Bluetooth: Add support for local name in scan rsp

This patch enables appending local name to scan response data. If
currently advertised instance has name flag set it is expired
immediately.

Signed-off-by: Michał Narajowski <michal.narajowski@codecoup.pl>
Signed-off-by: Szymon Janc <szymon.janc@codecoup.pl>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 20 insertions, 8 deletions

diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index 9566ff8e3223..0ce6cdd278b2 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -971,14 +971,14 @@ void __hci_req_enable_advertising(struct hci_request *req)
         hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable);
 }
 
-static u8 create_default_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
+static u8 append_local_name(struct hci_dev *hdev, u8 *ptr, u8 ad_len)
 {
-        u8 ad_len = 0;
         size_t name_len;
+        int max_len;
 
+        max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
         name_len = strlen(hdev->dev_name);
-        if (name_len > 0) {
-                size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
+        if (name_len > 0 && max_len > 0) {
 
                 if (name_len > max_len) {
                         name_len = max_len;
@@ -997,22 +997,34 @@ static u8 create_default_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
         return ad_len;
 }
 
+static u8 create_default_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
+{
+        return append_local_name(hdev, ptr, 0);
+}
+
 static u8 create_instance_scan_rsp_data(struct hci_dev *hdev, u8 instance,
                                         u8 *ptr)
 {
         struct adv_info *adv_instance;
+        u32 instance_flags;
+        u8 scan_rsp_len = 0;
 
         adv_instance = hci_find_adv_instance(hdev, instance);
         if (!adv_instance)
                 return 0;
 
-        /* TODO: Set the appropriate entries based on advertising instance flags
-         * here once flags other than 0 are supported.
-         */
+        instance_flags = adv_instance->flags;
+
         memcpy(ptr, adv_instance->scan_rsp_data,
                adv_instance->scan_rsp_len);
 
-        return adv_instance->scan_rsp_len;
+        scan_rsp_len += adv_instance->scan_rsp_len;
+        ptr += adv_instance->scan_rsp_len;
+
+        if (instance_flags & MGMT_ADV_FLAG_LOCAL_NAME)
+                scan_rsp_len = append_local_name(hdev, ptr, scan_rsp_len);
+
+        return scan_rsp_len;
 }
 
 void __hci_req_update_scan_rsp_data(struct hci_request *req, u8 instance)