#define HCI_OP_LE_CLEAR_ADV_SETS 0x203d
+#define HCI_OP_LE_SET_ADV_SET_RAND_ADDR 0x2035
+struct hci_cp_le_set_adv_set_rand_addr {
+ __u8 handle;
+ bdaddr_t bdaddr;
+} __packed;
+
/* ---- HCI Events ---- */
#define HCI_EV_INQUIRY_COMPLETE 0x01
__u16 scan_rsp_len;
__u8 scan_rsp_data[HCI_MAX_AD_LENGTH];
__s8 tx_power;
+ bdaddr_t random_addr;
+ bool rpa_expired;
+ struct delayed_work rpa_expired_cb;
};
#define HCI_MAX_ADV_INSTANCES 5
u16 scan_rsp_len, u8 *scan_rsp_data,
u16 timeout, u16 duration);
int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
+void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired);
void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
if (ext_adv_capable(hdev)) {
struct hci_cp_le_set_ext_adv_params cp;
+ bdaddr_t random_addr;
+
+ /* Set require_privacy to false so that the remote device has a
+ * chance of identifying us.
+ */
+ if (hci_get_random_address(hdev, false, conn_use_rpa(conn), NULL,
+ &own_addr_type, &random_addr) < 0)
+ return;
memset(&cp, 0, sizeof(cp));
hci_req_add(req, HCI_OP_LE_SET_EXT_ADV_PARAMS, sizeof(cp), &cp);
+ if (own_addr_type == ADDR_LE_DEV_RANDOM &&
+ bacmp(&random_addr, BDADDR_ANY) &&
+ bacmp(&random_addr, &hdev->random_addr)) {
+ struct hci_cp_le_set_adv_set_rand_addr cp;
+
+ memset(&cp, 0, sizeof(cp));
+
+ cp.handle = 0;
+ bacpy(&cp.bdaddr, &random_addr);
+
+ hci_req_add(req,
+ HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
+ sizeof(cp), &cp);
+ }
+
__hci_req_enable_ext_advertising(req);
} else {
struct hci_cp_le_set_adv_param cp;
if (!ret) {
hci_dev_hold(hdev);
hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
+ hci_adv_instances_set_rpa_expired(hdev, true);
set_bit(HCI_UP, &hdev->flags);
hci_sock_dev_event(hdev, HCI_DEV_UP);
hci_leds_update_powered(hdev, true);
if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
cancel_delayed_work(&hdev->service_cache);
- if (hci_dev_test_flag(hdev, HCI_MGMT))
+ if (hci_dev_test_flag(hdev, HCI_MGMT)) {
+ struct adv_info *adv_instance;
+
cancel_delayed_work_sync(&hdev->rpa_expired);
+ list_for_each_entry(adv_instance, &hdev->adv_instances, list)
+ cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
+ }
+
/* Avoid potential lockdep warnings from the *_flush() calls by
* ensuring the workqueue is empty up front.
*/
hdev->cur_adv_instance = 0x00;
}
+ cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
+
list_del(&adv_instance->list);
kfree(adv_instance);
return 0;
}
+void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
+{
+ struct adv_info *adv_instance, *n;
+
+ list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
+ adv_instance->rpa_expired = rpa_expired;
+}
+
/* This function requires the caller holds hdev->lock */
void hci_adv_instances_clear(struct hci_dev *hdev)
{
}
list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
+ cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
list_del(&adv_instance->list);
kfree(adv_instance);
}
hdev->cur_adv_instance = 0x00;
}
+static void adv_instance_rpa_expired(struct work_struct *work)
+{
+ struct adv_info *adv_instance = container_of(work, struct adv_info,
+ rpa_expired_cb.work);
+
+ BT_DBG("");
+
+ adv_instance->rpa_expired = true;
+}
+
/* This function requires the caller holds hdev->lock */
int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
u16 adv_data_len, u8 *adv_data,
adv_instance->tx_power = HCI_TX_POWER_INVALID;
+ INIT_DELAYED_WORK(&adv_instance->rpa_expired_cb,
+ adv_instance_rpa_expired);
+
BT_DBG("%s for %dMR", hdev->name, instance);
return 0;
hci_dev_unlock(hdev);
}
+static void hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev,
+ struct sk_buff *skb)
+{
+ __u8 status = *((__u8 *) skb->data);
+ struct hci_cp_le_set_adv_set_rand_addr *cp;
+ struct adv_info *adv_instance;
+
+ if (status)
+ return;
+
+ cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR);
+ if (!cp)
+ return;
+
+ hci_dev_lock(hdev);
+
+ if (!hdev->cur_adv_instance) {
+ /* Store in hdev for instance 0 (Set adv and Directed advs) */
+ bacpy(&hdev->random_addr, &cp->bdaddr);
+ } else {
+ adv_instance = hci_find_adv_instance(hdev,
+ hdev->cur_adv_instance);
+ if (adv_instance)
+ bacpy(&adv_instance->random_addr, &cp->bdaddr);
+ }
+
+ hci_dev_unlock(hdev);
+}
+
static void hci_cc_le_set_adv_enable(struct hci_dev *hdev, struct sk_buff *skb)
{
__u8 *sent, status = *((__u8 *) skb->data);
/* We should disregard the current RPA and generate a new one
* whenever the encryption procedure fails.
*/
- if (ev->status && conn->type == LE_LINK)
+ if (ev->status && conn->type == LE_LINK) {
hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
+ hci_adv_instances_set_rpa_expired(hdev, true);
+ }
clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
hci_cc_le_set_ext_adv_enable(hdev, skb);
break;
+ case HCI_OP_LE_SET_ADV_SET_RAND_ADDR:
+ hci_cc_le_set_adv_set_random_addr(hdev, skb);
+ break;
+
default:
BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode);
break;
hci_dev_unlock(hdev);
}
+int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
+ bool use_rpa, struct adv_info *adv_instance,
+ u8 *own_addr_type, bdaddr_t *rand_addr)
+{
+ int err;
+
+ bacpy(rand_addr, BDADDR_ANY);
+
+ /* If privacy is enabled use a resolvable private address. If
+ * current RPA has expired then generate a new one.
+ */
+ if (use_rpa) {
+ int to;
+
+ *own_addr_type = ADDR_LE_DEV_RANDOM;
+
+ if (adv_instance) {
+ if (!adv_instance->rpa_expired &&
+ !bacmp(&adv_instance->random_addr, &hdev->rpa))
+ return 0;
+
+ adv_instance->rpa_expired = false;
+ } else {
+ if (!hci_dev_test_and_clear_flag(hdev, HCI_RPA_EXPIRED) &&
+ !bacmp(&hdev->random_addr, &hdev->rpa))
+ return 0;
+ }
+
+ err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
+ if (err < 0) {
+ BT_ERR("%s failed to generate new RPA", hdev->name);
+ return err;
+ }
+
+ bacpy(rand_addr, &hdev->rpa);
+
+ to = msecs_to_jiffies(hdev->rpa_timeout * 1000);
+ if (adv_instance)
+ queue_delayed_work(hdev->workqueue,
+ &adv_instance->rpa_expired_cb, to);
+ else
+ queue_delayed_work(hdev->workqueue,
+ &hdev->rpa_expired, to);
+
+ return 0;
+ }
+
+ /* In case of required privacy without resolvable private address,
+ * use an non-resolvable private address. This is useful for
+ * non-connectable advertising.
+ */
+ if (require_privacy) {
+ bdaddr_t nrpa;
+
+ while (true) {
+ /* The non-resolvable private address is generated
+ * from random six bytes with the two most significant
+ * bits cleared.
+ */
+ get_random_bytes(&nrpa, 6);
+ nrpa.b[5] &= 0x3f;
+
+ /* The non-resolvable private address shall not be
+ * equal to the public address.
+ */
+ if (bacmp(&hdev->bdaddr, &nrpa))
+ break;
+ }
+
+ *own_addr_type = ADDR_LE_DEV_RANDOM;
+ bacpy(rand_addr, &nrpa);
+
+ return 0;
+ }
+
+ /* No privacy so use a public address. */
+ *own_addr_type = ADDR_LE_DEV_PUBLIC;
+
+ return 0;
+}
+
void __hci_req_clear_ext_adv_sets(struct hci_request *req)
{
hci_req_add(req, HCI_OP_LE_CLEAR_ADV_SETS, 0, NULL);
struct hci_dev *hdev = req->hdev;
bool connectable;
u32 flags;
+ bdaddr_t random_addr;
+ u8 own_addr_type;
+ int err;
+ struct adv_info *adv_instance;
/* In ext adv set param interval is 3 octets */
const u8 adv_interval[3] = { 0x00, 0x08, 0x00 };
+ if (instance > 0) {
+ adv_instance = hci_find_adv_instance(hdev, instance);
+ if (!adv_instance)
+ return -EINVAL;
+ } else {
+ adv_instance = NULL;
+ }
+
flags = get_adv_instance_flags(hdev, instance);
/* If the "connectable" instance flag was not set, then choose between
if (!is_advertising_allowed(hdev, connectable))
return -EPERM;
+ /* Set require_privacy to true only when non-connectable
+ * advertising is used. In that case it is fine to use a
+ * non-resolvable private address.
+ */
+ err = hci_get_random_address(hdev, !connectable,
+ adv_use_rpa(hdev, flags), adv_instance,
+ &own_addr_type, &random_addr);
+ if (err < 0)
+ return err;
+
memset(&cp, 0, sizeof(cp));
memcpy(cp.min_interval, adv_interval, sizeof(cp.min_interval));
else
cp.evt_properties = cpu_to_le16(LE_LEGACY_NONCONN_IND);
- cp.own_addr_type = BDADDR_LE_PUBLIC;
+ cp.own_addr_type = own_addr_type;
cp.channel_map = hdev->le_adv_channel_map;
cp.tx_power = 127;
cp.primary_phy = HCI_ADV_PHY_1M;
hci_req_add(req, HCI_OP_LE_SET_EXT_ADV_PARAMS, sizeof(cp), &cp);
+ if (own_addr_type == ADDR_LE_DEV_RANDOM &&
+ bacmp(&random_addr, BDADDR_ANY)) {
+ struct hci_cp_le_set_adv_set_rand_addr cp;
+
+ /* Check if random address need to be updated */
+ if (adv_instance) {
+ if (!bacmp(&random_addr, &adv_instance->random_addr))
+ return 0;
+ } else {
+ if (!bacmp(&random_addr, &hdev->random_addr))
+ return 0;
+ }
+
+ memset(&cp, 0, sizeof(cp));
+
+ cp.handle = 0;
+ bacpy(&cp.bdaddr, &random_addr);
+
+ hci_req_add(req,
+ HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
+ sizeof(cp), &cp);
+ }
+
return 0;
}
int __hci_req_start_ext_adv(struct hci_request *req, u8 instance);
void __hci_req_enable_ext_advertising(struct hci_request *req);
void __hci_req_clear_ext_adv_sets(struct hci_request *req);
+int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
+ bool use_rpa, struct adv_info *adv_instance,
+ u8 *own_addr_type, bdaddr_t *rand_addr);
void __hci_req_update_class(struct hci_request *req);
changed = !hci_dev_test_and_set_flag(hdev, HCI_PRIVACY);
memcpy(hdev->irk, cp->irk, sizeof(hdev->irk));
hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
+ hci_adv_instances_set_rpa_expired(hdev, true);
if (cp->privacy == 0x02)
hci_dev_set_flag(hdev, HCI_LIMITED_PRIVACY);
else
changed = hci_dev_test_and_clear_flag(hdev, HCI_PRIVACY);
memset(hdev->irk, 0, sizeof(hdev->irk));
hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED);
+ hci_adv_instances_set_rpa_expired(hdev, false);
hci_dev_clear_flag(hdev, HCI_LIMITED_PRIVACY);
}
projects / linux.git / commitdiff