Bluetooth: Support the "discoverable" adv flag

This patch adds support for the "discoverable" flag of the
Add Advertising command.

Signed-off-by: Arman Uguray <armansito@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 672ff5b..c180452 100644 (file)
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -975,13 +975,28 @@ static u8 create_default_adv_data(struct hci_dev *hdev, u8 *ptr)
 
 static u8 create_instance_adv_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.
-        */
+       u8 ad_len = 0, flags = 0;
+
+       if (hdev->adv_instance.flags & MGMT_ADV_FLAG_DISCOV)
+               flags |= LE_AD_GENERAL;
+
+       if (flags) {
+               if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+                       flags |= LE_AD_NO_BREDR;
+
+               ptr[0] = 0x02;
+               ptr[1] = EIR_FLAGS;
+               ptr[2] = flags;
+
+               ad_len += 3;
+               ptr += 3;
+       }
+
        memcpy(ptr, hdev->adv_instance.adv_data,
               hdev->adv_instance.adv_data_len);
+       ad_len += hdev->adv_instance.adv_data_len;
 
-       return hdev->adv_instance.adv_data_len;
+       return ad_len;
 }
 
 static void update_adv_data_for_instance(struct hci_request *req, u8 instance)
@@ -6556,12 +6571,16 @@ static int read_adv_features(struct sock *sk, struct hci_dev *hdev,
 }
 
 static bool tlv_data_is_valid(struct hci_dev *hdev, u32 adv_flags, u8 *data,
-                             u8 len)
+                             u8 len, bool is_adv_data)
 {
        u8 max_len = HCI_MAX_AD_LENGTH;
        int i, cur_len;
+       bool flags_managed = false;
 
-       /* TODO: Correctly reduce len based on adv_flags. */
+       if (is_adv_data && (adv_flags & MGMT_ADV_FLAG_DISCOV)) {
+               flags_managed = true;
+               max_len -= 3;
+       }
 
        if (len > max_len)
                return false;
@@ -6570,6 +6589,9 @@ static bool tlv_data_is_valid(struct hci_dev *hdev, u32 adv_flags, u8 *data,
        for (i = 0, cur_len = 0; i < len; i += (cur_len + 1)) {
                cur_len = data[i];
 
+               if (flags_managed && data[i + 1] == EIR_FLAGS)
+                       return false;
+
                /* If the current field length would exceed the total data
                 * length, then it's invalid.
                 */
@@ -6671,9 +6693,9 @@ static int add_advertising(struct sock *sk, struct hci_dev *hdev,
                goto unlock;
        }
 
-       if (!tlv_data_is_valid(hdev, flags, cp->data, cp->adv_data_len) ||
+       if (!tlv_data_is_valid(hdev, flags, cp->data, cp->adv_data_len, true) ||
            !tlv_data_is_valid(hdev, flags, cp->data + cp->adv_data_len,
-                              cp->scan_rsp_len)) {
+                              cp->scan_rsp_len, false)) {
                err = mgmt_cmd_status(sk, hdev->id, MGMT_OP_ADD_ADVERTISING,
                                      MGMT_STATUS_INVALID_PARAMS);
                goto unlock;