Bluetooth: Set the scan response data when needed

On controller power on and when enabling LE functionality,
make sure that also the scan response data is correctly set.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 8b8c3e2..aca8944 100644 (file)
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -1094,6 +1094,12 @@ struct hci_cp_le_set_adv_data {
        __u8    data[HCI_MAX_AD_LENGTH];
 } __packed;
 
+#define HCI_OP_LE_SET_SCAN_RSP_DATA    0x2009
+struct hci_cp_le_set_scan_rsp_data {
+       __u8    length;
+       __u8    data[HCI_MAX_AD_LENGTH];
+} __packed;
+
 #define HCI_OP_LE_SET_ADV_ENABLE       0x200a
 
 #define LE_SCAN_PASSIVE                        0x00

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 54f1454..59bbf43 100644 (file)
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -536,6 +536,36 @@ static u8 *create_uuid128_list(struct hci_dev *hdev, u8 *data, ptrdiff_t len)
        return ptr;
 }
 
+static u8 create_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
+{
+       return 0;
+}
+
+static void update_scan_rsp_data(struct hci_request *req)
+{
+       struct hci_dev *hdev = req->hdev;
+       struct hci_cp_le_set_scan_rsp_data cp;
+       u8 len;
+
+       if (!lmp_le_capable(hdev))
+               return;
+
+       memset(&cp, 0, sizeof(cp));
+
+       len = create_scan_rsp_data(hdev, cp.data);
+
+       if (hdev->adv_data_len == len &&
+           memcmp(cp.data, hdev->adv_data, len) == 0)
+               return;
+
+       memcpy(hdev->adv_data, cp.data, sizeof(cp.data));
+       hdev->adv_data_len = len;
+
+       cp.length = len;
+
+       hci_req_add(req, HCI_OP_LE_SET_SCAN_RSP_DATA, sizeof(cp), &cp);
+}
+
 static u8 create_adv_data(struct hci_dev *hdev, u8 *ptr)
 {
        u8 ad_len = 0, flags = 0;
@@ -1715,6 +1745,7 @@ static void le_enable_complete(struct hci_dev *hdev, u8 status)
 
                hci_req_init(&req, hdev);
                update_ad(&req);
+               update_scan_rsp_data(&req);
                hci_req_run(&req, NULL);
 
                hci_dev_unlock(hdev);
@@ -3898,6 +3929,9 @@ static int set_bredr(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
        if (test_bit(HCI_CONNECTABLE, &hdev->dev_flags))
                set_bredr_scan(&req);
 
+       /* Since only the advertising data flags will change, there
+        * is no need to update the scan response data.
+        */
        update_ad(&req);
 
        err = hci_req_run(&req, set_bredr_complete);
@@ -4211,8 +4245,10 @@ static int powered_update_hci(struct hci_dev *hdev)
                 * advertising data. This also applies to the case
                 * where BR/EDR was toggled during the AUTO_OFF phase.
                 */
-               if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags))
+               if (test_bit(HCI_LE_ENABLED, &hdev->dev_flags)) {
                        update_ad(&req);
+                       update_scan_rsp_data(&req);
+               }
 
                if (test_bit(HCI_ADVERTISING, &hdev->dev_flags))
                        enable_advertising(&req);