This patch implements setting the Scan Response data provided as part
of an advertising instance through the Add Advertising command.
Signed-off-by: Arman Uguray <armansito@xxxxxxxxxxxx>
---
net/bluetooth/mgmt.c | 66 +++++++++++++++++++++++++++++++++++++++++-----------
1 file changed, 52 insertions(+), 14 deletions(-)
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 5e5a738..762ca9b 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -793,7 +793,7 @@ static struct mgmt_pending_cmd *pending_find_data(u16 opcode,
return mgmt_pending_find_data(HCI_CHANNEL_CONTROL, opcode, hdev, data);
}
-static u8 create_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
+static u8 create_default_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
{
u8 ad_len = 0;
size_t name_len;
@@ -819,7 +819,19 @@ static u8 create_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
return ad_len;
}
-static void update_scan_rsp_data(struct hci_request *req)
+static u8 create_instance_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
+{
+ /* TODO: Set the appropriate entries based on advertising instance flags
+ * here once flags other than 0 are supported.
+ */
+ memcpy(ptr, hdev->adv_instance.scan_rsp_data,
+ hdev->adv_instance.scan_rsp_len);
+
+ return hdev->adv_instance.scan_rsp_len;
+}
+
+static void update_scan_rsp_data_for_instance(struct hci_request *req,
+ u8 instance)
{
struct hci_dev *hdev = req->hdev;
struct hci_cp_le_set_scan_rsp_data cp;
@@ -830,10 +842,13 @@ static void update_scan_rsp_data(struct hci_request *req)
memset(&cp, 0, sizeof(cp));
- len = create_scan_rsp_data(hdev, cp.data);
+ if (instance)
+ len = create_instance_scan_rsp_data(hdev, cp.data);
+ else
+ len = create_default_scan_rsp_data(hdev, cp.data);
if (hdev->scan_rsp_data_len == len &&
- memcmp(cp.data, hdev->scan_rsp_data, len) == 0)
+ !memcmp(cp.data, hdev->scan_rsp_data, len))
return;
memcpy(hdev->scan_rsp_data, cp.data, sizeof(cp.data));
@@ -844,6 +859,25 @@ static void update_scan_rsp_data(struct hci_request *req)
hci_req_add(req, HCI_OP_LE_SET_SCAN_RSP_DATA, sizeof(cp), &cp);
}
+static void update_scan_rsp_data(struct hci_request *req)
+{
+ struct hci_dev *hdev = req->hdev;
+ u8 instance;
+
+ /* The "Set Advertising" setting supersedes the "Add Advertising"
+ * setting. Here we set the scan response data based on which
+ * setting was set. When neither apply, default to the global settings,
+ * represented by instance "0".
+ */
+ if (hci_dev_test_flag(hdev, HCI_ADVERTISING_INSTANCE) &&
+ !hci_dev_test_flag(hdev, HCI_ADVERTISING))
+ instance = 0x01;
+ else
+ instance = 0x00;
+
+ update_scan_rsp_data_for_instance(req, instance);
+}
+
static u8 get_adv_discov_flags(struct hci_dev *hdev)
{
struct mgmt_pending_cmd *cmd;
@@ -4547,6 +4581,7 @@ static int set_advertising(struct sock *sk, struct hci_dev *hdev, void *data,
if (val) {
/* Switch to instance "0" for the Set Advertising setting. */
update_adv_data_for_instance(&req, 0);
+ update_scan_rsp_data_for_instance(&req, 0);
enable_advertising(&req);
} else {
disable_advertising(&req);
@@ -6408,25 +6443,25 @@ static int read_adv_features(struct sock *sk, struct hci_dev *hdev,
return err;
}
-static bool adv_data_is_valid(struct hci_dev *hdev, u32 adv_flags, u8 *adv_data,
- u8 adv_data_len)
+static bool tlv_data_is_valid(struct hci_dev *hdev, u32 adv_flags, u8 *data,
+ u8 len)
{
- u8 max_adv_len = HCI_MAX_AD_LENGTH;
+ u8 max_len = HCI_MAX_AD_LENGTH;
int i, cur_len;
- /* TODO: Correctly reduce adv_len based on adv_flags. */
+ /* TODO: Correctly reduce len based on adv_flags. */
- if (adv_data_len > max_adv_len)
+ if (len > max_len)
return false;
- /* Make sure that adv_data is correctly formatted. */
- for (i = 0, cur_len = 0; i < adv_data_len; i += (cur_len + 1)) {
- cur_len = adv_data[i];
+ /* Make sure that the data is correctly formatted. */
+ for (i = 0, cur_len = 0; i < len; i += (cur_len + 1)) {
+ cur_len = data[i];
/* If the current field length would exceed the total data
* length, then it's invalid.
*/
- if (i + cur_len >= adv_data_len)
+ if (i + cur_len >= len)
return false;
}
@@ -6526,7 +6561,9 @@ static int add_advertising(struct sock *sk, struct hci_dev *hdev,
goto unlock;
}
- if (!adv_data_is_valid(hdev, flags, cp->data, cp->adv_data_len)) {
+ if (!tlv_data_is_valid(hdev, flags, cp->data, cp->adv_data_len) ||
+ !tlv_data_is_valid(hdev, flags, cp->data + cp->adv_data_len,
+ cp->scan_rsp_len)) {
err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
MGMT_STATUS_INVALID_PARAMS);
goto unlock;
@@ -6570,6 +6607,7 @@ static int add_advertising(struct sock *sk, struct hci_dev *hdev,
hci_req_init(&req, hdev);
update_adv_data(&req);
+ update_scan_rsp_data(&req);
enable_advertising(&req);
err = hci_req_run(&req, add_advertising_complete);
--
2.2.0.rc0.207.ga3a616c
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