Commit 50b5b952 authored by Marcel Holtmann's avatar Marcel Holtmann Committed by Johan Hedberg
Browse files

Bluetooth: Support static address when BR/EDR has been disabled 



Every BR/EDR/LE dual-mode controller requires to have a public address
and so far that has become the identity address and own address. The
only way to change that behavior was with a force_static_address
debugfs option.

However the host can actually disable the BR/EDR part of a dual-mode
controller and turn into a single mode LE controller. In that case
it makes perfect sense for a host to use a chosen static address
instead of the public address.

So if the host disables BR/EDR and configures a static address, then
that static address is used as identity address and own address. If
the host does not configure a static address, then the public address
is used as before.

Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
parent cd1c5665

net/bluetooth/hci_core.c

+7 −1
Original line number Diff line number Diff line
@@ -3852,12 +3852,18 @@ static void le_scan_disable_work(struct work_struct *work) 
 *

 * For debugging purposes it is possible to force controllers with a

 * public address to use the static random address instead.

 *

 * In case BR/EDR has been disabled on a dual-mode controller and

 * userspace has configured a static address, then that address

 * becomes the identity address instead of the public BR/EDR address.

 */

void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,

			       u8 *bdaddr_type)

{

	if (test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dbg_flags) ||

	    !bacmp(&hdev->bdaddr, BDADDR_ANY)) {

	    !bacmp(&hdev->bdaddr, BDADDR_ANY) ||

	    (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags) &&

	     bacmp(&hdev->static_addr, BDADDR_ANY))) {

		bacpy(bdaddr, &hdev->static_addr);

		*bdaddr_type = ADDR_LE_DEV_RANDOM;

	} else {

net/bluetooth/hci_request.c

+7 −1
Original line number Diff line number Diff line
@@ -378,9 +378,15 @@ int hci_update_random_address(struct hci_request *req, bool require_privacy, 
	 * address use the static address as random address (but skip

	 * the HCI command if the current random address is already the

	 * static one.

	 *

	 * In case BR/EDR has been disabled on a dual-mode controller

	 * and a static address has been configured, then use that

	 * address instead of the public BR/EDR address.

	 */

	if (test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dbg_flags) ||

	    !bacmp(&hdev->bdaddr, BDADDR_ANY)) {

	    !bacmp(&hdev->bdaddr, BDADDR_ANY) ||

	    (!test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags) &&

	     bacmp(&hdev->static_addr, BDADDR_ANY))) {

		*own_addr_type = ADDR_LE_DEV_RANDOM;

		if (bacmp(&hdev->static_addr, &hdev->random_addr))

			hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6,

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