Re: [PATCHv2 11/11] android/gatt: Add deregister_for_notification implementation

[Szymon Janc <szymon.janc@xxxxxxxxx>]

Hi Marcin,

On Thursday 27 March 2014 22:13:09 Marcin Kraglak wrote:
> This will unregister handlers for notification and indications
> and remove notification_data from client's list.
> ---
>  android/gatt.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 51 insertions(+), 1 deletion(-)
> 
> diff --git a/android/gatt.c b/android/gatt.c
> index d004e35..384dccf 100644
> --- a/android/gatt.c
> +++ b/android/gatt.c
> @@ -1573,11 +1573,61 @@ failed:
>  static void handle_client_deregister_for_notification(const void *buf,
>  								uint16_t len)
>  {
> +	const struct hal_cmd_gatt_client_deregister_for_notification *cmd = buf;
> +	struct notification_data *notification, notif;
> +	struct gatt_client *client;
> +	struct gatt_device *dev;
> +	int32_t conn_id = 0;
> +	char addr_str[18];
> +	uint8_t status;
> +	bdaddr_t addr;
> +
>  	DBG("");
> 
> +	client = queue_find(gatt_clients, match_client_by_id,
> +						INT_TO_PTR(cmd->client_if));
> +	if (!client) {
> +		error("gatt: couldn't deregister: client not registered");
> +		status = HAL_STATUS_FAILED;
> +		goto failed;
> +	}
> +
> +	android2bdaddr((bdaddr_t *)&cmd->bdaddr, &addr);

Casting is not needed here.

> +	ba2str(&addr, addr_str);
> +
> +	dev = queue_find(conn_list, match_dev_by_bdaddr, &addr);
> +	if (!dev) {
> +		error("gatt: couldn't deregister: device %s not found",
> +								addr_str);
> +		status = HAL_STATUS_FAILED;
> +		goto failed;
> +	}
> +
> +	conn_id = dev->conn_id;
> +	memcpy(&notif.ch, &cmd->char_id, sizeof(notif.ch));
> +	memcpy(&notif.service, &cmd->srvc_id, sizeof(notif.service));
> +	notif.dev = dev;
> +
> +	notification = queue_find(client->notifications,
> +						match_notification, &notif);
> +

Do we need to check that? Wouldn't g_attrib_unregister() failed if id is 
invalid?

And empty line is not needed here.

> +	if (!notification) {
> +		error("gatt: couldn't deregister: notification not registered");
> +		status = HAL_STATUS_FAILED;
> +		goto failed;
> +	}
> +
> +	unregister_notification(notification);
> +
> +	status = HAL_STATUS_SUCCESS;
> +
> +failed:
> +	client_register_for_notif_cb(conn_id, 0, status, &cmd->srvc_id,
> +								&cmd->char_id);
> +
>  	ipc_send_rsp(hal_ipc, HAL_SERVICE_ID_GATT,
>  				HAL_OP_GATT_CLIENT_DEREGISTER_FOR_NOTIFICATION,
> -				HAL_STATUS_FAILED);
> +				status);
>  }
> 
>  static void handle_client_read_remote_rssi(const void *buf, uint16_t len)

-- 
Szymon K. Janc
szymon.janc@xxxxxxxxx
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