Bluetooth: ISO: Pass BIG encryption info through QoS

This enables a broadcast sink to be informed if the PA
it has synced with is associated with an encrypted BIG,
by retrieving the socket QoS and checking the encryption
field.

After PA sync has been successfully established and the
first BIGInfo advertising report is received, a new hcon
is added and notified to the ISO layer. The ISO layer
sets the encryption field of the socket and hcon QoS
according to the encryption parameter of the BIGInfo
advertising report event.

After that, the userspace is woken up, and the QoS of the
new PA sync socket can be read, to inspect the encryption
field and follow up accordingly.

Signed-off-by: Iulia Tanasescu <iulia.tanasescu@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

1 files changed, 40 insertions, 14 deletions

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 1e1c9147356c..9b34c9f8ee02 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -6603,7 +6603,7 @@ static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
 	struct hci_ev_le_pa_sync_established *ev = data;
 	int mask = hdev->link_mode;
 	__u8 flags = 0;
-	struct hci_conn *bis;
+	struct hci_conn *pa_sync;
 
 	bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
 
@@ -6620,20 +6620,19 @@ static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
 	if (!(flags & HCI_PROTO_DEFER))
 		goto unlock;
 
-	/* Add connection to indicate the PA sync event */
-	bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
-			   HCI_ROLE_SLAVE);
+	if (ev->status) {
+		/* Add connection to indicate the failed PA sync event */
+		pa_sync = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
+				       HCI_ROLE_SLAVE);
 
-	if (!bis)
-		goto unlock;
+		if (!pa_sync)
+			goto unlock;
 
-	if (ev->status)
-		set_bit(HCI_CONN_PA_SYNC_FAILED, &bis->flags);
-	else
-		set_bit(HCI_CONN_PA_SYNC, &bis->flags);
+		set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
 
-	/* Notify connection to iso layer */
-	hci_connect_cfm(bis, ev->status);
+		/* Notify iso layer */
+		hci_connect_cfm(pa_sync, ev->status);
+	}
 
 unlock:
 	hci_dev_unlock(hdev);
@@ -7125,7 +7124,7 @@ static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
 	hci_dev_lock(hdev);
 
 	if (!ev->status) {
-		pa_sync = hci_conn_hash_lookup_pa_sync(hdev, ev->handle);
+		pa_sync = hci_conn_hash_lookup_pa_sync_big_handle(hdev, ev->handle);
 		if (pa_sync)
 			/* Also mark the BIG sync established event on the
 			 * associated PA sync hcon
@@ -7186,15 +7185,42 @@ static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
 	struct hci_evt_le_big_info_adv_report *ev = data;
 	int mask = hdev->link_mode;
 	__u8 flags = 0;
+	struct hci_conn *pa_sync;
 
 	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))
+	if (!(mask & HCI_LM_ACCEPT)) {
 		hci_le_pa_term_sync(hdev, ev->sync_handle);
+		goto unlock;
+	}
 
+	if (!(flags & HCI_PROTO_DEFER))
+		goto unlock;
+
+	pa_sync = hci_conn_hash_lookup_pa_sync_handle
+			(hdev,
+			le16_to_cpu(ev->sync_handle));
+
+	if (pa_sync)
+		goto unlock;
+
+	/* Add connection to indicate the PA sync event */
+	pa_sync = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
+			       HCI_ROLE_SLAVE);
+
+	if (!pa_sync)
+		goto unlock;
+
+	pa_sync->sync_handle = le16_to_cpu(ev->sync_handle);
+	set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags);
+
+	/* Notify iso layer */
+	hci_connect_cfm(pa_sync, 0x00);
+
+unlock:
 	hci_dev_unlock(hdev);
 }