From: Johan Hedberg <johan.hedberg@xxxxxxxxx>
This patch introduces a new mgmt command for enabling/disabling BR/EDR
functionality. This can be convenient when one wants to make a dual-mode
controller behave like a single-mode one. The command is only available
for dual-mode controllers and requires that LE is enabled before using
it. The BR/EDR setting can be enabled at any point, however disabling it
requires the controller to be powered off (otherwise a "rejected"
response will be sent).
Disabling the BR/EDR setting will automatically disable all other BR/EDR
related settings.
Signed-off-by: Johan Hedberg <johan.hedberg@xxxxxxxxx>
---
include/net/bluetooth/mgmt.h | 2 +
net/bluetooth/hci_event.c | 5 ++
net/bluetooth/mgmt.c | 120 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 127 insertions(+)
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index 421d763..7347df8 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -354,6 +354,8 @@ struct mgmt_cp_set_device_id {
#define MGMT_OP_SET_ADVERTISING 0x0029
+#define MGMT_OP_SET_BREDR 0x002A
+
#define MGMT_EV_CMD_COMPLETE 0x0001
struct mgmt_ev_cmd_complete {
__le16 opcode;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index d171c04b..4785ab0 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -297,6 +297,11 @@ static void hci_cc_write_scan_enable(struct hci_dev *hdev, struct sk_buff *skb)
goto done;
}
+ /* We need to ensure that we set this back on if someone changed
+ * the scan mode through a raw HCI socket.
+ */
+ set_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
+
old_pscan = test_and_clear_bit(HCI_PSCAN, &hdev->flags);
old_iscan = test_and_clear_bit(HCI_ISCAN, &hdev->flags);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 04d0f5a..4ac3169 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -75,6 +75,7 @@ static const u16 mgmt_commands[] = {
MGMT_OP_UNBLOCK_DEVICE,
MGMT_OP_SET_DEVICE_ID,
MGMT_OP_SET_ADVERTISING,
+ MGMT_OP_SET_BREDR,
};
static const u16 mgmt_events[] = {
@@ -3344,6 +3345,121 @@ unlock:
return err;
}
+static void set_bredr_complete(struct hci_dev *hdev, u8 status)
+{
+ struct pending_cmd *cmd;
+
+ BT_DBG("status 0x%02x", status);
+
+ hci_dev_lock(hdev);
+
+ cmd = mgmt_pending_find(MGMT_OP_SET_BREDR, hdev);
+ if (!cmd)
+ goto unlock;
+
+ if (status) {
+ u8 mgmt_err = mgmt_status(status);
+
+ /* We need to restore the flag if related HCI commands
+ * failed.
+ */
+ clear_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
+
+ cmd_status(cmd->sk, cmd->index, cmd->opcode, mgmt_err);
+ } else {
+ send_settings_rsp(cmd->sk, MGMT_OP_SET_BREDR, hdev);
+ new_settings(hdev, cmd->sk);
+ }
+
+ mgmt_pending_remove(cmd);
+
+unlock:
+ hci_dev_unlock(hdev);
+}
+
+static int set_bredr(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
+{
+ struct mgmt_mode *cp = data;
+ struct pending_cmd *cmd;
+ struct hci_request req;
+ int err;
+
+ BT_DBG("request for %s", hdev->name);
+
+ if (!lmp_bredr_capable(hdev) || !lmp_le_capable(hdev))
+ return cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
+ MGMT_STATUS_NOT_SUPPORTED);
+
+ if (!test_bit(HCI_LE_ENABLED, &hdev->dev_flags))
+ return cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
+ MGMT_STATUS_REJECTED);
+
+ if (cp->val != 0x00 && cp->val != 0x01)
+ return cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
+ MGMT_STATUS_INVALID_PARAMS);
+
+ hci_dev_lock(hdev);
+
+ if (cp->val == test_bit(HCI_BREDR_ENABLED, &hdev->dev_flags)) {
+ err = send_settings_rsp(sk, MGMT_OP_SET_BREDR, hdev);
+ goto unlock;
+ }
+
+ if (!hdev_is_powered(hdev)) {
+ if (!cp->val) {
+ clear_bit(HCI_CONNECTABLE, &hdev->dev_flags);
+ clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
+ clear_bit(HCI_SSP_ENABLED, &hdev->dev_flags);
+ clear_bit(HCI_LINK_SECURITY, &hdev->dev_flags);
+ clear_bit(HCI_FAST_CONNECTABLE, &hdev->dev_flags);
+ clear_bit(HCI_HS_ENABLED, &hdev->dev_flags);
+ }
+
+ change_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
+
+ err = send_settings_rsp(sk, MGMT_OP_SET_BREDR, hdev);
+ if (err < 0)
+ goto unlock;
+
+ err = new_settings(hdev, sk);
+ goto unlock;
+ }
+
+ /* Reject disabling when powered on */
+ if (!cp->val) {
+ err = cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
+ MGMT_STATUS_REJECTED);
+ goto unlock;
+ }
+
+ if (mgmt_pending_find(MGMT_OP_SET_BREDR, hdev)) {
+ err = cmd_status(sk, hdev->id, MGMT_OP_SET_BREDR,
+ MGMT_STATUS_BUSY);
+ goto unlock;
+ }
+
+ cmd = mgmt_pending_add(sk, MGMT_OP_SET_BREDR, hdev, data, len);
+ if (!cmd) {
+ err = -ENOMEM;
+ goto unlock;
+ }
+
+ /* We need to flip the bit already here so that hci_update_ad
+ * generates the correct flags.
+ */
+ set_bit(HCI_BREDR_ENABLED, &hdev->dev_flags);
+
+ hci_req_init(&req, hdev);
+ hci_update_ad(&req);
+ err = hci_req_run(&req, set_bredr_complete);
+ if (err < 0)
+ mgmt_pending_remove(cmd);
+
+unlock:
+ hci_dev_unlock(hdev);
+ return err;
+}
+
static bool ltk_is_valid(struct mgmt_ltk_info *key)
{
if (key->authenticated != 0x00 && key->authenticated != 0x01)
@@ -3459,6 +3575,7 @@ static const struct mgmt_handler {
{ unblock_device, false, MGMT_UNBLOCK_DEVICE_SIZE },
{ set_device_id, false, MGMT_SET_DEVICE_ID_SIZE },
{ set_advertising, false, MGMT_SETTING_SIZE },
+ { set_bredr, false, MGMT_SETTING_SIZE },
};
@@ -3640,6 +3757,9 @@ static int powered_update_hci(struct hci_dev *hdev)
cp.simul != lmp_host_le_br_capable(hdev))
hci_req_add(&req, HCI_OP_WRITE_LE_HOST_SUPPORTED,
sizeof(cp), &cp);
+
+ /* In case BR/EDR was toggled during the AUTO_OFF phase */
+ hci_update_ad(&req);
}
if (test_bit(HCI_LE_PERIPHERAL, &hdev->dev_flags)) {
--
1.8.3.1
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