Commit 0d2bf134 authored by Johan Hedberg's avatar Johan Hedberg Committed by Marcel Holtmann
Browse files

Bluetooth: Add support for background LE scanning 



If we have one or more devices with HCI_AUTO_CONN_REPORT we should do
background scanning and emit mgmt_device_found events. This patch
modifies the hci_update_background_scan() function to extend the
conditions needed to trigger scanning, and adds the necessary code to
process_adv_report() to emit mgmt_device_found events.

Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 75ce208c

net/bluetooth/hci_core.c

+4 −3
Original line number Diff line number Diff line
@@ -5380,9 +5380,10 @@ void hci_update_background_scan(struct hci_dev *hdev) 


	hci_req_init(&req, hdev);



	if (list_empty(&hdev->pend_le_conns)) {

		/* If there is no pending LE connections, we should stop

		 * the background scanning.

	if (list_empty(&hdev->pend_le_conns) && !hdev->pend_le_reports) {

		/* If there is no pending LE connections or devices

		 * to be scanned for, we should stop the background

		 * scanning.

		 */



		/* If controller is not scanning we are done. */

net/bluetooth/hci_event.c

+23 −2
Original line number Diff line number Diff line
@@ -4225,11 +4225,32 @@ static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr, 
	bool match;

	u32 flags;



	/* Passive scanning shouldn't trigger any device found events */

	/* Passive scanning shouldn't trigger any device found events,

	 * except for devices marked as CONN_REPORT for which we do send

	 * device found events.

	 */

	if (hdev->le_scan_type == LE_SCAN_PASSIVE) {

		struct hci_conn_params *param;



		if (type == LE_ADV_IND || type == LE_ADV_DIRECT_IND)

			check_pending_le_conn(hdev, bdaddr, bdaddr_type);



		if (!hdev->pend_le_reports)

			return;



		if (type == LE_ADV_DIRECT_IND)

			return;



		param = hci_conn_params_lookup(hdev, bdaddr, bdaddr_type);

		if (!param || param->auto_connect != HCI_AUTO_CONN_REPORT)

			return;



		if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)

			flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;

		else

			flags = 0;

		mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,

				  rssi, flags, data, len, NULL, 0);

	}



	/* When receiving non-connectable or scannable undirected