Bluetooth: Handle ADv set terminated event

This event comes after connection complete event for incoming
connections. Since we now have different random address for
each instance, conn resp address is assigned from this event.

As of now only connection part is handled as we are not
enabling duration or max num of events while starting ext adv.
Signed-off-by: Jaganath Kanakkassery <jaganathx.kanakkassery@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

include/net/bluetooth/hci.h

@@ -2155,6 +2155,14 @@ struct hci_ev_le_enh_conn_complete {
 	__u8      clk_accurancy;
 } __packed;
 
+#define HCI_EV_LE_EXT_ADV_SET_TERM	0x12
+struct hci_evt_le_ext_adv_set_term {
+	__u8	status;
+	__u8	handle;
+	__le16	conn_handle;
+	__u8	num_evts;
+} __packed;
+
 /* Internal events generated by Bluetooth stack */
 #define HCI_EV_STACK_INTERNAL	0xfd
 struct hci_ev_stack_internal {

net/bluetooth/hci_core.c

@@ -712,6 +712,14 @@ static int hci_init3_req(struct hci_request *req, unsigned long opt)
 						 * Complete
 						 */
 
+		/* If the controller supports the LE Extended Advertising
+		 * command, enable the corresponding event.
+		 */
+		if (ext_adv_capable(hdev))
+			events[2] |= 0x02;	/* LE Advertising Set
+						 * Terminated
+						 */
+
 		hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
 			    events);
 

net/bluetooth/hci_event.c

@@ -4798,10 +4798,15 @@ static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
 		 * the advertising address type.
 		 */
 		conn->resp_addr_type = hdev->adv_addr_type;
-		if (hdev->adv_addr_type == ADDR_LE_DEV_RANDOM)
-			bacpy(&conn->resp_addr, &hdev->random_addr);
-		else
+		if (hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
+			/* In case of ext adv, resp_addr will be updated in
+			 * Adv Terminated event.
+			 */
+			if (!ext_adv_capable(hdev))
+				bacpy(&conn->resp_addr, &hdev->random_addr);
+		} else {
 			bacpy(&conn->resp_addr, &hdev->bdaddr);
+		}
 
 		conn->init_addr_type = bdaddr_type;
 		bacpy(&conn->init_addr, bdaddr);
@@ -4931,6 +4936,34 @@ static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev,
 			     le16_to_cpu(ev->supervision_timeout));
 }
 
+static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct hci_evt_le_ext_adv_set_term *ev = (void *) skb->data;
+	struct hci_conn *conn;
+
+	BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
+
+	if (ev->status)
+		return;
+
+	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
+	if (conn) {
+		struct adv_info *adv_instance;
+
+		if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM)
+			return;
+
+		if (!hdev->cur_adv_instance) {
+			bacpy(&conn->resp_addr, &hdev->random_addr);
+			return;
+		}
+
+		adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
+		if (adv_instance)
+			bacpy(&conn->resp_addr, &adv_instance->random_addr);
+	}
+}
+
 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev,
 					    struct sk_buff *skb)
 {
@@ -5578,6 +5611,10 @@ static void hci_le_meta_evt(struct hci_dev *hdev, struct sk_buff *skb)
 		hci_le_enh_conn_complete_evt(hdev, skb);
 		break;
 
+	case HCI_EV_LE_EXT_ADV_SET_TERM:
+		hci_le_ext_adv_term_evt(hdev, skb);
+		break;
+
 	default:
 		break;
 	}