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Bluetooth: Introduce HCI_CONN_FLAG_DEVICE_PRIVACY device flag

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This introduces HCI_CONN_FLAG_DEVICE_PRIVACY which can be used by
userspace to indicate to the controller to use Device Privacy Mode to a
specific device.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Luiz Augusto von Dentz 2021-12-03 14:07:22 -08:00 committed by Marcel Holtmann
parent 800fe5ec30
commit 6126ffabba
2 changed files with 16 additions and 0 deletions
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4
include/net/bluetooth/hci_core.h
View file

@ -154,6 +154,7 @@ struct bdaddr_list_with_irk {
enum hci_conn_flags {
HCI_CONN_FLAG_REMOTE_WAKEUP,
HCI_CONN_FLAG_DEVICE_PRIVACY,
__HCI_CONN_NUM_FLAGS,
};
@ -1466,6 +1467,9 @@ void hci_conn_del_sysfs(struct hci_conn *conn);
#define use_ll_privacy(dev) (ll_privacy_capable(dev) && \
hci_dev_test_flag(dev, HCI_ENABLE_LL_PRIVACY))
#define privacy_mode_capable(dev) (use_ll_privacy(dev) && \
(hdev->commands[39] & 0x04))
/* Use enhanced synchronous connection if command is supported */
#define enhanced_sco_capable(dev) ((dev)->commands[29] & 0x08)

12
net/bluetooth/mgmt.c
View file

@ -3978,6 +3978,11 @@ static int exp_ll_privacy_feature_changed(bool enabled, struct hci_dev *hdev,
memcpy(ev.uuid, rpa_resolution_uuid, 16);
ev.flags = cpu_to_le32((enabled ? BIT(0) : 0) | BIT(1));
if (enabled && privacy_mode_capable(hdev))
set_bit(HCI_CONN_FLAG_DEVICE_PRIVACY, hdev->conn_flags);
else
clear_bit(HCI_CONN_FLAG_DEVICE_PRIVACY, hdev->conn_flags);
return mgmt_limited_event(MGMT_EV_EXP_FEATURE_CHANGED, hdev,
&ev, sizeof(ev),
HCI_MGMT_EXP_FEATURE_EVENTS, skip);
@ -4461,6 +4466,13 @@ static int set_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
if (params) {
bitmap_from_u64(params->flags, current_flags);
status = MGMT_STATUS_SUCCESS;
/* Update passive scan if HCI_CONN_FLAG_DEVICE_PRIVACY
* has been set.
*/
if (test_bit(HCI_CONN_FLAG_DEVICE_PRIVACY,
params->flags))
hci_update_passive_scan(hdev);
} else {
bt_dev_warn(hdev, "No such LE device %pMR (0x%x)",
&cp->addr.bdaddr,