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Bluetooth: Store current RPA and update it if needed 

The RPA needs to be stored to know which is the current one. Otherwise
it is impossible to ensure that always the correct RPA can be programmed
into the controller when it is needed.

Current code checks if the address in the controller is a RPA, but that
can potentially lead to using a RPA that can not be resolved with the
IRK that has been distributed.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2014-02-23 20:39:22 -08:00 committed by Johan Hedberg
parent 41c90c186a
commit 2b5224dca5
2 changed files with 6 additions and 6 deletions
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1
include/net/bluetooth/hci_core.h
View File

@ -308,6 +308,7 @@ struct hci_dev {
__u8 irk[16];
__u32 rpa_timeout;
struct delayed_work rpa_expired;
bdaddr_t rpa;
int (*open)(struct hci_dev *hdev);
int (*close)(struct hci_dev *hdev);

11
net/bluetooth/hci_core.c
View File

@ -3339,26 +3339,25 @@ int hci_update_random_address(struct hci_request *req, bool require_privacy,
int err;
/* If privacy is enabled use a resolvable private address. If
* the current RPA has expired or there's something else than an
* RPA currently in use regenerate a new one.
* current RPA has expired or there is something else than
* the current RPA in use, then generate a new one.
*/
if (test_bit(HCI_PRIVACY, &hdev->dev_flags)) {
bdaddr_t rpa;
int to;
*own_addr_type = ADDR_LE_DEV_RANDOM;
if (!test_and_clear_bit(HCI_RPA_EXPIRED, &hdev->dev_flags) &&
hci_bdaddr_is_rpa(&hdev->random_addr, ADDR_LE_DEV_RANDOM))
!bacmp(&hdev->random_addr, &hdev->rpa))
return 0;
err = smp_generate_rpa(hdev->tfm_aes, hdev->irk, &rpa);
err = smp_generate_rpa(hdev->tfm_aes, hdev->irk, &hdev->rpa);
if (err < 0) {
BT_ERR("%s failed to generate new RPA", hdev->name);
return err;
}
hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6, &rpa);
hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6, &hdev->rpa);
to = msecs_to_jiffies(hdev->rpa_timeout * 1000);
queue_delayed_work(hdev->workqueue, &hdev->rpa_expired, to);