2014-02-26 23:21:40

by Andre Guedes

Subject: [PATCH v2 01/17] Bluetooth: Create hci_req_add_le_scan_disable helper

This patch moves stop LE scanning duplicate code to one single
place and reuses it. This will avoid more duplicate code in
upcoming patches.

Signed-off-by: Andre Guedes <[email protected]>
---
include/net/bluetooth/hci_core.h | 2 ++
net/bluetooth/hci_core.c | 14 ++++++++++----
net/bluetooth/mgmt.c | 12 ++----------
3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 269c820..bef65d0 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1129,6 +1129,8 @@ void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
const void *param, u8 event);
void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status);

+void hci_req_add_le_scan_disable(struct hci_request *req);
+
struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
const void *param, u32 timeout);
struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 669c76e..9a078cf 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3318,7 +3318,6 @@ static void le_scan_disable_work(struct work_struct *work)
{
struct hci_dev *hdev = container_of(work, struct hci_dev,
le_scan_disable.work);
- struct hci_cp_le_set_scan_enable cp;
struct hci_request req;
int err;

@@ -3326,9 +3325,7 @@ static void le_scan_disable_work(struct work_struct *work)

hci_req_init(&req, hdev);

- memset(&cp, 0, sizeof(cp));
- cp.enable = LE_SCAN_DISABLE;
- hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
+ hci_req_add_le_scan_disable(&req);

err = hci_req_run(&req, le_scan_disable_work_complete);
if (err)
@@ -4872,3 +4869,12 @@ static void hci_cmd_work(struct work_struct *work)
}
}
}
+
+void hci_req_add_le_scan_disable(struct hci_request *req)
+{
+ struct hci_cp_le_set_scan_enable cp;
+
+ memset(&cp, 0, sizeof(cp));
+ cp.enable = LE_SCAN_DISABLE;
+ hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
+}
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index d6e2692..cfcaf97 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1052,11 +1052,7 @@ static int clean_up_hci_state(struct hci_dev *hdev)
disable_advertising(&req);

if (test_bit(HCI_LE_SCAN, &hdev->dev_flags)) {
- struct hci_cp_le_set_scan_enable cp;
-
- memset(&cp, 0, sizeof(cp));
- cp.enable = LE_SCAN_DISABLE;
- hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
+ hci_req_add_le_scan_disable(&req);
}

list_for_each_entry(conn, &hdev->conn_hash.list, list) {
@@ -3527,7 +3523,6 @@ static int stop_discovery(struct sock *sk, struct hci_dev *hdev, void *data,
struct hci_cp_remote_name_req_cancel cp;
struct inquiry_entry *e;
struct hci_request req;
- struct hci_cp_le_set_scan_enable enable_cp;
int err;

BT_DBG("%s", hdev->name);
@@ -3563,10 +3558,7 @@ static int stop_discovery(struct sock *sk, struct hci_dev *hdev, void *data,
} else {
cancel_delayed_work(&hdev->le_scan_disable);

- memset(&enable_cp, 0, sizeof(enable_cp));
- enable_cp.enable = LE_SCAN_DISABLE;
- hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE,
- sizeof(enable_cp), &enable_cp);
+ hci_req_add_le_scan_disable(&req);
}

break;
--
1.8.5.4

2014-02-27 03:44:45

by Marcel Holtmann

Subject: Re: [PATCH v2 17/17] Bluetooth: Update background scan parameters

Hi Andre,

> If new scanning parameters are set while background scan is running,
> we should restart background scanning so these parameters are updated.
>
> Signed-off-by: Andre Guedes <[email protected]>
> ---
> net/bluetooth/mgmt.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)

all 17 patches have been applied to bluetooth-next tree.

Regards

Marcel

2014-02-26 23:21:55

by Andre Guedes

Subject: [PATCH v2 16/17] Bluetooth: Create hci_req_add_le_passive_scan helper

This patches creates the public hci_req_add_le_passive_scan helper so
it can be re-used outside hci_core.c in the next patch.

Signed-off-by: Andre Guedes <[email protected]>
---
include/net/bluetooth/hci_core.h | 1 +
net/bluetooth/hci_core.c | 56 ++++++++++++++++++++++------------------
2 files changed, 32 insertions(+), 25 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 4b192d0..79a75ed 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1150,6 +1150,7 @@ void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status);

void hci_req_add_le_scan_disable(struct hci_request *req);
+void hci_req_add_le_passive_scan(struct hci_request *req);

struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
const void *param, u32 timeout);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 0b96f20..bbd085d 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -5115,6 +5115,36 @@ void hci_req_add_le_scan_disable(struct hci_request *req)
hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
}

+void hci_req_add_le_passive_scan(struct hci_request *req)
+{
+ struct hci_cp_le_set_scan_param param_cp;
+ struct hci_cp_le_set_scan_enable enable_cp;
+ struct hci_dev *hdev = req->hdev;
+ u8 own_addr_type;
+
+ /* Set require_privacy to true to avoid identification from
+ * unknown peer devices. Since this is passive scanning, no
+ * SCAN_REQ using the local identity should be sent. Mandating
+ * privacy is just an extra precaution.
+ */
+ if (hci_update_random_address(req, true, &own_addr_type))
+ return;
+
+ memset(&param_cp, 0, sizeof(param_cp));
+ param_cp.type = LE_SCAN_PASSIVE;
+ param_cp.interval = cpu_to_le16(hdev->le_scan_interval);
+ param_cp.window = cpu_to_le16(hdev->le_scan_window);
+ param_cp.own_address_type = own_addr_type;
+ hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
+ &param_cp);
+
+ memset(&enable_cp, 0, sizeof(enable_cp));
+ enable_cp.enable = LE_SCAN_ENABLE;
+ enable_cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
+ hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
+ &enable_cp);
+}
+
static void update_background_scan_complete(struct hci_dev *hdev, u8 status)
{
if (status)
@@ -5130,8 +5160,6 @@ static void update_background_scan_complete(struct hci_dev *hdev, u8 status)
*/
void hci_update_background_scan(struct hci_dev *hdev)
{
- struct hci_cp_le_set_scan_param param_cp;
- struct hci_cp_le_set_scan_enable enable_cp;
struct hci_request req;
struct hci_conn *conn;
int err;
@@ -5151,8 +5179,6 @@ void hci_update_background_scan(struct hci_dev *hdev)

BT_DBG("%s stopping background scanning", hdev->name);
} else {
- u8 own_addr_type;
-
/* If there is at least one pending LE connection, we should
* keep the background scan running.
*/
@@ -5169,27 +5195,7 @@ void hci_update_background_scan(struct hci_dev *hdev)
if (conn)
return;

- /* Set require_privacy to true to avoid identification from
- * unknown peer devices. Since this is passive scanning, no
- * SCAN_REQ using the local identity should be sent. Mandating
- * privacy is just an extra precaution.
- */
- if (hci_update_random_address(&req, true, &own_addr_type))
- return;
-
- memset(&param_cp, 0, sizeof(param_cp));
- param_cp.type = LE_SCAN_PASSIVE;
- param_cp.interval = cpu_to_le16(hdev->le_scan_interval);
- param_cp.window = cpu_to_le16(hdev->le_scan_window);
- param_cp.own_address_type = own_addr_type;
- hci_req_add(&req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
- &param_cp);
-
- memset(&enable_cp, 0, sizeof(enable_cp));
- enable_cp.enable = LE_SCAN_ENABLE;
- enable_cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
- hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
- &enable_cp);
+ hci_req_add_le_passive_scan(&req);

BT_DBG("%s starting background scanning", hdev->name);
}
--
1.8.5.4

2014-02-26 23:21:56

by Andre Guedes

Subject: [PATCH v2 17/17] Bluetooth: Update background scan parameters

If new scanning parameters are set while background scan is running,
we should restart background scanning so these parameters are updated.

Signed-off-by: Andre Guedes <[email protected]>
---
net/bluetooth/mgmt.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 2e6564e..4c4912e 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -3924,6 +3924,21 @@ static int set_scan_params(struct sock *sk, struct hci_dev *hdev,

err = cmd_complete(sk, hdev->id, MGMT_OP_SET_SCAN_PARAMS, 0, NULL, 0);

+ /* If background scan is running, restart it so new parameters are
+ * loaded.
+ */
+ if (test_bit(HCI_LE_SCAN, &hdev->dev_flags) &&
+ hdev->discovery.state == DISCOVERY_STOPPED) {
+ struct hci_request req;
+
+ hci_req_init(&req, hdev);
+
+ hci_req_add_le_scan_disable(&req);
+ hci_req_add_le_passive_scan(&req);
+
+ hci_req_run(&req, NULL);
+ }
+
hci_dev_unlock(hdev);

return err;
--
1.8.5.4

2014-02-26 23:21:53

by Andre Guedes

Subject: [PATCH v2 14/17] Bluetooth: Support resolvable private addresses

Only identity addresses are inserted into hdev->pend_le_conns. So,
in order to support resolvable private addresses in auto connection
mechanism, we should resolve the address before checking for pending
connections.

Thus, this patch adds an extra check in check_pending_le_conn() and
updates 'addr' and 'addr_type' variables before hci_pend_le_conn_
lookup().

Signed-off-by: Andre Guedes <[email protected]>
---
net/bluetooth/hci_event.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 46da8b6..cda92db 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3706,6 +3706,16 @@ static void check_pending_le_conn(struct hci_dev *hdev, bdaddr_t *addr,
u8 addr_type)
{
struct hci_conn *conn;
+ struct smp_irk *irk;
+
+ /* If this is a resolvable address, we should resolve it and then
+ * update address and address type variables.
+ */
+ irk = hci_get_irk(hdev, addr, addr_type);
+ if (irk) {
+ addr = &irk->bdaddr;
+ addr_type = irk->addr_type;
+ }

if (!hci_pend_le_conn_lookup(hdev, addr, addr_type))
return;
--
1.8.5.4

2014-02-26 23:21:54

by Andre Guedes

Subject: [PATCH v2 15/17] Bluetooth: Add le_auto_conn file on debugfs

This patch adds to debugfs the le_auto_conn file. This file will be
used to test LE auto connection infrastructure.

This file accept writes in the following format:
"add <address> <address_type> [auto_connect]"
"del <address> <address_type>"
"clr"

The <address type> values are:
* 0 for public address
* 1 for random address

The [auto_connect] values are (for more details see struct hci_
conn_params):
* 0 for disabled (default)
* 1 for always
* 2 for link loss

So for instance, if you want the kernel autonomously establishes
connections with device AA:BB:CC:DD:EE:FF (public address) every
time the device enters in connectable mode (starts advertising),
you should run the command:
$ echo "add AA:BB:CC:DD:EE:FF 0 1" > /sys/kernel/debug/bluetooth/hci0/le_auto_conn

To delete the connection parameters for that device, run the command:
$ echo "del AA:BB:CC:DD:EE:FF 0" > /sys/kernel/debug/bluetooth/hci0/le_auto_conn

To clear the connection parameters list, run the command:
$ echo "clr" > /sys/kernel/debug/bluetooth/hci0/le_auto_conn

Finally. to get the list of connection parameters configured in kernel,
read the le_auto_conn file:
$ cat /sys/kernel/debug/bluetooth/hci0/le_auto_conn

This file is created only if LE is enabled.

Signed-off-by: Andre Guedes <[email protected]>
---
net/bluetooth/hci_core.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 111 insertions(+)

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 6d83ca0..0b96f20 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -896,6 +896,115 @@ static const struct file_operations lowpan_debugfs_fops = {
.llseek = default_llseek,
};

+static int le_auto_conn_show(struct seq_file *sf, void *ptr)
+{
+ struct hci_dev *hdev = sf->private;
+ struct hci_conn_params *p;
+
+ hci_dev_lock(hdev);
+
+ list_for_each_entry(p, &hdev->le_conn_params, list) {
+ seq_printf(sf, "%pMR %u %u\n", &p->addr, p->addr_type,
+ p->auto_connect);
+ }
+
+ hci_dev_unlock(hdev);
+
+ return 0;
+}
+
+static int le_auto_conn_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, le_auto_conn_show, inode->i_private);
+}
+
+static ssize_t le_auto_conn_write(struct file *file, const char __user *data,
+ size_t count, loff_t *offset)
+{
+ struct seq_file *sf = file->private_data;
+ struct hci_dev *hdev = sf->private;
+ u8 auto_connect = 0;
+ bdaddr_t addr;
+ u8 addr_type;
+ char *buf;
+ int err = 0;
+ int n;
+
+ /* Don't allow partial write */
+ if (*offset != 0)
+ return -EINVAL;
+
+ if (count < 3)
+ return -EINVAL;
+
+ buf = kzalloc(count, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ if (copy_from_user(buf, data, count)) {
+ err = -EFAULT;
+ goto done;
+ }
+
+ if (memcmp(buf, "add", 3) == 0) {
+ n = sscanf(&buf[4], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu %hhu",
+ &addr.b[5], &addr.b[4], &addr.b[3], &addr.b[2],
+ &addr.b[1], &addr.b[0], &addr_type,
+ &auto_connect);
+
+ if (n < 7) {
+ err = -EINVAL;
+ goto done;
+ }
+
+ hci_dev_lock(hdev);
+ err = hci_conn_params_add(hdev, &addr, addr_type, auto_connect,
+ hdev->le_conn_min_interval,
+ hdev->le_conn_max_interval);
+ hci_dev_unlock(hdev);
+
+ if (err)
+ goto done;
+ } else if (memcmp(buf, "del", 3) == 0) {
+ n = sscanf(&buf[4], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu",
+ &addr.b[5], &addr.b[4], &addr.b[3], &addr.b[2],
+ &addr.b[1], &addr.b[0], &addr_type);
+
+ if (n < 7) {
+ err = -EINVAL;
+ goto done;
+ }
+
+ hci_dev_lock(hdev);
+ hci_conn_params_del(hdev, &addr, addr_type);
+ hci_dev_unlock(hdev);
+ } else if (memcmp(buf, "clr", 3) == 0) {
+ hci_dev_lock(hdev);
+ hci_conn_params_clear(hdev);
+ hci_pend_le_conns_clear(hdev);
+ hci_update_background_scan(hdev);
+ hci_dev_unlock(hdev);
+ } else {
+ err = -EINVAL;
+ }
+
+done:
+ kfree(buf);
+
+ if (err)
+ return err;
+ else
+ return count;
+}
+
+static const struct file_operations le_auto_conn_fops = {
+ .open = le_auto_conn_open,
+ .read = seq_read,
+ .write = le_auto_conn_write,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
/* ---- HCI requests ---- */

static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
@@ -1694,6 +1803,8 @@ static int __hci_init(struct hci_dev *hdev)
hdev, &adv_channel_map_fops);
debugfs_create_file("6lowpan", 0644, hdev->debugfs, hdev,
&lowpan_debugfs_fops);
+ debugfs_create_file("le_auto_conn", 0644, hdev->debugfs, hdev,
+ &le_auto_conn_fops);
}

return 0;
--
1.8.5.4

2014-02-26 23:21:52

by Andre Guedes

Subject: [PATCH v2 13/17] Bluetooth: Connection parameters and resolvable address

We should only accept connection parameters from identity addresses
(public or random static). Thus, we should check the address type
in hci_conn_params_add().

Additionally, since the IRK is removed during unpair, we should also
remove the connection parameters from that device.

Signed-off-by: Andre Guedes <[email protected]>
---
include/net/bluetooth/hci_core.h | 6 +++---
net/bluetooth/hci_core.c | 25 +++++++++++++++++++++----
net/bluetooth/mgmt.c | 2 ++
3 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index b159810..4b192d0 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -801,9 +801,9 @@ int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);

struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
bdaddr_t *addr, u8 addr_type);
-void hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
- u8 auto_connect, u16 conn_min_interval,
- u16 conn_max_interval);
+int hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
+ u8 auto_connect, u16 conn_min_interval,
+ u16 conn_max_interval);
void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
void hci_conn_params_clear(struct hci_dev *hdev);

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 9470a9c..6d83ca0 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3220,13 +3220,28 @@ static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
return true;
}

+static bool is_identity_address(bdaddr_t *addr, u8 addr_type)
+{
+ if (addr_type == ADDR_LE_DEV_PUBLIC)
+ return true;
+
+ /* Check for Random Static address type */
+ if ((addr->b[5] & 0xc0) == 0xc0)
+ return true;
+
+ return false;
+}
+
/* This function requires the caller holds hdev->lock */
-void hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
- u8 auto_connect, u16 conn_min_interval,
- u16 conn_max_interval)
+int hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
+ u8 auto_connect, u16 conn_min_interval,
+ u16 conn_max_interval)
{
struct hci_conn_params *params;

+ if (!is_identity_address(addr, addr_type))
+ return -EINVAL;
+
params = hci_conn_params_lookup(hdev, addr, addr_type);
if (params)
goto update;
@@ -3234,7 +3249,7 @@ void hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
params = kzalloc(sizeof(*params), GFP_KERNEL);
if (!params) {
BT_ERR("Out of memory");
- return;
+ return -ENOMEM;
}

bacpy(&params->addr, addr);
@@ -3261,6 +3276,8 @@ update:
BT_DBG("addr %pMR (type %u) auto_connect %u conn_min_interval 0x%.4x "
"conn_max_interval 0x%.4x", addr, addr_type, auto_connect,
conn_min_interval, conn_max_interval);
+
+ return 0;
}

/* This function requires the caller holds hdev->lock */
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index f878267..2e6564e 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -2416,6 +2416,8 @@ static int unpair_device(struct sock *sk, struct hci_dev *hdev, void *data,

hci_remove_irk(hdev, &cp->addr.bdaddr, addr_type);

+ hci_conn_params_del(hdev, &cp->addr.bdaddr, addr_type);
+
err = hci_remove_ltk(hdev, &cp->addr.bdaddr, addr_type);
}

--
1.8.5.4

2014-02-26 23:21:51

by Andre Guedes

Subject: [PATCH v2 12/17] Bluetooth: Auto connection and power on

When hdev is closed (e.g. Mgmt power off command, RFKILL or controller
is reset), the ongoing active connections are silently dropped by the
controller (no Disconnection Complete Event is sent to host). For that
reason, the devices that require HCI_AUTO_CONN_ALWAYS are not added to
hdev->pend_le_conns list and they won't auto connect.

So to fix this issue, during hdev closing, we remove all pending LE
connections. After adapter is powered on, we add a pending LE connection
for each HCI_AUTO_CONN_ALWAYS address.

This way, the auto connection mechanism works propely after a power
off and power on sequence as well as RFKILL block/unblock.

Signed-off-by: Andre Guedes <[email protected]>
---
net/bluetooth/hci_core.c | 1 +
net/bluetooth/mgmt.c | 13 +++++++++++++
2 files changed, 14 insertions(+)

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 507a137..9470a9c 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2266,6 +2266,7 @@ static int hci_dev_do_close(struct hci_dev *hdev)
hci_dev_lock(hdev);
hci_inquiry_cache_flush(hdev);
hci_conn_hash_flush(hdev);
+ hci_pend_le_conns_clear(hdev);
hci_dev_unlock(hdev);

hci_notify(hdev, HCI_DEV_DOWN);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index a62e22c..f878267 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -4669,6 +4669,17 @@ void mgmt_index_removed(struct hci_dev *hdev)
mgmt_event(MGMT_EV_INDEX_REMOVED, hdev, NULL, 0, NULL);
}

+/* This function requires the caller holds hdev->lock */
+static void restart_le_auto_conns(struct hci_dev *hdev)
+{
+ struct hci_conn_params *p;
+
+ list_for_each_entry(p, &hdev->le_conn_params, list) {
+ if (p->auto_connect == HCI_AUTO_CONN_ALWAYS)
+ hci_pend_le_conn_add(hdev, &p->addr, p->addr_type);
+ }
+}
+
static void powered_complete(struct hci_dev *hdev, u8 status)
{
struct cmd_lookup match = { NULL, hdev };
@@ -4677,6 +4688,8 @@ static void powered_complete(struct hci_dev *hdev, u8 status)

hci_dev_lock(hdev);

+ restart_le_auto_conns(hdev);
+
mgmt_pending_foreach(MGMT_OP_SET_POWERED, hdev, settings_rsp, &match);

new_settings(hdev, match.sk);
--
1.8.5.4

2014-02-26 23:21:50

by Andre Guedes

Subject: [PATCH v2 11/17] Bluetooth: Temporarily stop background scanning on discovery

If the user sends a mgmt start discovery command while the background
scanning is running, we should temporarily stop it. Once the discovery
finishes, we start the background scanning again.

Signed-off-by: Andre Guedes <[email protected]>
---
net/bluetooth/hci_core.c | 2 ++
net/bluetooth/mgmt.c | 12 ++++++------
2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 89ff092..507a137 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1786,6 +1786,8 @@ void hci_discovery_set_state(struct hci_dev *hdev, int state)

switch (state) {
case DISCOVERY_STOPPED:
+ hci_update_background_scan(hdev);
+
if (hdev->discovery.state != DISCOVERY_STARTING)
mgmt_discovering(hdev, 0);
break;
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index bad23d5..a62e22c 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -3439,12 +3439,12 @@ static int start_discovery(struct sock *sk, struct hci_dev *hdev,
goto failed;
}

- if (test_bit(HCI_LE_SCAN, &hdev->dev_flags)) {
- err = cmd_status(sk, hdev->id, MGMT_OP_START_DISCOVERY,
- MGMT_STATUS_BUSY);
- mgmt_pending_remove(cmd);
- goto failed;
- }
+ /* If controller is scanning, it means the background scanning
+ * is running. Thus, we should temporarily stop it in order to
+ * set the discovery scanning parameters.
+ */
+ if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
+ hci_req_add_le_scan_disable(&req);

memset(&param_cp, 0, sizeof(param_cp));

--
1.8.5.4

2014-02-26 23:21:48

by Andre Guedes

Subject: [PATCH v2 09/17] Bluetooth: Introduce LE auto connect options

This patch introduces the LE auto connection options: HCI_AUTO_CONN_
ALWAYS and HCI_AUTO_CONN_LINK_LOSS. Their working mechanism are
described as follows:

The HCI_AUTO_CONN_ALWAYS option configures the kernel to always re-
establish the connection, no matter the reason the connection was
terminated. This feature is required by some LE profiles such as
HID over GATT, Health Thermometer and Blood Pressure. These profiles
require the host autonomously connect to the device as soon as it
enters in connectable mode (start advertising) so the device is able
to delivery notifications or indications.

The BT_AUTO_CONN_LINK_LOSS option configures the kernel to re-
establish the connection in case the connection was terminated due
to a link loss. This feature is required by the majority of LE
profiles such as Proximity, Find Me, Cycling Speed and Cadence and
Time.

Signed-off-by: Andre Guedes <[email protected]>
---
include/net/bluetooth/hci_core.h | 9 ++++++++-
net/bluetooth/hci_core.c | 11 +++++++----
net/bluetooth/hci_event.c | 18 ++++++++++++++++++
3 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 617cf49..b159810 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -402,6 +402,12 @@ struct hci_conn_params {

u16 conn_min_interval;
u16 conn_max_interval;
+
+ enum {
+ HCI_AUTO_CONN_DISABLED,
+ HCI_AUTO_CONN_ALWAYS,
+ HCI_AUTO_CONN_LINK_LOSS,
+ } auto_connect;
};

extern struct list_head hci_dev_list;
@@ -796,7 +802,8 @@ int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type);
struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
bdaddr_t *addr, u8 addr_type);
void hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
- u16 conn_min_interval, u16 conn_max_interval);
+ u8 auto_connect, u16 conn_min_interval,
+ u16 conn_max_interval);
void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
void hci_conn_params_clear(struct hci_dev *hdev);

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 9a08f34..f4224dc 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3202,7 +3202,8 @@ struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,

/* This function requires the caller holds hdev->lock */
void hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
- u16 conn_min_interval, u16 conn_max_interval)
+ u8 auto_connect, u16 conn_min_interval,
+ u16 conn_max_interval)
{
struct hci_conn_params *params;

@@ -3210,6 +3211,7 @@ void hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
if (params) {
params->conn_min_interval = conn_min_interval;
params->conn_max_interval = conn_max_interval;
+ params->auto_connect = auto_connect;
return;
}

@@ -3223,12 +3225,13 @@ void hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
params->addr_type = addr_type;
params->conn_min_interval = conn_min_interval;
params->conn_max_interval = conn_max_interval;
+ params->auto_connect = auto_connect;

list_add(&params->list, &hdev->le_conn_params);

- BT_DBG("addr %pMR (type %u) conn_min_interval 0x%.4x "
- "conn_max_interval 0x%.4x", addr, addr_type, conn_min_interval,
- conn_max_interval);
+ BT_DBG("addr %pMR (type %u) auto_connect %u conn_min_interval 0x%.4x "
+ "conn_max_interval 0x%.4x", addr, addr_type, auto_connect,
+ conn_min_interval, conn_max_interval);
}

/* This function requires the caller holds hdev->lock */
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index b6631d7..46da8b6 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1841,6 +1841,7 @@ static void hci_disconn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_disconn_complete *ev = (void *) skb->data;
u8 reason = hci_to_mgmt_reason(ev->reason);
+ struct hci_conn_params *params;
struct hci_conn *conn;
bool mgmt_connected;
u8 type;
@@ -1868,6 +1869,23 @@ static void hci_disconn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
if (conn->type == ACL_LINK && conn->flush_key)
hci_remove_link_key(hdev, &conn->dst);

+ params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
+ if (params) {
+ switch (params->auto_connect) {
+ case HCI_AUTO_CONN_LINK_LOSS:
+ if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
+ break;
+ /* Fall through */
+
+ case HCI_AUTO_CONN_ALWAYS:
+ hci_pend_le_conn_add(hdev, &conn->dst, conn->dst_type);
+ break;
+
+ default:
+ break;
+ }
+ }
+
type = conn->type;

hci_proto_disconn_cfm(conn, ev->reason);
--
1.8.5.4

2014-02-26 23:21:47

by Andre Guedes

Subject: [PATCH v2 08/17] Bluetooth: Introduce LE auto connection infrastructure

This patch introduces the LE auto connection infrastructure which
will be used to implement the LE auto connection options.

In summary, the auto connection mechanism works as follows: Once the
first pending LE connection is created, the background scanning is
started. When the target device is found in range, the kernel
autonomously starts the connection attempt. If connection is
established successfully, that pending LE connection is deleted and
the background is stopped.

To achieve that, this patch introduces the hci_update_background_scan()
which controls the background scanning state. This function starts or
stops the background scanning based on the hdev->pend_le_conns list. If
there is no pending LE connection, the background scanning is stopped.
Otherwise, we start the background scanning.

Then, every time a pending LE connection is added we call hci_update_
background_scan() so the background scanning is started (in case it is
not already running). Likewise, every time a pending LE connection is
deleted we call hci_update_background_scan() so the background scanning
is stopped (in case this was the last pending LE connection) or it is
started again (in case we have more pending LE connections). Finally,
we also call hci_update_background_scan() in hci_le_conn_failed() so
the background scan is restarted in case the connection establishment
fails. This way the background scanning keeps running until all pending
LE connection are established.

At this point, resolvable addresses are not support by this
infrastructure. The proper support is added in upcoming patches.

Signed-off-by: Andre Guedes <[email protected]>
---
include/net/bluetooth/hci_core.h | 2 +
net/bluetooth/hci_conn.c | 5 +++
net/bluetooth/hci_core.c | 94 +++++++++++++++++++++++++++++++++++++++-
net/bluetooth/hci_event.c | 38 ++++++++++++++++
4 files changed, 137 insertions(+), 2 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index e08405d..617cf49 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -806,6 +806,8 @@ void hci_pend_le_conn_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
void hci_pend_le_conn_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
void hci_pend_le_conns_clear(struct hci_dev *hdev);

+void hci_update_background_scan(struct hci_dev *hdev);
+
void hci_uuids_clear(struct hci_dev *hdev);

void hci_link_keys_clear(struct hci_dev *hdev);
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 46b2713..7d6f05e 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -527,6 +527,11 @@ void hci_le_conn_failed(struct hci_conn *conn, u8 status)
hci_proto_connect_cfm(conn, status);

hci_conn_del(conn);
+
+ /* Since we may have temporarily stopped the background scanning in
+ * favor of connection establishment, we should restart it.
+ */
+ hci_update_background_scan(hdev);
}

static void create_le_conn_complete(struct hci_dev *hdev, u8 status)
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 142ecd8..9a08f34 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3281,7 +3281,7 @@ void hci_pend_le_conn_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)

entry = hci_pend_le_conn_lookup(hdev, addr, addr_type);
if (entry)
- return;
+ goto done;

entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (!entry) {
@@ -3295,6 +3295,9 @@ void hci_pend_le_conn_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
list_add(&entry->list, &hdev->pend_le_conns);

BT_DBG("addr %pMR (type %u)", addr, addr_type);
+
+done:
+ hci_update_background_scan(hdev);
}

/* This function requires the caller holds hdev->lock */
@@ -3304,12 +3307,15 @@ void hci_pend_le_conn_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)

entry = hci_pend_le_conn_lookup(hdev, addr, addr_type);
if (!entry)
- return;
+ goto done;

list_del(&entry->list);
kfree(entry);

BT_DBG("addr %pMR (type %u)", addr, addr_type);
+
+done:
+ hci_update_background_scan(hdev);
}

/* This function requires the caller holds hdev->lock */
@@ -4946,3 +4952,87 @@ void hci_req_add_le_scan_disable(struct hci_request *req)
cp.enable = LE_SCAN_DISABLE;
hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
}
+
+static void update_background_scan_complete(struct hci_dev *hdev, u8 status)
+{
+ if (status)
+ BT_DBG("HCI request failed to update background scanning: "
+ "status 0x%2.2x", status);
+}
+
+/* This function controls the background scanning based on hdev->pend_le_conns
+ * list. If there are pending LE connection we start the background scanning,
+ * otherwise we stop it.
+ *
+ * This function requires the caller holds hdev->lock.
+ */
+void hci_update_background_scan(struct hci_dev *hdev)
+{
+ struct hci_cp_le_set_scan_param param_cp;
+ struct hci_cp_le_set_scan_enable enable_cp;
+ struct hci_request req;
+ struct hci_conn *conn;
+ int err;
+
+ hci_req_init(&req, hdev);
+
+ if (list_empty(&hdev->pend_le_conns)) {
+ /* If there is no pending LE connections, we should stop
+ * the background scanning.
+ */
+
+ /* If controller is not scanning we are done. */
+ if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
+ return;
+
+ hci_req_add_le_scan_disable(&req);
+
+ BT_DBG("%s stopping background scanning", hdev->name);
+ } else {
+ u8 own_addr_type;
+
+ /* If there is at least one pending LE connection, we should
+ * keep the background scan running.
+ */
+
+ /* If controller is already scanning we are done. */
+ if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
+ return;
+
+ /* If controller is connecting, we should not start scanning
+ * since some controllers are not able to scan and connect at
+ * the same time.
+ */
+ conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
+ if (conn)
+ return;
+
+ /* Set require_privacy to true to avoid identification from
+ * unknown peer devices. Since this is passive scanning, no
+ * SCAN_REQ using the local identity should be sent. Mandating
+ * privacy is just an extra precaution.
+ */
+ if (hci_update_random_address(&req, true, &own_addr_type))
+ return;
+
+ memset(&param_cp, 0, sizeof(param_cp));
+ param_cp.type = LE_SCAN_PASSIVE;
+ param_cp.interval = cpu_to_le16(hdev->le_scan_interval);
+ param_cp.window = cpu_to_le16(hdev->le_scan_window);
+ param_cp.own_address_type = own_addr_type;
+ hci_req_add(&req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
+ &param_cp);
+
+ memset(&enable_cp, 0, sizeof(enable_cp));
+ enable_cp.enable = LE_SCAN_ENABLE;
+ enable_cp.filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
+ hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
+ &enable_cp);
+
+ BT_DBG("%s starting background scanning", hdev->name);
+ }
+
+ err = hci_req_run(&req, update_background_scan_complete);
+ if (err)
+ BT_ERR("Failed to run HCI request: err %d", err);
+}
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index eaa6965..b6631d7 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3677,25 +3677,63 @@ static void hci_le_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)

hci_proto_connect_cfm(conn, ev->status);

+ hci_pend_le_conn_del(hdev, &conn->dst, conn->dst_type);
+
unlock:
hci_dev_unlock(hdev);
}

+/* This function requires the caller holds hdev->lock */
+static void check_pending_le_conn(struct hci_dev *hdev, bdaddr_t *addr,
+ u8 addr_type)
+{
+ struct hci_conn *conn;
+
+ if (!hci_pend_le_conn_lookup(hdev, addr, addr_type))
+ return;
+
+ conn = hci_connect_le(hdev, addr, addr_type, BT_SECURITY_LOW,
+ HCI_AT_NO_BONDING);
+ if (!IS_ERR(conn))
+ return;
+
+ switch (PTR_ERR(conn)) {
+ case -EBUSY:
+ /* If hci_connect() returns -EBUSY it means there is already
+ * an LE connection attempt going on. Since controllers don't
+ * support more than one connection attempt at the time, we
+ * don't consider this an error case.
+ */
+ break;
+ default:
+ BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
+ }
+}
+
static void hci_le_adv_report_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
u8 num_reports = skb->data[0];
void *ptr = &skb->data[1];
s8 rssi;

+ hci_dev_lock(hdev);
+
while (num_reports--) {
struct hci_ev_le_advertising_info *ev = ptr;

+ if (ev->evt_type == LE_ADV_IND ||
+ ev->evt_type == LE_ADV_DIRECT_IND)
+ check_pending_le_conn(hdev, &ev->bdaddr,
+ ev->bdaddr_type);
+
rssi = ev->data[ev->length];
mgmt_device_found(hdev, &ev->bdaddr, LE_LINK, ev->bdaddr_type,
NULL, rssi, 0, 1, ev->data, ev->length);

ptr += sizeof(*ev) + ev->length + 1;
}
+
+ hci_dev_unlock(hdev);
}

static void hci_le_ltk_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
--
1.8.5.4

2014-02-26 23:21:49

by Andre Guedes

Subject: [PATCH v2 10/17] Bluetooth: Connection parameters and auto connection

This patch modifies hci_conn_params_add() and hci_conn_params_del() so
they also add/delete pending LE connections according to the auto_
connect option. This way, background scan is automatically triggered/
untriggered when connection parameters are added/removed.

For instance, when a new connection parameters with HCI_AUTO_CONN_ALWAYS
option is added and we are not connected to the device, we add a pending
LE connection for that device.

Likewise, when the connection parameters are updated we add or delete
a pending LE connection according to its new auto_connect option.

Finally, when the connection parameter is deleted we also delete the
pending LE connection (if any).

Signed-off-by: Andre Guedes <[email protected]>
---
net/bluetooth/hci_core.c | 42 +++++++++++++++++++++++++++++++++++-------
1 file changed, 35 insertions(+), 7 deletions(-)

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index f4224dc..89ff092 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3200,6 +3200,23 @@ struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
return NULL;
}

+static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)
+{
+ struct hci_conn *conn;
+
+ conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, addr);
+ if (!conn)
+ return false;
+
+ if (conn->dst_type != type)
+ return false;
+
+ if (conn->state != BT_CONNECTED)
+ return false;
+
+ return true;
+}
+
/* This function requires the caller holds hdev->lock */
void hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
u8 auto_connect, u16 conn_min_interval,
@@ -3208,12 +3225,8 @@ void hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
struct hci_conn_params *params;

params = hci_conn_params_lookup(hdev, addr, addr_type);
- if (params) {
- params->conn_min_interval = conn_min_interval;
- params->conn_max_interval = conn_max_interval;
- params->auto_connect = auto_connect;
- return;
- }
+ if (params)
+ goto update;

params = kzalloc(sizeof(*params), GFP_KERNEL);
if (!params) {
@@ -3223,11 +3236,24 @@ void hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,

bacpy(&params->addr, addr);
params->addr_type = addr_type;
+
+ list_add(&params->list, &hdev->le_conn_params);
+
+update:
params->conn_min_interval = conn_min_interval;
params->conn_max_interval = conn_max_interval;
params->auto_connect = auto_connect;

- list_add(&params->list, &hdev->le_conn_params);
+ switch (auto_connect) {
+ case HCI_AUTO_CONN_DISABLED:
+ case HCI_AUTO_CONN_LINK_LOSS:
+ hci_pend_le_conn_del(hdev, addr, addr_type);
+ break;
+ case HCI_AUTO_CONN_ALWAYS:
+ if (!is_connected(hdev, addr, addr_type))
+ hci_pend_le_conn_add(hdev, addr, addr_type);
+ break;
+ }

BT_DBG("addr %pMR (type %u) auto_connect %u conn_min_interval 0x%.4x "
"conn_max_interval 0x%.4x", addr, addr_type, auto_connect,
@@ -3243,6 +3269,8 @@ void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
if (!params)
return;

+ hci_pend_le_conn_del(hdev, addr, addr_type);
+
list_del(&params->list);
kfree(params);

--
1.8.5.4

2014-02-26 23:21:46

by Andre Guedes

Subject: [PATCH v2 07/17] Bluetooth: Introduce hdev->pend_le_conn list

This patch introduces the hdev->pend_le_conn list which holds the
device addresses the kernel should autonomously connect. It also
introduces some helper functions to manipulate the list.

The list and helper functions will be used by the next patch which
implements the LE auto connection infrastructure.

Signed-off-by: Andre Guedes <[email protected]>
---
include/net/bluetooth/hci_core.h | 7 +++++
net/bluetooth/hci_core.c | 68 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 75 insertions(+)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 20bdb2e..e08405d 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -284,6 +284,7 @@ struct hci_dev {
struct list_head identity_resolving_keys;
struct list_head remote_oob_data;
struct list_head le_conn_params;
+ struct list_head pend_le_conns;

struct hci_dev_stats stat;

@@ -799,6 +800,12 @@ void hci_conn_params_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,
void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
void hci_conn_params_clear(struct hci_dev *hdev);

+struct bdaddr_list *hci_pend_le_conn_lookup(struct hci_dev *hdev,
+ bdaddr_t *addr, u8 addr_type);
+void hci_pend_le_conn_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
+void hci_pend_le_conn_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
+void hci_pend_le_conns_clear(struct hci_dev *hdev);
+
void hci_uuids_clear(struct hci_dev *hdev);

void hci_link_keys_clear(struct hci_dev *hdev);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 9a078cf..142ecd8 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3259,6 +3259,72 @@ void hci_conn_params_clear(struct hci_dev *hdev)
BT_DBG("All LE connection parameters were removed");
}

+/* This function requires the caller holds hdev->lock */
+struct bdaddr_list *hci_pend_le_conn_lookup(struct hci_dev *hdev,
+ bdaddr_t *addr, u8 addr_type)
+{
+ struct bdaddr_list *entry;
+
+ list_for_each_entry(entry, &hdev->pend_le_conns, list) {
+ if (bacmp(&entry->bdaddr, addr) == 0 &&
+ entry->bdaddr_type == addr_type)
+ return entry;
+ }
+
+ return NULL;
+}
+
+/* This function requires the caller holds hdev->lock */
+void hci_pend_le_conn_add(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
+{
+ struct bdaddr_list *entry;
+
+ entry = hci_pend_le_conn_lookup(hdev, addr, addr_type);
+ if (entry)
+ return;
+
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry) {
+ BT_ERR("Out of memory");
+ return;
+ }
+
+ bacpy(&entry->bdaddr, addr);
+ entry->bdaddr_type = addr_type;
+
+ list_add(&entry->list, &hdev->pend_le_conns);
+
+ BT_DBG("addr %pMR (type %u)", addr, addr_type);
+}
+
+/* This function requires the caller holds hdev->lock */
+void hci_pend_le_conn_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
+{
+ struct bdaddr_list *entry;
+
+ entry = hci_pend_le_conn_lookup(hdev, addr, addr_type);
+ if (!entry)
+ return;
+
+ list_del(&entry->list);
+ kfree(entry);
+
+ BT_DBG("addr %pMR (type %u)", addr, addr_type);
+}
+
+/* This function requires the caller holds hdev->lock */
+void hci_pend_le_conns_clear(struct hci_dev *hdev)
+{
+ struct bdaddr_list *entry, *tmp;
+
+ list_for_each_entry_safe(entry, tmp, &hdev->pend_le_conns, list) {
+ list_del(&entry->list);
+ kfree(entry);
+ }
+
+ BT_DBG("All LE pending connections cleared");
+}
+
static void inquiry_complete(struct hci_dev *hdev, u8 status)
{
if (status) {
@@ -3441,6 +3507,7 @@ struct hci_dev *hci_alloc_dev(void)
INIT_LIST_HEAD(&hdev->identity_resolving_keys);
INIT_LIST_HEAD(&hdev->remote_oob_data);
INIT_LIST_HEAD(&hdev->le_conn_params);
+ INIT_LIST_HEAD(&hdev->pend_le_conns);
INIT_LIST_HEAD(&hdev->conn_hash.list);

INIT_WORK(&hdev->rx_work, hci_rx_work);
@@ -3642,6 +3709,7 @@ void hci_unregister_dev(struct hci_dev *hdev)
hci_smp_irks_clear(hdev);
hci_remote_oob_data_clear(hdev);
hci_conn_params_clear(hdev);
+ hci_pend_le_conns_clear(hdev);
hci_dev_unlock(hdev);

hci_dev_put(hdev);
--
1.8.5.4

2014-02-26 23:21:44

by Andre Guedes

Subject: [PATCH v2 05/17] Bluetooth: Refactor HCI connection code

hci_connect() is a very simple and useless wrapper of hci_connect_acl
and hci_connect_le functions. Addtionally, all places where hci_connect
is called the link type value is passed explicitly. This way, we can
safely delete hci_connect, declare hci_connect_acl and hci_connect_le
in hci_core.h and call them directly.

No functionality is changed by this patch.

Signed-off-by: Andre Guedes <[email protected]>
---
include/net/bluetooth/hci_core.h | 6 ++++--
net/bluetooth/hci_conn.c | 24 ++++--------------------
net/bluetooth/l2cap_core.c | 7 +++----
net/bluetooth/mgmt.c | 8 ++++----
4 files changed, 15 insertions(+), 30 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 4253bdf..20bdb2e 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -641,8 +641,10 @@ void hci_chan_del(struct hci_chan *chan);
void hci_chan_list_flush(struct hci_conn *conn);
struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);

-struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
- __u8 dst_type, __u8 sec_level, __u8 auth_type);
+struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
+ u8 dst_type, u8 sec_level, u8 auth_type);
+struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
+ u8 sec_level, u8 auth_type);
struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
__u16 setting);
int hci_conn_check_link_mode(struct hci_conn *conn);
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 296b8ee..5c392aa 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -624,8 +624,8 @@ static void stop_scan_complete(struct hci_dev *hdev, u8 status)
}
}

-static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
- u8 dst_type, u8 sec_level, u8 auth_type)
+struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
+ u8 dst_type, u8 sec_level, u8 auth_type)
{
struct hci_conn_params *params;
struct hci_conn *conn;
@@ -729,8 +729,8 @@ done:
return conn;
}

-static struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
- u8 sec_level, u8 auth_type)
+struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
+ u8 sec_level, u8 auth_type)
{
struct hci_conn *acl;

@@ -799,22 +799,6 @@ struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
return sco;
}

-/* Create SCO, ACL or LE connection. */
-struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
- __u8 dst_type, __u8 sec_level, __u8 auth_type)
-{
- BT_DBG("%s dst %pMR type 0x%x", hdev->name, dst, type);
-
- switch (type) {
- case LE_LINK:
- return hci_connect_le(hdev, dst, dst_type, sec_level, auth_type);
- case ACL_LINK:
- return hci_connect_acl(hdev, dst, sec_level, auth_type);
- }
-
- return ERR_PTR(-EINVAL);
-}
-
/* Check link security requirement */
int hci_conn_check_link_mode(struct hci_conn *conn)
{
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index d8d9902..ab5e2bd 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -7109,11 +7109,10 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,
auth_type = l2cap_get_auth_type(chan);

if (bdaddr_type_is_le(dst_type))
- hcon = hci_connect(hdev, LE_LINK, dst, dst_type,
- chan->sec_level, auth_type);
+ hcon = hci_connect_le(hdev, dst, dst_type, chan->sec_level,
+ auth_type);
else
- hcon = hci_connect(hdev, ACL_LINK, dst, dst_type,
- chan->sec_level, auth_type);
+ hcon = hci_connect_acl(hdev, dst, chan->sec_level, auth_type);

if (IS_ERR(hcon)) {
err = PTR_ERR(hcon);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index cfcaf97..9fc7c1d 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -2816,11 +2816,11 @@ static int pair_device(struct sock *sk, struct hci_dev *hdev, void *data,
auth_type = HCI_AT_DEDICATED_BONDING_MITM;

if (cp->addr.type == BDADDR_BREDR)
- conn = hci_connect(hdev, ACL_LINK, &cp->addr.bdaddr,
- cp->addr.type, sec_level, auth_type);
+ conn = hci_connect_acl(hdev, &cp->addr.bdaddr, sec_level,
+ auth_type);
else
- conn = hci_connect(hdev, LE_LINK, &cp->addr.bdaddr,
- cp->addr.type, sec_level, auth_type);
+ conn = hci_connect_le(hdev, &cp->addr.bdaddr, cp->addr.type,
+ sec_level, auth_type);

if (IS_ERR(conn)) {
int status;
--
1.8.5.4

2014-02-26 23:21:43

by Andre Guedes

Subject: [PATCH v2 04/17] Bluetooth: Remove unused function

This patch removes hci_create_le_conn() since it is not used anymore.

Signed-off-by: Andre Guedes <[email protected]>
---
net/bluetooth/hci_conn.c | 43 -------------------------------------------
1 file changed, 43 deletions(-)

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 2b8bfda..296b8ee 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -551,49 +551,6 @@ done:
hci_dev_unlock(hdev);
}

-static int hci_create_le_conn(struct hci_conn *conn)
-{
- struct hci_dev *hdev = conn->hdev;
- struct hci_cp_le_create_conn cp;
- struct hci_request req;
- u8 own_addr_type;
- int err;
-
- hci_req_init(&req, hdev);
-
- memset(&cp, 0, sizeof(cp));
-
- /* Update random address, but set require_privacy to false so
- * that we never connect with an unresolvable address.
- */
- err = hci_update_random_address(&req, false, &own_addr_type);
- if (err < 0)
- return err;
-
- conn->src_type = own_addr_type;
-
- cp.scan_interval = cpu_to_le16(hdev->le_scan_interval);
- cp.scan_window = cpu_to_le16(hdev->le_scan_window);
- bacpy(&cp.peer_addr, &conn->dst);
- cp.peer_addr_type = conn->dst_type;
- cp.own_address_type = own_addr_type;
- cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
- cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
- cp.supervision_timeout = __constant_cpu_to_le16(0x002a);
- cp.min_ce_len = __constant_cpu_to_le16(0x0000);
- cp.max_ce_len = __constant_cpu_to_le16(0x0000);
-
- hci_req_add(&req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
-
- err = hci_req_run(&req, create_le_conn_complete);
- if (err) {
- hci_conn_del(conn);
- return err;
- }
-
- return 0;
-}
-
static void hci_req_add_le_create_conn(struct hci_request *req,
struct hci_conn *conn)
{
--
1.8.5.4

2014-02-26 23:21:45

by Andre Guedes

Subject: [PATCH v2 06/17] Bluetooth: Move address type conversion to outside hci_connect_le

This patch moves address type conversion (L2CAP address type to HCI
address type) to outside hci_connect_le. This way, we avoid back and
forth address type conversion in a comming patch.

So hci_connect_le() now expects 'dst_type' parameter in HCI address
type convention.

Signed-off-by: Andre Guedes <[email protected]>
---
net/bluetooth/hci_conn.c | 6 ------
net/bluetooth/l2cap_core.c | 12 ++++++++++--
net/bluetooth/mgmt.c | 16 +++++++++++++---
3 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 5c392aa..46b2713 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -659,12 +659,6 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
if (conn)
return ERR_PTR(-EBUSY);

- /* Convert from L2CAP channel address type to HCI address type */
- if (dst_type == BDADDR_LE_PUBLIC)
- dst_type = ADDR_LE_DEV_PUBLIC;
- else
- dst_type = ADDR_LE_DEV_RANDOM;
-
/* When given an identity address with existing identity
* resolving key, the connection needs to be established
* to a resolvable random address.
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index ab5e2bd..9ed2168 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -7108,11 +7108,19 @@ int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid,

auth_type = l2cap_get_auth_type(chan);

- if (bdaddr_type_is_le(dst_type))
+ if (bdaddr_type_is_le(dst_type)) {
+ /* Convert from L2CAP channel address type to HCI address type
+ */
+ if (dst_type == BDADDR_LE_PUBLIC)
+ dst_type = ADDR_LE_DEV_PUBLIC;
+ else
+ dst_type = ADDR_LE_DEV_RANDOM;
+
hcon = hci_connect_le(hdev, dst, dst_type, chan->sec_level,
auth_type);
- else
+ } else {
hcon = hci_connect_acl(hdev, dst, chan->sec_level, auth_type);
+ }

if (IS_ERR(hcon)) {
err = PTR_ERR(hcon);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 9fc7c1d..bad23d5 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -2815,12 +2815,22 @@ static int pair_device(struct sock *sk, struct hci_dev *hdev, void *data,
else
auth_type = HCI_AT_DEDICATED_BONDING_MITM;

- if (cp->addr.type == BDADDR_BREDR)
+ if (cp->addr.type == BDADDR_BREDR) {
conn = hci_connect_acl(hdev, &cp->addr.bdaddr, sec_level,
auth_type);
- else
- conn = hci_connect_le(hdev, &cp->addr.bdaddr, cp->addr.type,
+ } else {
+ u8 addr_type;
+
+ /* Convert from L2CAP channel address type to HCI address type
+ */
+ if (cp->addr.type == BDADDR_LE_PUBLIC)
+ addr_type = ADDR_LE_DEV_PUBLIC;
+ else
+ addr_type = ADDR_LE_DEV_RANDOM;
+
+ conn = hci_connect_le(hdev, &cp->addr.bdaddr, addr_type,
sec_level, auth_type);
+ }

if (IS_ERR(conn)) {
int status;
--
1.8.5.4

2014-02-26 23:21:42

by Andre Guedes

Subject: [PATCH v2 03/17] Bluetooth: Stop scanning on LE connection

Some LE controllers don't support scanning and creating a connection
at the same time. So we should always stop scanning in order to
establish the connection.

Since we may prematurely stop the discovery procedure in favor of
the connection establishment, we should also cancel hdev->le_scan_
disable delayed work and set the discovery state to DISCOVERY_STOPPED.

This change does a small improvement since it is not mandatory the
user stops scanning before connecting anymore. Moreover, this change
is required by upcoming LE auto connection mechanism in order to work
properly with controllers that don't support background scanning and
connection establishment at the same time.

In future, we might want to do a small optimization by checking if
controller is able to scan and connect at the same time. For now,
we want the simplest approach so we always stop scanning (even if
the controller is able to carry out both operations).

Signed-off-by: Andre Guedes <[email protected]>
---
include/net/bluetooth/hci.h | 1 +
net/bluetooth/hci_conn.c | 92 ++++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 91 insertions(+), 2 deletions(-)

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 1bb45a4..c3834d3 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -356,6 +356,7 @@ enum {

/* ---- HCI Error Codes ---- */
#define HCI_ERROR_AUTH_FAILURE 0x05
+#define HCI_ERROR_MEMORY_EXCEEDED 0x07
#define HCI_ERROR_CONNECTION_TIMEOUT 0x08
#define HCI_ERROR_REJ_BAD_ADDR 0x0f
#define HCI_ERROR_REMOTE_USER_TERM 0x13
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index dc8aad9..2b8bfda 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -594,12 +594,86 @@ static int hci_create_le_conn(struct hci_conn *conn)
return 0;
}

+static void hci_req_add_le_create_conn(struct hci_request *req,
+ struct hci_conn *conn)
+{
+ struct hci_cp_le_create_conn cp;
+ struct hci_dev *hdev = conn->hdev;
+ u8 own_addr_type;
+
+ memset(&cp, 0, sizeof(cp));
+
+ /* Update random address, but set require_privacy to false so
+ * that we never connect with an unresolvable address.
+ */
+ if (hci_update_random_address(req, false, &own_addr_type))
+ return;
+
+ /* Save the address type used for this connnection attempt so we able
+ * to retrieve this information if we need it.
+ */
+ conn->src_type = own_addr_type;
+
+ cp.scan_interval = cpu_to_le16(hdev->le_scan_interval);
+ cp.scan_window = cpu_to_le16(hdev->le_scan_window);
+ bacpy(&cp.peer_addr, &conn->dst);
+ cp.peer_addr_type = conn->dst_type;
+ cp.own_address_type = own_addr_type;
+ cp.conn_interval_min = cpu_to_le16(conn->le_conn_min_interval);
+ cp.conn_interval_max = cpu_to_le16(conn->le_conn_max_interval);
+ cp.supervision_timeout = __constant_cpu_to_le16(0x002a);
+ cp.min_ce_len = __constant_cpu_to_le16(0x0000);
+ cp.max_ce_len = __constant_cpu_to_le16(0x0000);
+
+ hci_req_add(req, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
+}
+
+static void stop_scan_complete(struct hci_dev *hdev, u8 status)
+{
+ struct hci_request req;
+ struct hci_conn *conn;
+ int err;
+
+ conn = hci_conn_hash_lookup_state(hdev, LE_LINK, BT_CONNECT);
+ if (!conn)
+ return;
+
+ if (status) {
+ BT_DBG("HCI request failed to stop scanning: status 0x%2.2x",
+ status);
+
+ hci_dev_lock(hdev);
+ hci_le_conn_failed(conn, status);
+ hci_dev_unlock(hdev);
+ return;
+ }
+
+ /* Since we may have prematurely stopped discovery procedure, we should
+ * update discovery state.
+ */
+ cancel_delayed_work(&hdev->le_scan_disable);
+ hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+
+ hci_req_init(&req, hdev);
+
+ hci_req_add_le_create_conn(&req, conn);
+
+ err = hci_req_run(&req, create_le_conn_complete);
+ if (err) {
+ hci_dev_lock(hdev);
+ hci_le_conn_failed(conn, HCI_ERROR_MEMORY_EXCEEDED);
+ hci_dev_unlock(hdev);
+ return;
+ }
+}
+
static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
u8 dst_type, u8 sec_level, u8 auth_type)
{
struct hci_conn_params *params;
struct hci_conn *conn;
struct smp_irk *irk;
+ struct hci_request req;
int err;

if (test_bit(HCI_ADVERTISING, &hdev->flags))
@@ -675,9 +749,23 @@ static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
conn->le_conn_max_interval = hdev->le_conn_max_interval;
}

- err = hci_create_le_conn(conn);
- if (err)
+ hci_req_init(&req, hdev);
+
+ /* If controller is scanning, we stop it since some controllers are
+ * not able to scan and connect at the same time.
+ */
+ if (test_bit(HCI_LE_SCAN, &hdev->dev_flags)) {
+ hci_req_add_le_scan_disable(&req);
+ err = hci_req_run(&req, stop_scan_complete);
+ } else {
+ hci_req_add_le_create_conn(&req, conn);
+ err = hci_req_run(&req, create_le_conn_complete);
+ }
+
+ if (err) {
+ hci_conn_del(conn);
return ERR_PTR(err);
+ }

done:
hci_conn_hold(conn);
--
1.8.5.4

2014-02-26 23:21:41

by Andre Guedes

Subject: [PATCH v2 02/17] Bluetooth: Declare le_conn_failed in hci_core.h

This patch adds the "hci_" prefix to le_conn_failed() helper and
declares it in hci_core.h so it can be reused in hci_event.c.

Signed-off-by: Andre Guedes <[email protected]>
---
include/net/bluetooth/hci_core.h | 2 ++
net/bluetooth/hci_conn.c | 4 ++--
net/bluetooth/hci_event.c | 6 +-----
3 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index bef65d0..4253bdf 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -653,6 +653,8 @@ int hci_conn_switch_role(struct hci_conn *conn, __u8 role);

void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active);

+void hci_le_conn_failed(struct hci_conn *conn, u8 status);
+
/*
* hci_conn_get() and hci_conn_put() are used to control the life-time of an
* "hci_conn" object. They do not guarantee that the hci_conn object is running,
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 3d6b1cf..dc8aad9 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -515,7 +515,7 @@ struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
EXPORT_SYMBOL(hci_get_route);

/* This function requires the caller holds hdev->lock */
-static void le_conn_failed(struct hci_conn *conn, u8 status)
+void hci_le_conn_failed(struct hci_conn *conn, u8 status)
{
struct hci_dev *hdev = conn->hdev;

@@ -545,7 +545,7 @@ static void create_le_conn_complete(struct hci_dev *hdev, u8 status)
if (!conn)
goto done;

- le_conn_failed(conn, status);
+ hci_le_conn_failed(conn, status);

done:
hci_dev_unlock(hdev);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 877cee8..eaa6965 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3658,11 +3658,7 @@ static void hci_le_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
}

if (ev->status) {
- mgmt_connect_failed(hdev, &conn->dst, conn->type,
- conn->dst_type, ev->status);
- hci_proto_connect_cfm(conn, ev->status);
- conn->state = BT_CLOSED;
- hci_conn_del(conn);
+ hci_le_conn_failed(conn, ev->status);
goto unlock;
}

--
1.8.5.4