Re: [PATCH BlueZ 3/5] AVRCP: Add browsing channel support

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Hi Vani,

On Tue, Jul 10, 2012 at 12:36 PM, Vani-dineshbhai PATEL
<vani.patel@xxxxxxxxxxxxxx> wrote:
> +static gboolean session_browsing_cb(GIOChannel *chan, GIOCondition cond,
> +                               gpointer data)
> +{
> +       struct avctp *session = data;
> +       uint8_t  *buf;
> +       struct avctp_header *avctp;
> +       int ret, sock;
> +
> +       buf = (uint8_t *)malloc(session->browsing_mtu);
> +       if (!(cond & G_IO_IN))
> +               return FALSE;
> +
> +       sock = g_io_channel_unix_get_fd(session->browsing_io);
> +       ret = read(sock, buf, session->browsing_mtu);
> +
> +       if (ret <= 0)
> +               return FALSE;
> +
> +       if ((unsigned int) ret < sizeof(struct avctp_header)) {
> +               error("Too small AVRCP packet on browsing channel");
> +               return FALSE;
> +       }
> +
> +       avctp = (struct avctp_header *) buf;
> +
> +       if (avctp->packet_type != AVCTP_PACKET_SINGLE)
> +               return FALSE;
> +
> +
> +       return TRUE;
> +}

buf is probably leaking here, besides I don't think we really need to
have browsing channel being handled in a separated function, most of
the code should actually be similar the only difference is that the
handler list is different.

>  static gboolean session_cb(GIOChannel *chan, GIOCondition cond,
>                                 gpointer data)
>  {
> @@ -613,6 +663,47 @@ static void init_uinput(struct avctp *session)
>                 DBG("AVRCP: uinput initialized for %s", address);
>  }
>
> +static void avctp_connect_browsing_cb(GIOChannel *chan,
> +                                       GError *err,
> +                                       gpointer data)
> +{
> +       struct avctp *session = data;
> +       char address[18];
> +       uint16_t imtu;
> +       GError *gerr = NULL;
> +
> +       if (err) {
> +               error("Browsing: %s", err->message);
> +               g_io_channel_shutdown(chan, TRUE, NULL);
> +               g_io_channel_unref(chan);
> +               session->browsing_io = NULL;
> +               return;
> +       }
> +
> +       bt_io_get(chan, BT_IO_L2CAP, &gerr,
> +                       BT_IO_OPT_DEST, &address,
> +                       BT_IO_OPT_IMTU, &imtu,
> +                       BT_IO_OPT_INVALID);
> +       if (gerr) {
> +               error("%s", err->message);

Why you are printing err if the check is about gerr? Please fix this.

> +static void avctp_confirm_browsing_cb(GIOChannel *chan, gpointer data)
> +{
> +       struct avctp *session;
> +       struct audio_device *dev;
> +       char address[18];
> +       bdaddr_t src, dst;
> +       GError *err = NULL;
> +
> +       bt_io_get(chan, BT_IO_L2CAP, &err,
> +                       BT_IO_OPT_SOURCE_BDADDR, &src,
> +                       BT_IO_OPT_DEST_BDADDR, &dst,
> +                       BT_IO_OPT_DEST, address,
> +                       BT_IO_OPT_INVALID);
> +       if (err) {
> +               g_error_free(err);
> +               g_io_channel_shutdown(chan, TRUE, NULL);
> +               return;
> +       }
> +
> +       session = avctp_get_internal(&src, &dst);
> +       if (!session)
> +               goto drop;
> +
> +       dev = manager_get_device(&src, &dst, FALSE);
> +       if (!dev) {
> +               dev = manager_get_device(&src, &dst, TRUE);
> +               if (!dev) {
> +                       error("Browsing: Unable to get audio dev object for %s",
> +                                                                address);
> +                       goto drop;
> +               }
> +       }
> +
> +       if (dev->control == NULL) {
> +               btd_device_add_uuid(dev->btd_dev, AVRCP_REMOTE_UUID);
> +               if (dev->control == NULL)
> +                       goto drop;
> +       }
> +
> +       if (!session->control_io) {
> +               error("Browsing: Refusing unexpected connect from %s", address);
> +               goto drop;
> +       }
> +
> +       if (session->browsing_io) {
> +               error("Browsing channel already exist %s", address);
> +               goto drop;
> +       }
> +
> +       session->browsing_io = g_io_channel_ref(chan);
> +
> +       if (audio_device_request_authorization(dev, AVRCP_TARGET_UUID,
> +                                               auth_browsing_cb, session) < 0)
> +               goto drop;
> +       return;
> +
> +drop:
> +       if (!session || !session->control_io || !session->browsing_io)
> +               g_io_channel_shutdown(chan, TRUE, NULL);
> +
> +       if (session && session->browsing_io)
> +               g_io_channel_unref(session->browsing_io);
> +}
> +

Again here the code is very similar to control, perhaps we can have
different functions after we are done with common checks to avoid
duplicating too much code.

-- 
Luiz Augusto von Dentz
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