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Commit fdf51784 authored by Arman Uguray's avatar Arman Uguray Committed by Marcel Holtmann
Browse files

Bluetooth: Unify advertising data code paths 



This patch simplifies the code paths for assembling the advertising data
used by advertising instances 0 and 1.

Signed-off-by: default avatarArman Uguray <armansito@chromium.org>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 089fa8c0

net/bluetooth/mgmt.c

+64 −91
Original line number Diff line number Diff line
@@ -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;

	/* 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;



	flags |= get_adv_discov_flags(hdev);

	return 0x00;

}



	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))

		flags |= LE_AD_NO_BREDR;

static bool get_connectable(struct hci_dev *hdev)

{

	struct mgmt_pending_cmd *cmd;



	if (flags) {

		BT_DBG("adv flags 0x%02x", 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;



		ptr[0] = 2;

		ptr[1] = EIR_FLAGS;

		ptr[2] = flags;

		return cp->val;

	}



		ad_len += 3;

		ptr += 3;

	return hci_dev_test_flag(hdev, HCI_CONNECTABLE);

}



	if (hdev->adv_tx_power != HCI_TX_POWER_INVALID) {

		ptr[0] = 2;

		ptr[1] = EIR_TX_POWER;

		ptr[2] = (u8) hdev->adv_tx_power;

static u32 get_adv_instance_flags(struct hci_dev *hdev, u8 instance)

{

	u32 flags;



		ad_len += 3;

		ptr += 3;

	}

	if (instance > 0x01)

		return 0;



	return ad_len;

	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.

		 */
@@ -996,6 +1017,10 @@ 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;



		/* 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;
@@ -1003,9 +1028,11 @@ static u8 create_instance_adv_data(struct hci_dev *hdev, u8 *ptr) 
			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;

	}



	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;