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Bluetooth: Add hci_update_random_address() convenience function 

This patch adds a convenience function for updating the local random
address which is needed before advertising, scanning and initiating LE
connections.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2014-02-23 19:42:21 +02:00 committed by Marcel Holtmann
parent d6bfd59cae
commit ebd3a74765
2 changed files with 57 additions and 0 deletions
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2
include/net/bluetooth/hci_core.h
View File

@ -1257,6 +1257,8 @@ void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8],
__u8 ltk[16]);
int hci_update_random_address(struct hci_request *req, u8 *own_addr_type);
#define SCO_AIRMODE_MASK 0x0003
#define SCO_AIRMODE_CVSD 0x0000
#define SCO_AIRMODE_TRANSP 0x0003

55
net/bluetooth/hci_core.c
View File

@ -3276,6 +3276,61 @@ static void le_scan_disable_work(struct work_struct *work)
BT_ERR("Disable LE scanning request failed: err %d", err);
}
int hci_update_random_address(struct hci_request *req, u8 *own_addr_type)
{
struct hci_dev *hdev = req->hdev;
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.
*/
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))
return 0;
err = smp_generate_rpa(hdev->tfm_aes, hdev->irk, &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);
to = msecs_to_jiffies(hdev->rpa_timeout * 1000);
queue_delayed_work(hdev->workqueue, &hdev->rpa_expired, to);
return 0;
}
/* If forcing static address is in use or there is no public
* address use the static address as random address (but skip
* the HCI command if the current random address is already the
* static one.
*/
if (test_bit(HCI_FORCE_STATIC_ADDR, &hdev->dev_flags) ||
!bacmp(&hdev->bdaddr, 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,
&hdev->static_addr);
return 0;
}
/* Neither privacy nor static address is being used so use a
* public address.
*/
*own_addr_type = ADDR_LE_DEV_PUBLIC;
return 0;
}
/* Alloc HCI device */
struct hci_dev *hci_alloc_dev(void)
{