From: Jefferson Delfes <jefferson.delfes@xxxxxxxxxxxxx>
Unset controller data allows user to remove some data previously set to be
advertised via set controller data MGMT command.
If LE_ENABLED is set, the HCI_OP_LE_SET_ADV_DATA command will be sent.
This command is available on the powered off state.
Signed-off-by: Aloisio Almeida Jr <aloisio.almeida@xxxxxxxxxxxxx>
---
include/net/bluetooth/hci_core.h | 1 +
include/net/bluetooth/mgmt.h | 6 ++++++
net/bluetooth/hci_core.c | 19 +++++++++++++++++++
net/bluetooth/mgmt.c | 22 ++++++++++++++++++++++
4 files changed, 48 insertions(+)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 4046111..d5d4dc4 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -761,6 +761,7 @@ void hci_conn_del_sysfs(struct hci_conn *conn);
int hci_controller_data_add(struct hci_dev *hdev, u8 flags, u8 type, u8 length,
u8 *data);
int hci_controller_data_clear(struct hci_dev *hdev);
+int hci_controller_data_remove(struct hci_dev *hdev, u8 type);
#define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index f99e0a8..bbb4b4a 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -359,6 +359,12 @@ struct mgmt_cp_set_controller_data {
} __packed;
#define MGMT_SET_CONTROLLER_DATA_SIZE 3
+#define MGMT_OP_UNSET_CONTROLLER_DATA 0x002A
+struct mgmt_cp_unset_controller_data {
+ __u8 type;
+} __packed;
+#define MGMT_UNSET_CONTROLLER_DATA_SIZE 1
+
#define MGMT_EV_CMD_COMPLETE 0x0001
struct mgmt_ev_cmd_complete {
__le16 opcode;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index e5ab961..2c2f3aa 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1439,6 +1439,25 @@ int hci_controller_data_clear(struct hci_dev *hdev)
return 0;
}
+int hci_controller_data_remove(struct hci_dev *hdev, u8 type)
+{
+ struct controller_data *match, *n;
+ int matches = 0;
+
+ list_for_each_entry_safe(match, n, &hdev->controller_data, list) {
+ if (type != match->type)
+ continue;
+
+ list_del(&match->list);
+ hdev->adv_data_len -= sizeof(match->length) +
+ sizeof(match->type) + match->length;
+ kfree(match);
+ matches++;
+ }
+
+ return matches;
+}
+
struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
{
struct bdaddr_list *b;
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 1ada019..a094ef3 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -2755,6 +2755,27 @@ static int set_controller_data(struct sock *sk, struct hci_dev *hdev,
0);
}
+static int unset_controller_data(struct sock *sk, struct hci_dev *hdev,
+ void *data, u16 len)
+{
+ struct mgmt_cp_unset_controller_data *cp = data;
+ int removed;
+
+ BT_DBG("%s type:0x%02x", hdev->name, cp->type);
+
+ hci_dev_lock(hdev);
+
+ removed = hci_controller_data_remove(hdev, cp->type);
+
+ if (removed && test_bit(HCI_LE_ENABLED, &hdev->dev_flags))
+ update_adv_data(hdev);
+
+ hci_dev_unlock(hdev);
+
+ return cmd_complete(sk, hdev->id, MGMT_OP_UNSET_CONTROLLER_DATA, 0,
+ NULL, 0);
+}
+
static const struct mgmt_handler {
int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
u16 data_len);
@@ -2803,6 +2824,7 @@ static const struct mgmt_handler {
{ unblock_device, false, MGMT_UNBLOCK_DEVICE_SIZE },
{ set_device_id, false, MGMT_SET_DEVICE_ID_SIZE },
{ set_controller_data, true, MGMT_SET_CONTROLLER_DATA_SIZE },
+ { unset_controller_data, false, MGMT_UNSET_CONTROLLER_DATA_SIZE },
};
--
1.7.10.4
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