static int cmd_gatt_unsubscribe(int argc, char *argv[])
{
int err;
if (!default_conn) {
printk("Not connected\n");
return 0;
}
if (!subscribe_params.value_handle) {
printk("No subscription found\n");
return 0;
}
err = bt_gatt_unsubscribe(default_conn, &subscribe_params);
if (err) {
printk("Unsubscribe failed (err %d)\n", err);
} else {
printk("Unsubscribe success\n");
}
/* Clear subscribe_params to reuse it */
memset(&subscribe_params, 0, sizeof(subscribe_params));
return 0;
}
void bt_gatt_notification(struct bt_conn *conn, uint16_t handle,
const void *data, uint16_t length)
{
struct bt_gatt_subscribe_params *params;
BT_DBG("handle 0x%04x length %u", handle, length);
for (params = subscriptions; params; params = params->_next) {
if (handle != params->value_handle) {
continue;
}
if (params->func(conn, 0, data, length) == BT_GATT_ITER_STOP) {
bt_gatt_unsubscribe(conn, params);
}
}
}
bool BLECharacteristicImp::unsubscribe(void)
{
int retval = 0;
bt_conn_t* conn = NULL;
if (true == BLEUtils::isLocalBLE(_ble_device))
{
// GATT server can't subscribe
return false;
}
if (false == _subscribed)
{
return true;
}
_sub_params.value = 0;
if (0 == (_gatt_chrc.properties & (BT_GATT_CHRC_NOTIFY | BT_GATT_CHRC_INDICATE)))
{
// The characteristic not support the Notify and Indicate
return false;
}
conn = bt_conn_lookup_addr_le(_ble_device.bt_le_address());
if (NULL == conn)
{
return false;
}
bt_addr_le_copy(&_sub_params._peer, bt_conn_get_dst(conn));
_sub_params.ccc_handle = _cccd_handle;
_sub_params.value_handle = _value_handle;
// Enable CCCD to allow peripheral send Notification/Indication
retval = bt_gatt_unsubscribe(conn, &_sub_params);
bt_conn_unref(conn);
if (0 == retval)
{
_subscribed = false;
}
return _subscribed;
}