Re: [PATCH v4 05/13] Bluetooth: Handle extended ADV PDU types

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Hi Jaganath,

> This patch defines the extended ADV types and handle it in ADV report.
> 
> Signed-off-by: Jaganath Kanakkassery <jaganathx.kanakkassery@xxxxxxxxx>
> ---
> include/net/bluetooth/hci.h |  8 ++++++++
> net/bluetooth/hci_event.c   | 49 +++++++++++++++++++++++++++++++--------------
> 2 files changed, 42 insertions(+), 15 deletions(-)
> 
> diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
> index 3584632..fcd1d57 100644
> --- a/include/net/bluetooth/hci.h
> +++ b/include/net/bluetooth/hci.h
> @@ -1977,6 +1977,14 @@ struct hci_ev_le_conn_complete {
> #define LE_LEGACY_SCAN_RSP_ADV		0x001b
> #define LE_LEGACY_SCAN_RSP_ADV_SCAN	0x001a
> 
> +/* Extended Advertising event types */
> +#define LE_EXT_ADV_NON_CONN_IND		0x0000
> +#define LE_EXT_ADV_CONN_IND		0x0001
> +#define LE_EXT_ADV_SCAN_IND		0x0002
> +#define LE_EXT_ADV_DIRECT_IND		0x0004
> +#define LE_EXT_ADV_SCAN_RSP		0x0008
> +#define LE_EXT_ADV_LEGACY_PDU		0x0010
> +
> #define ADDR_LE_DEV_PUBLIC	0x00
> #define ADDR_LE_DEV_RANDOM	0x01
> 
> diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
> index 6942315..027abe6 100644
> --- a/net/bluetooth/hci_event.c
> +++ b/net/bluetooth/hci_event.c
> @@ -5137,20 +5137,39 @@ static void hci_le_adv_report_evt(struct hci_dev *hdev, struct sk_buff *skb)
> 	hci_dev_unlock(hdev);
> }
> 
> -static u8 convert_legacy_evt_type(u16 evt_type)
> -{
> -	switch (evt_type) {
> -	case LE_LEGACY_ADV_IND:
> -		return LE_ADV_IND;
> -	case LE_LEGACY_ADV_DIRECT_IND:
> -		return LE_ADV_DIRECT_IND;
> -	case LE_LEGACY_ADV_SCAN_IND:
> -		return LE_ADV_SCAN_IND;
> -	case LE_LEGACY_NONCONN_IND:
> -		return LE_ADV_NONCONN_IND;
> -	case LE_LEGACY_SCAN_RSP_ADV:
> -	case LE_LEGACY_SCAN_RSP_ADV_SCAN:
> -		return LE_ADV_SCAN_RSP;
> +static u8 convert_ext_evt_type(u16 evt_type)
> +{
> +	if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
> +		switch (evt_type) {
> +		case LE_LEGACY_ADV_IND:
> +			return LE_ADV_IND;
> +		case LE_LEGACY_ADV_DIRECT_IND:
> +			return LE_ADV_DIRECT_IND;
> +		case LE_LEGACY_ADV_SCAN_IND:
> +			return LE_ADV_SCAN_IND;
> +		case LE_LEGACY_NONCONN_IND:
> +			return LE_ADV_NONCONN_IND;
> +		case LE_LEGACY_SCAN_RSP_ADV:
> +		case LE_LEGACY_SCAN_RSP_ADV_SCAN:
> +			return LE_ADV_SCAN_RSP;
> +		}

I would do a return here since only the legacy part is special.

> +	} else {
> +		if (evt_type & LE_EXT_ADV_CONN_IND) {
> +			if (evt_type & LE_EXT_ADV_DIRECT_IND)
> +				return LE_ADV_DIRECT_IND;
> +
> +			return LE_ADV_IND;
> +		}
> +
> +		if (evt_type & LE_EXT_ADV_SCAN_RSP)
> +			return LE_ADV_SCAN_RSP;
> +
> +		if (evt_type & LE_EXT_ADV_SCAN_IND)
> +			return LE_ADV_SCAN_IND;
> +
> +		if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
> +		    evt_type & LE_EXT_ADV_DIRECT_IND)
> +			return LE_ADV_NONCONN_IND;

Why do we have one == match here and the rest are bit checks.

> 	}
> 
> 	BT_ERR_RATELIMITED("Unknown advertising packet type: 0x%02x",
> @@ -5172,7 +5191,7 @@ static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, struct sk_buff *skb)
> 		u16 evt_type;
> 
> 		evt_type = __le16_to_cpu(ev->evt_type);
> -		legacy_evt_type = convert_legacy_evt_type(evt_type);
> +		legacy_evt_type = convert_ext_evt_type(evt_type);

So ext_evt_type_to_legacy might be a better function name here.

> 		if (legacy_evt_type != LE_ADV_INVALID) {

I might have asked this before, when are we reaching _INVALID here?

> 			process_adv_report(hdev, legacy_evt_type, &ev->bdaddr,
> 					   ev->bdaddr_type, NULL, 0, ev->rssi,

Regards

Marcel

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