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: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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@ -5380,9 +5380,10 @@ void hci_update_background_scan(struct hci_dev *hdev)
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hci_req_init(&req, hdev);
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if (list_empty(&hdev->pend_le_conns)) {
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/* If there is no pending LE connections, we should stop
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* the background scanning.
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if (list_empty(&hdev->pend_le_conns) && !hdev->pend_le_reports) {
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/* If there is no pending LE connections or devices
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* to be scanned for, we should stop the background
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* scanning.
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*/
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/* If controller is not scanning we are done. */
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@ -4225,11 +4225,32 @@ static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
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bool match;
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u32 flags;
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/* Passive scanning shouldn't trigger any device found events */
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/* Passive scanning shouldn't trigger any device found events,
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* except for devices marked as CONN_REPORT for which we do send
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* device found events.
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*/
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if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
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struct hci_conn_params *param;
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if (type == LE_ADV_IND || type == LE_ADV_DIRECT_IND)
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check_pending_le_conn(hdev, bdaddr, bdaddr_type);
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return;
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if (!hdev->pend_le_reports)
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return;
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if (type == LE_ADV_DIRECT_IND)
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return;
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param = hci_conn_params_lookup(hdev, bdaddr, bdaddr_type);
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if (!param || param->auto_connect != HCI_AUTO_CONN_REPORT)
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return;
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if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
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flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
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else
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flags = 0;
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mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
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rssi, flags, data, len, NULL, 0);
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}
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/* When receiving non-connectable or scannable undirected
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