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Bluetooth: ISO: Add support for periodic adv reports processing

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In the case of a Periodic Synchronized Receiver,
the PA report received from a Broadcaster contains the BASE,
which has information about codec and other parameters of a BIG.
This isnformation is stored and the application can retrieve it
using getsockopt(BT_ISO_BASE).

Signed-off-by: Claudia Draghicescu <claudia.rosu@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Claudia Draghicescu 2023-06-30 12:59:28 +03:00 committed by Luiz Augusto von Dentz
parent 3344d31833
commit 9c0826310b
3 changed files with 61 additions and 1 deletions
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11
include/net/bluetooth/hci.h
View File

@ -2771,6 +2771,17 @@ struct hci_ev_le_enh_conn_complete {
__u8 clk_accurancy;
} __packed;
#define HCI_EV_LE_PER_ADV_REPORT 0x0f
struct hci_ev_le_per_adv_report {
__le16 sync_handle;
__u8 tx_power;
__u8 rssi;
__u8 cte_type;
__u8 data_status;
__u8 length;
__u8 data[];
} __packed;
#define HCI_EV_LE_EXT_ADV_SET_TERM 0x12
struct hci_evt_le_ext_adv_set_term {
__u8 status;

23
net/bluetooth/hci_event.c
View File

@ -6617,6 +6617,24 @@ static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
hci_dev_unlock(hdev);
}
static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
struct sk_buff *skb)
{
struct hci_ev_le_per_adv_report *ev = data;
int mask = hdev->link_mode;
__u8 flags = 0;
bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
hci_dev_lock(hdev);
mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
if (!(mask & HCI_LM_ACCEPT))
hci_le_pa_term_sync(hdev, ev->sync_handle);
hci_dev_unlock(hdev);
}
static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
struct sk_buff *skb)
{
@ -7213,6 +7231,11 @@ static const struct hci_le_ev {
HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
hci_le_pa_sync_estabilished_evt,
sizeof(struct hci_ev_le_pa_sync_established)),
/* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
hci_le_per_adv_report_evt,
sizeof(struct hci_ev_le_per_adv_report),
HCI_MAX_EVENT_SIZE),
/* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
sizeof(struct hci_evt_le_ext_adv_set_term)),

28
net/bluetooth/iso.c
View File

@ -1446,7 +1446,8 @@ static int iso_sock_getsockopt(struct socket *sock, int level, int optname,
break;
case BT_ISO_BASE:
if (sk->sk_state == BT_CONNECTED) {
if (sk->sk_state == BT_CONNECTED &&
!bacmp(&iso_pi(sk)->dst, BDADDR_ANY)) {
base_len = iso_pi(sk)->conn->hcon->le_per_adv_data_len;
base = iso_pi(sk)->conn->hcon->le_per_adv_data;
} else {
@ -1655,6 +1656,9 @@ static void iso_conn_ready(struct iso_conn *conn)
bacpy(&iso_pi(sk)->dst, &hcon->dst);
iso_pi(sk)->dst_type = hcon->dst_type;
iso_pi(sk)->sync_handle = iso_pi(parent)->sync_handle;
memcpy(iso_pi(sk)->base, iso_pi(parent)->base, iso_pi(parent)->base_len);
iso_pi(sk)->base_len = iso_pi(parent)->base_len;
hci_conn_hold(hcon);
iso_chan_add(conn, sk, parent);
@ -1692,12 +1696,20 @@ static bool iso_match_sync_handle(struct sock *sk, void *data)
return le16_to_cpu(ev->sync_handle) == iso_pi(sk)->sync_handle;
}
static bool iso_match_sync_handle_pa_report(struct sock *sk, void *data)
{
struct hci_ev_le_per_adv_report *ev = data;
return le16_to_cpu(ev->sync_handle) == iso_pi(sk)->sync_handle;
}
/* ----- ISO interface with lower layer (HCI) ----- */
int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
{
struct hci_ev_le_pa_sync_established *ev1;
struct hci_evt_le_big_info_adv_report *ev2;
struct hci_ev_le_per_adv_report *ev3;
struct sock *sk;
int lm = 0;
@ -1713,6 +1725,9 @@ int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
* 2. HCI_EVT_LE_BIG_INFO_ADV_REPORT: When connect_ind is triggered by a
* a BIG Info it attempts to check if there any listening socket with
* the same sync_handle and if it does then attempt to create a sync.
* 3. HCI_EV_LE_PER_ADV_REPORT: When a PA report is received, it is stored
* in iso_pi(sk)->base so it can be passed up to user, in the case of a
* broadcast sink.
*/
ev1 = hci_recv_event_data(hdev, HCI_EV_LE_PA_SYNC_ESTABLISHED);
if (ev1) {
@ -1752,6 +1767,17 @@ int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
}
}
}
}
ev3 = hci_recv_event_data(hdev, HCI_EV_LE_PER_ADV_REPORT);
if (ev3) {
sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr,
iso_match_sync_handle_pa_report, ev3);
if (sk) {
memcpy(iso_pi(sk)->base, ev3->data, ev3->length);
iso_pi(sk)->base_len = ev3->length;
}
} else {
sk = iso_get_sock_listen(&hdev->bdaddr, BDADDR_ANY, NULL, NULL);
}