_INVALID_STATE) ||
(err_code == BLE_ERROR_NO_TX_BUFFERS))
{
// Those errors can be expected when sending trying to send Service Changed Indication
// if the CCCD is not set to indicate. Thus set the returning error code to success.
err_code = NRF_SUCCESS;
}
}
else
{
err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
}
return err_code;
}
/**
* Callback when a BLE SYS_ATTR_MISSING.
*/
static void bleSysAttrMissingCallback(const GattSysAttrMissingCallbackParams *params)
{
int complete = 0;
deviceID = 255;
dm_handle_t dm_handle = {0,0,0,0};
int ret = dm_handle_get(params->connHandle, &dm_handle);
if (ret == 0)
deviceID = dm_handle.device_id;
if(manager->storage != NULL && deviceID < MICROBIT_BLE_MAXIMUM_BONDS)
{
ManagedString key("bleSysAttrs");
KeyValuePair* bleSysAttrs = manager->storage->get(key);
BLESysAttributeStore attribStore;
BLESysAttribute attrib;
if(bleSysAttrs != NULL)
{
//restore our sysAttrStore
memcpy(&attribStore, bleSysAttrs->value, sizeof(BLESysAttributeStore));
delete bleSysAttrs;
attrib = attribStore.sys_attrs[deviceID];
ret = sd_ble_gatts_sys_attr_set(params->connHandle, attrib.sys_attr, sizeof(attrib.sys_attr), BLE_GATTS_SYS_ATTR_FLAG_SYS_SRVCS);
complete = 1;
if(ret == 0)
ret = sd_ble_gatts_service_changed(params->connHandle, 0x000c, 0xffff);
}
}
if (!complete)
sd_ble_gatts_sys_attr_set(params->connHandle, NULL, 0, 0);
}
/**
* Callback when a BLE GATT connect occurs.
*/
static void bleConnectionCallback(const Gap::ConnectionCallbackParams_t *reason)
{
// configure the stack to hold on to CPU during critical timing events.
// mbed-classic performs __disabe_irq calls in its timers, which can cause MIC failures
// on secure BLE channels.
ble_common_opt_radio_cpu_mutex_t opt;
opt.enable = 1;
sd_ble_opt_set(BLE_COMMON_OPT_RADIO_CPU_MUTEX, (const ble_opt_t *)&opt);
// Ensure that there's no stale, cached information in the client... invalidate all characteristics.
uint16_t len = 8;
// Configure the ServiceChanged characteristic to receive service changed indications
// TODO: This is really a workaround as we can't maintain persistent state on the micro:bit across USB
// reprogramming flashes.... yet.
uint8_t data[] = {0x0B,0x00,0x02,0x00,0x02,0x00,0xB8,0x46};
sd_ble_gatts_sys_attr_set(reason->handle, data, len, BLE_GATTS_SYS_ATTR_FLAG_SYS_SRVCS);
sd_ble_gatts_service_changed(reason->handle, 0x000c, 0xffff);
}
/**@brief Function for loading application-specific context after establishing a secure connection.
*
* @details This function will load the application context and check if the ATT table is marked as
* changed. If the ATT table is marked as changed, a Service Changed Indication
* is sent to the peer if the Service Changed CCCD is set to indicate.
*
* @param[in] p_handle The Device Manager handle that identifies the connection for which the context
* should be loaded.
*/
static void app_context_load(dm_handle_t const * p_handle)
{
uint32_t err_code;
static uint32_t context_data;
dm_application_context_t context;
context.len = sizeof(context_data);
context.p_data = (uint8_t *)&context_data;
err_code = dm_application_context_get(p_handle, &context);
if (err_code == NRF_SUCCESS)
{
// Send Service Changed Indication if ATT table has changed.
if ((context_data & (DFU_APP_ATT_TABLE_CHANGED << DFU_APP_ATT_TABLE_POS)) != 0)
{
err_code = sd_ble_gatts_service_changed(m_conn_handle, APP_SERVICE_HANDLE_START, BLE_HANDLE_MAX);
if ((err_code != NRF_SUCCESS) &&
(err_code != BLE_ERROR_INVALID_CONN_HANDLE) &&
(err_code != NRF_ERROR_INVALID_STATE) &&
(err_code != BLE_ERROR_NO_TX_PACKETS) &&
(err_code != NRF_ERROR_BUSY) &&
(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING))
{
APP_ERROR_HANDLER(err_code);
}
}
err_code = dm_application_context_delete(p_handle);
APP_ERROR_CHECK(err_code);
}
else if (err_code == DM_NO_APP_CONTEXT)
{
// No context available. Ignore.
}
else
{
APP_ERROR_HANDLER(err_code);
}
}
