Bluetooth: Support the "tx-power" adv flag

This patch adds support for the "tx-power" flag of the Add
Advertising command.

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

1 files changed, 19 insertions, 0 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index cc4e76f8be0e..de321b9087e7 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1004,6 +1004,16 @@ static u8 create_instance_adv_data(struct hci_dev *hdev, u8 *ptr)
                 ptr += 3;
         }
 
+        if (hdev->adv_tx_power != HCI_TX_POWER_INVALID &&
+            (hdev->adv_instance.flags & MGMT_ADV_FLAG_TX_POWER)) {
+                ptr[0] = 0x02;
+                ptr[1] = EIR_TX_POWER;
+                ptr[2] = (u8)hdev->adv_tx_power;
+
+                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;
@@ -6588,6 +6598,7 @@ static bool tlv_data_is_valid(struct hci_dev *hdev, u32 adv_flags, u8 *data,
         u8 max_len = HCI_MAX_AD_LENGTH;
         int i, cur_len;
         bool flags_managed = false;
+        bool tx_power_managed = false;
         u32 flags_params = MGMT_ADV_FLAG_DISCOV | MGMT_ADV_FLAG_LIMITED_DISCOV |
                            MGMT_ADV_FLAG_MANAGED_FLAGS;
 
@@ -6596,6 +6607,11 @@ static bool tlv_data_is_valid(struct hci_dev *hdev, u32 adv_flags, u8 *data,
                 max_len -= 3;
         }
 
+        if (is_adv_data && (adv_flags & MGMT_ADV_FLAG_TX_POWER)) {
+                tx_power_managed = true;
+                max_len -= 3;
+        }
+
         if (len > max_len)
                 return false;
 
@@ -6606,6 +6622,9 @@ static bool tlv_data_is_valid(struct hci_dev *hdev, u32 adv_flags, u8 *data,
                 if (flags_managed && data[i + 1] == EIR_FLAGS)
                         return false;
 
+                if (tx_power_managed && data[i + 1] == EIR_TX_POWER)
+                        return false;
+
                 /* If the current field length would exceed the total data
                  * length, then it's invalid.
                  */