/**@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);
}
}
void app_bond_init(app_bond_table_t * p_bond_table)
{
uint32_t err_code;
dm_application_context_t app_context;
dm_handle_t dm_handle = {.appl_id = 0};
static uint32_t context_data;
app_context.len = sizeof(context_data);
app_context.p_data = (uint8_t *)&context_data;
for(uint8_t device_id = 0; device_id < DEVICE_MANAGER_MAX_BONDS; device_id++)
{
dm_handle.device_id = device_id;
err_code = dm_application_context_get(&dm_handle,&app_context);
if(err_code == NRF_SUCCESS)
{
p_bond_table->app_bond_cnt[device_id] =*((uint32_t *)app_context.p_data);
p_bond_table->device_id[device_id] = device_id;
}
else if(err_code == (NRF_ERROR_INVALID_ADDR | DEVICE_MANAGER_ERR_BASE))
{
//No context available.
p_bond_table->app_bond_cnt[device_id] = NO_APP_CONTEXT;
p_bond_table->device_id[device_id] = device_id;
}
else if(err_code == DM_NO_APP_CONTEXT)
{
//set context as invalid
p_bond_table->app_bond_cnt[device_id] = INVALID_APP_CONTEXT;
p_bond_table->device_id[device_id] = device_id;
}
else
{
APP_ERROR_CHECK(err_code);
}
}
}
void app_bond_find(app_bond_table_t * p_bond_table,table_index_t * p_index)
{
p_index->mr_cnt_val = 0;
p_index->lr_cnt_val = NO_APP_CONTEXT;
for(uint8_t i = 0; i < DEVICE_MANAGER_MAX_BONDS; i++)
{
//Find most recently stored bond
if((p_index->mr_cnt_val < p_bond_table->app_bond_cnt[i]) &&
(p_bond_table->app_bond_cnt[i] != NO_APP_CONTEXT) &&
(p_bond_table->app_bond_cnt[i] != INVALID_APP_CONTEXT))
{
p_index->mr_cnt_val = p_bond_table->app_bond_cnt[i];
p_index->mr_index = i;
}
// Find least recently stored bond
if((p_index->lr_cnt_val > p_bond_table->app_bond_cnt[i]) &&
(p_bond_table->app_bond_cnt[i] != NO_APP_CONTEXT) &&
(p_bond_table->app_bond_cnt[i] != INVALID_APP_CONTEXT))
{
p_index->lr_cnt_val = p_bond_table->app_bond_cnt[i];
p_index->lr_index = i;
}
// Update bond context in case it is not valid for a particular device
if( p_bond_table->app_bond_cnt[i] == INVALID_APP_CONTEXT)
{
uint32_t err_code;
dm_handle_t dm_handle;
dm_application_context_t app_context;
p_bond_table->app_bond_cnt[i] = p_bond_table->app_bond_cnt[p_index->mr_index] + 1;
p_index->mr_cnt_val = p_bond_table->app_bond_cnt[i];
p_index->mr_index = i;
dm_handle.device_id = i;
dm_handle.appl_id = 0;
dm_handle.connection_id = 0;
app_context.p_data = (uint8_t *)&p_bond_table->app_bond_cnt[i];
app_context.len = sizeof(p_bond_table->app_bond_cnt[0]);
err_code = dm_application_context_set(&dm_handle,&app_context);
APP_ERROR_CHECK(err_code);
}
}
}
