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authorŁukasz Rymanowski <lukasz.rymanowski@codecoup.pl>2017-12-08 13:40:57 +0100
committerMarcel Holtmann <marcel@holtmann.org>2017-12-13 09:41:37 +0100
commit9e1e9f20ca96026c56ac613317ea4bf01c6c3385 (patch)
tree56117e225b5e1ecea03a1158131da87f5278b8df
parent4166493c97c0c70e8d7678422c2214dc5ec6e9d3 (diff)
Bluetooth: Add support to advertise when connected
So far, kernel did not allow to advertise when there was a connection established. With this patch kernel does allow it if controller supports it. If controller supports non-connectable advertising when connected, then only non-connectable advertising instances will be advertised. Signed-off-by: Łukasz Rymanowski <lukasz.rymanowski@codecoup.pl> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
-rw-r--r--net/bluetooth/hci_request.c55
1 files changed, 46 insertions, 9 deletions
diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index da59f82754bc..3394e6791673 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -919,6 +919,43 @@ static bool adv_use_rpa(struct hci_dev *hdev, uint32_t flags)
return true;
}
+static bool is_advertising_allowed(struct hci_dev *hdev, bool connectable)
+{
+ /* If there is no connection we are OK to advertise. */
+ if (hci_conn_num(hdev, LE_LINK) == 0)
+ return true;
+
+ /* Check le_states if there is any connection in slave role. */
+ if (hdev->conn_hash.le_num_slave > 0) {
+ /* Slave connection state and non connectable mode bit 20. */
+ if (!connectable && !(hdev->le_states[2] & 0x10))
+ return false;
+
+ /* Slave connection state and connectable mode bit 38
+ * and scannable bit 21.
+ */
+ if (connectable && (!(hdev->le_states[4] & 0x01) ||
+ !(hdev->le_states[2] & 0x40)))
+ return false;
+ }
+
+ /* Check le_states if there is any connection in master role. */
+ if (hci_conn_num(hdev, LE_LINK) != hdev->conn_hash.le_num_slave) {
+ /* Master connection state and non connectable mode bit 18. */
+ if (!connectable && !(hdev->le_states[2] & 0x02))
+ return false;
+
+ /* Master connection state and connectable mode bit 35 and
+ * scannable 19.
+ */
+ if (connectable && (!(hdev->le_states[4] & 0x10) ||
+ !(hdev->le_states[2] & 0x08)))
+ return false;
+ }
+
+ return true;
+}
+
void __hci_req_enable_advertising(struct hci_request *req)
{
struct hci_dev *hdev = req->hdev;
@@ -927,7 +964,15 @@ void __hci_req_enable_advertising(struct hci_request *req)
bool connectable;
u32 flags;
- if (hci_conn_num(hdev, LE_LINK) > 0)
+ flags = get_adv_instance_flags(hdev, hdev->cur_adv_instance);
+
+ /* If the "connectable" instance flag was not set, then choose between
+ * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
+ */
+ connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
+ mgmt_get_connectable(hdev);
+
+ if (!is_advertising_allowed(hdev, connectable))
return;
if (hci_dev_test_flag(hdev, HCI_LE_ADV))
@@ -940,14 +985,6 @@ void __hci_req_enable_advertising(struct hci_request *req)
*/
hci_dev_clear_flag(hdev, HCI_LE_ADV);
- flags = get_adv_instance_flags(hdev, hdev->cur_adv_instance);
-
- /* If the "connectable" instance flag was not set, then choose between
- * ADV_IND and ADV_NONCONN_IND based on the global connectable setting.
- */
- connectable = (flags & MGMT_ADV_FLAG_CONNECTABLE) ||
- mgmt_get_connectable(hdev);
-
/* 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.

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