This patch simplifies the code paths for assembling the advertising data
used by advertising instances 0 and 1.
Signed-off-by: Arman Uguray <armansito@xxxxxxxxxxxx>
---
net/bluetooth/mgmt.c | 155 +++++++++++++++++++++------------------------------
1 file changed, 64 insertions(+), 91 deletions(-)
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 71d4130..5fc1ebf 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -941,52 +941,73 @@ static u8 get_adv_discov_flags(struct hci_dev *hdev)
return 0;
}
-static u8 create_default_adv_data(struct hci_dev *hdev, u8 *ptr)
+static u8 get_current_adv_instance(struct hci_dev *hdev)
{
- u8 ad_len = 0, flags = 0;
-
- flags |= get_adv_discov_flags(hdev);
+ /* The "Set Advertising" setting supersedes the "Add Advertising"
+ * setting. Here we set the advertising 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))
+ return 0x01;
- if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
- flags |= LE_AD_NO_BREDR;
+ return 0x00;
+}
- if (flags) {
- BT_DBG("adv flags 0x%02x", flags);
+static bool get_connectable(struct hci_dev *hdev)
+{
+ struct mgmt_pending_cmd *cmd;
- ptr[0] = 2;
- ptr[1] = EIR_FLAGS;
- ptr[2] = flags;
+ /* If there's a pending mgmt command the flag will not yet have
+ * it's final value, so check for this first.
+ */
+ cmd = pending_find(MGMT_OP_SET_CONNECTABLE, hdev);
+ if (cmd) {
+ struct mgmt_mode *cp = cmd->param;
- ad_len += 3;
- ptr += 3;
+ return cp->val;
}
- if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {
- ptr[0] = 2;
- ptr[1] = EIR_TX_POWER;
- ptr[2] = (u8) hdev->adv_tx_power;
+ return hci_dev_test_flag(hdev, HCI_CONNECTABLE);
+}
- ad_len += 3;
- ptr += 3;
- }
+static u32 get_adv_instance_flags(struct hci_dev *hdev, u8 instance)
+{
+ u32 flags;
- return ad_len;
+ if (instance > 0x01)
+ return 0;
+
+ if (instance == 0x01)
+ return hdev->adv_instance.flags;
+
+ /* Instance 0 always manages the "Tx Power" and "Flags" fields */
+ flags = MGMT_ADV_FLAG_TX_POWER | MGMT_ADV_FLAG_MANAGED_FLAGS;
+
+ /* For instance 0, assemble the flags from global settings */
+ if (hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE) ||
+ get_connectable(hdev))
+ flags |= MGMT_ADV_FLAG_CONNECTABLE;
+
+ return flags;
}
-static u8 create_instance_adv_data(struct hci_dev *hdev, u8 *ptr)
+static u8 create_instance_adv_data(struct hci_dev *hdev, u8 instance, u8 *ptr)
{
u8 ad_len = 0, flags = 0;
+ u32 instance_flags = get_adv_instance_flags(hdev, instance);
/* The Add Advertising command allows userspace to set both the general
* and limited discoverable flags.
*/
- if (hdev->adv_instance.flags & MGMT_ADV_FLAG_DISCOV)
+ if (instance_flags & MGMT_ADV_FLAG_DISCOV)
flags |= LE_AD_GENERAL;
- if (hdev->adv_instance.flags & MGMT_ADV_FLAG_LIMITED_DISCOV)
+ if (instance_flags & MGMT_ADV_FLAG_LIMITED_DISCOV)
flags |= LE_AD_LIMITED;
- if (flags || (hdev->adv_instance.flags & MGMT_ADV_FLAG_MANAGED_FLAGS)) {
+ if (flags || (instance_flags & MGMT_ADV_FLAG_MANAGED_FLAGS)) {
/* If a discovery flag wasn't provided, simply use the global
* settings.
*/
@@ -996,16 +1017,22 @@ static u8 create_instance_adv_data(struct hci_dev *hdev, u8 *ptr)
if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
flags |= LE_AD_NO_BREDR;
- ptr[0] = 0x02;
- ptr[1] = EIR_FLAGS;
- ptr[2] = flags;
+ /* If flags would still be empty, then there is no need to
+ * include the "Flags" AD field".
+ */
+ if (flags) {
+ ptr[0] = 0x02;
+ ptr[1] = EIR_FLAGS;
+ ptr[2] = flags;
- ad_len += 3;
- ptr += 3;
+ ad_len += 3;
+ ptr += 3;
+ }
}
+ /* Provide Tx Power only if we can provide a valid value for it */
if (hdev->adv_tx_power != HCI_TX_POWER_INVALID &&
- (hdev->adv_instance.flags & MGMT_ADV_FLAG_TX_POWER)) {
+ (instance_flags & MGMT_ADV_FLAG_TX_POWER)) {
ptr[0] = 0x02;
ptr[1] = EIR_TX_POWER;
ptr[2] = (u8)hdev->adv_tx_power;
@@ -1014,9 +1041,11 @@ static u8 create_instance_adv_data(struct hci_dev *hdev, u8 *ptr)
ptr += 3;
}
- memcpy(ptr, hdev->adv_instance.adv_data,
- hdev->adv_instance.adv_data_len);
- ad_len += hdev->adv_instance.adv_data_len;
+ if (instance) {
+ memcpy(ptr, hdev->adv_instance.adv_data,
+ hdev->adv_instance.adv_data_len);
+ ad_len += hdev->adv_instance.adv_data_len;
+ }
return ad_len;
}
@@ -1032,10 +1061,7 @@ static void update_adv_data_for_instance(struct hci_request *req, u8 instance)
memset(&cp, 0, sizeof(cp));
- if (instance)
- len = create_instance_adv_data(hdev, cp.data);
- else
- len = create_default_adv_data(hdev, cp.data);
+ len = create_instance_adv_data(hdev, instance, cp.data);
/* There's nothing to do if the data hasn't changed */
if (hdev->adv_data_len == len &&
@@ -1050,59 +1076,6 @@ static void update_adv_data_for_instance(struct hci_request *req, u8 instance)
hci_req_add(req, HCI_OP_LE_SET_ADV_DATA, sizeof(cp), &cp);
}
-static u8 get_current_adv_instance(struct hci_dev *hdev)
-{
- /* The "Set Advertising" setting supersedes the "Add Advertising"
- * setting. Here we set the advertising 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))
- return 0x01;
-
- return 0x00;
-}
-
-static bool get_connectable(struct hci_dev *hdev)
-{
- struct mgmt_pending_cmd *cmd;
-
- /* If there's a pending mgmt command the flag will not yet have
- * it's final value, so check for this first.
- */
- cmd = pending_find(MGMT_OP_SET_CONNECTABLE, hdev);
- if (cmd) {
- struct mgmt_mode *cp = cmd->param;
-
- return cp->val;
- }
-
- return hci_dev_test_flag(hdev, HCI_CONNECTABLE);
-}
-
-static u32 get_adv_instance_flags(struct hci_dev *hdev, u8 instance)
-{
- u32 flags;
-
- if (instance > 0x01)
- return 0;
-
- if (instance == 1)
- return hdev->adv_instance.flags;
-
- flags = 0;
-
- /* For instance 0, assemble the flags from global settings */
- if (hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE) ||
- get_connectable(hdev))
- flags |= MGMT_ADV_FLAG_CONNECTABLE;
-
- /* TODO: Add the rest of the flags */
-
- return flags;
-}
-
static void update_adv_data(struct hci_request *req)
{
struct hci_dev *hdev = req->hdev;
--
2.2.0.rc0.207.ga3a616c
--
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