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Bluetooth: Introduce a whitelist for BR/EDR devices

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This patch extends the Add/Remove device commands by letting user space
pass BR/EDR addresses to them. The resulting entries get stored in a new
hdev->whitelist list. The idea is that we can now selectively accept
connections from devices in the list even though HCI_CONNECTABLE is not
set (the actual implementation of this is coming in a subsequent patch).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2014-07-09 12:59:14 +03:00 committed by Marcel Holtmann
parent dcc36c16c2
commit 6659358efe
3 changed files with 74 additions and 2 deletions
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1
include/net/bluetooth/hci_core.h
View File

@ -305,6 +305,7 @@ struct hci_dev {
struct list_head mgmt_pending;
struct list_head blacklist;
struct list_head whitelist;
struct list_head uuids;
struct list_head link_keys;
struct list_head long_term_keys;

29
net/bluetooth/hci_core.c
View File

@ -191,6 +191,31 @@ static const struct file_operations blacklist_fops = {
.release = single_release,
};
static int whitelist_show(struct seq_file *f, void *p)
{
struct hci_dev *hdev = f->private;
struct bdaddr_list *b;
hci_dev_lock(hdev);
list_for_each_entry(b, &hdev->whitelist, list)
seq_printf(f, "%pMR (type %u)\n", &b->bdaddr, b->bdaddr_type);
hci_dev_unlock(hdev);
return 0;
}
static int whitelist_open(struct inode *inode, struct file *file)
{
return single_open(file, whitelist_show, inode->i_private);
}
static const struct file_operations whitelist_fops = {
.open = whitelist_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int uuids_show(struct seq_file *f, void *p)
{
struct hci_dev *hdev = f->private;
@ -1707,6 +1732,8 @@ static int __hci_init(struct hci_dev *hdev)
debugfs_create_u16("hci_revision", 0444, hdev->debugfs, &hdev->hci_rev);
debugfs_create_file("blacklist", 0444, hdev->debugfs, hdev,
&blacklist_fops);
debugfs_create_file("whitelist", 0444, hdev->debugfs, hdev,
&whitelist_fops);
debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops);
debugfs_create_file("conn_info_min_age", 0644, hdev->debugfs, hdev,
@ -3825,6 +3852,7 @@ struct hci_dev *hci_alloc_dev(void)
INIT_LIST_HEAD(&hdev->mgmt_pending);
INIT_LIST_HEAD(&hdev->blacklist);
INIT_LIST_HEAD(&hdev->whitelist);
INIT_LIST_HEAD(&hdev->uuids);
INIT_LIST_HEAD(&hdev->link_keys);
INIT_LIST_HEAD(&hdev->long_term_keys);
@ -4036,6 +4064,7 @@ void hci_unregister_dev(struct hci_dev *hdev)
hci_dev_lock(hdev);
hci_bdaddr_list_clear(&hdev->blacklist);
hci_bdaddr_list_clear(&hdev->whitelist);
hci_uuids_clear(hdev);
hci_link_keys_clear(hdev);
hci_smp_ltks_clear(hdev);

46
net/bluetooth/mgmt.c
View File

@ -5219,7 +5219,7 @@ static int add_device(struct sock *sk, struct hci_dev *hdev,
BT_DBG("%s", hdev->name);
if (!bdaddr_type_is_le(cp->addr.type) ||
if (!bdaddr_type_is_valid(cp->addr.type) ||
!bacmp(&cp->addr.bdaddr, BDADDR_ANY))
return cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,
MGMT_STATUS_INVALID_PARAMS,
@ -5232,6 +5232,22 @@ static int add_device(struct sock *sk, struct hci_dev *hdev,
hci_dev_lock(hdev);
if (cp->addr.type == BDADDR_BREDR) {
/* Only "connect" action supported for now */
if (cp->action != 0x01) {
err = cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,
MGMT_STATUS_INVALID_PARAMS,
&cp->addr, sizeof(cp->addr));
goto unlock;
}
err = hci_bdaddr_list_add(&hdev->whitelist, &cp->addr.bdaddr,
cp->addr.type);
if (err)
goto unlock;
goto added;
}
if (cp->addr.type == BDADDR_LE_PUBLIC)
addr_type = ADDR_LE_DEV_PUBLIC;
else
@ -5253,6 +5269,7 @@ static int add_device(struct sock *sk, struct hci_dev *hdev,
goto unlock;
}
added:
device_added(sk, hdev, &cp->addr.bdaddr, cp->addr.type, cp->action);
err = cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,
@ -5288,13 +5305,30 @@ static int remove_device(struct sock *sk, struct hci_dev *hdev,
struct hci_conn_params *params;
u8 addr_type;
if (!bdaddr_type_is_le(cp->addr.type)) {
if (!bdaddr_type_is_valid(cp->addr.type)) {
err = cmd_complete(sk, hdev->id, MGMT_OP_REMOVE_DEVICE,
MGMT_STATUS_INVALID_PARAMS,
&cp->addr, sizeof(cp->addr));
goto unlock;
}
if (cp->addr.type == BDADDR_BREDR) {
err = hci_bdaddr_list_del(&hdev->whitelist,
&cp->addr.bdaddr,
cp->addr.type);
if (err) {
err = cmd_complete(sk, hdev->id,
MGMT_OP_REMOVE_DEVICE,
MGMT_STATUS_INVALID_PARAMS,
&cp->addr, sizeof(cp->addr));
goto unlock;
}
device_removed(sk, hdev, &cp->addr.bdaddr,
cp->addr.type);
goto complete;
}
if (cp->addr.type == BDADDR_LE_PUBLIC)
addr_type = ADDR_LE_DEV_PUBLIC;
else
@ -5324,6 +5358,7 @@ static int remove_device(struct sock *sk, struct hci_dev *hdev,
device_removed(sk, hdev, &cp->addr.bdaddr, cp->addr.type);
} else {
struct hci_conn_params *p, *tmp;
struct bdaddr_list *b, *btmp;
if (cp->addr.type) {
err = cmd_complete(sk, hdev->id, MGMT_OP_REMOVE_DEVICE,
@ -5332,6 +5367,12 @@ static int remove_device(struct sock *sk, struct hci_dev *hdev,
goto unlock;
}
list_for_each_entry_safe(b, btmp, &hdev->whitelist, list) {
device_removed(sk, hdev, &b->bdaddr, b->bdaddr_type);
list_del(&b->list);
kfree(b);
}
list_for_each_entry_safe(p, tmp, &hdev->le_conn_params, list) {
if (p->auto_connect == HCI_AUTO_CONN_DISABLED)
continue;
@ -5346,6 +5387,7 @@ static int remove_device(struct sock *sk, struct hci_dev *hdev,
hci_update_background_scan(hdev);
}
complete:
err = cmd_complete(sk, hdev->id, MGMT_OP_REMOVE_DEVICE,
MGMT_STATUS_SUCCESS, &cp->addr, sizeof(cp->addr));