Re: [Bluez PATCH v3 1/3] advertising: Add SupportedFeatures to LEAdvertisingManager1

[Luiz Augusto von Dentz <luiz.dentz@gmail.com>]

Hi Daniel,

On Fri, Mar 5, 2021 at 3:59 PM Daniel Winkler <danielwinkler@google.com> wrote:
>
> The new SupportedFeatures member tells advertising clients whether the
> platform has hardware support for advertising or capability to set tx
> power of advertisements.
>
> Additionally, fix small typo in "secondary_exists" function name.
>
> Change is tested on hatch and kukui chromebooks by using dbus-send to
> verify that SupportedFeatures always exists, and is only populated when
> extended advertising is available.
>
> Reviewed-by: Miao-chen Chou <mcchou@chromium.org>
> ---
>
> Changes in v3: None
> Changes in v2:
> - Expose empty SupportedFeatures if no support available
>
>  lib/mgmt.h        |  2 ++
>  src/advertising.c | 43 +++++++++++++++++++++++++++++++++++++++++--
>  2 files changed, 43 insertions(+), 2 deletions(-)
>
> diff --git a/lib/mgmt.h b/lib/mgmt.h
> index 76a03c9c2..c0021abd8 100644
> --- a/lib/mgmt.h
> +++ b/lib/mgmt.h
> @@ -503,6 +503,8 @@ struct mgmt_rp_add_advertising {
>  #define MGMT_ADV_FLAG_SEC_1M           (1 << 7)
>  #define MGMT_ADV_FLAG_SEC_2M           (1 << 8)
>  #define MGMT_ADV_FLAG_SEC_CODED                (1 << 9)
> +#define MGMT_ADV_FLAG_CAN_SET_TX_POWER (1 << 10)
> +#define MGMT_ADV_FLAG_HW_OFFLOAD       (1 << 11)
>  #define MGMT_ADV_PARAM_DURATION                (1 << 12)
>  #define MGMT_ADV_PARAM_TIMEOUT         (1 << 13)
>  #define MGMT_ADV_PARAM_INTERVALS       (1 << 14)
> diff --git a/src/advertising.c b/src/advertising.c
> index 15a343e52..dd6008cb9 100644
> --- a/src/advertising.c
> +++ b/src/advertising.c
> @@ -1616,7 +1616,8 @@ static void append_secondary(struct btd_adv_manager *manager,
>         }
>  }
>
> -static gboolean secondary_exits(const GDBusPropertyTable *property, void *data)
> +static gboolean secondary_exists(const GDBusPropertyTable *property,
> +                                               void *data)
>  {
>         struct btd_adv_manager *manager = data;
>
> @@ -1640,6 +1641,43 @@ static gboolean get_supported_secondary(const GDBusPropertyTable *property,
>         return TRUE;
>  }
>
> +static struct adv_feature {
> +       int flag;
> +       const char *name;
> +} features[] = {
> +       { MGMT_ADV_FLAG_CAN_SET_TX_POWER, "CanSetTxPower" },
> +       { MGMT_ADV_FLAG_HW_OFFLOAD, "HardwareOffload" },
> +       { },
> +};
> +
> +static void append_features(struct btd_adv_manager *manager,
> +                                               DBusMessageIter *iter)
> +{
> +       struct adv_feature *feat;
> +
> +       for (feat = features; feat->name; feat++) {
> +               if (manager->supported_flags & feat->flag)
> +                       dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING,
> +                                                               &feat->name);
> +       }
> +}
> +
> +static gboolean get_supported_features(const GDBusPropertyTable *property,
> +                                       DBusMessageIter *iter, void *data)
> +{
> +       struct btd_adv_manager *manager = data;
> +       DBusMessageIter entry;
> +
> +       dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY,
> +                                       DBUS_TYPE_STRING_AS_STRING, &entry);
> +
> +       append_features(manager, &entry);
> +
> +       dbus_message_iter_close_container(iter, &entry);
> +
> +       return TRUE;
> +}
> +
>  static gboolean get_supported_cap(const GDBusPropertyTable *property,
>                                         DBusMessageIter *iter, void *data)
>  {
> @@ -1678,7 +1716,8 @@ static const GDBusPropertyTable properties[] = {
>         { "SupportedInstances", "y", get_instances, NULL, NULL },
>         { "SupportedIncludes", "as", get_supported_includes, NULL, NULL },
>         { "SupportedSecondaryChannels", "as", get_supported_secondary, NULL,
> -                                                       secondary_exits },
> +                                                       secondary_exists },
> +       { "SupportedFeatures", "as", get_supported_features, NULL, NULL },

Missing G_DBUS_PROPERTY_FLAG_EXPERIMENTAL.

>         { "SupportedCapabilities", "a{sv}", get_supported_cap, NULL, NULL,
>                                         G_DBUS_PROPERTY_FLAG_EXPERIMENTAL},
>         { }
> --
> 2.30.1.766.gb4fecdf3b7-goog
>


-- 
Luiz Augusto von Dentz