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Bluetooth: Add support for LE ping feature

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Changes made to add HCI Write Authenticated Payload timeout
command for LE Ping feature.

As per the Core Specification 5.0 Volume 2 Part E Section 7.3.94,
the following code changes implements
HCI Write Authenticated Payload timeout command for LE Ping feature.

Signed-off-by: Spoorthi Ravishankar Koppad <spoorthix.k@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Spoorthi Ravishankar Koppad 2019-06-21 14:51:56 +05:30 • committed by Marcel Holtmann
parent 28261da8a2
commit 302975cba1
6 changed files with 131 additions and 0 deletions
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20
include/net/bluetooth/hci.h
View file

@ -1143,6 +1143,26 @@ struct hci_cp_write_sc_support {
__u8 support;
} __packed;
#define HCI_OP_READ_AUTH_PAYLOAD_TO 0x0c7b
struct hci_cp_read_auth_payload_to {
__le16 handle;
} __packed;
struct hci_rp_read_auth_payload_to {
__u8 status;
__le16 handle;
__le16 timeout;
} __packed;
#define HCI_OP_WRITE_AUTH_PAYLOAD_TO 0x0c7c
struct hci_cp_write_auth_payload_to {
__le16 handle;
__le16 timeout;
} __packed;
struct hci_rp_write_auth_payload_to {
__u8 status;
__le16 handle;
} __packed;
#define HCI_OP_READ_LOCAL_OOB_EXT_DATA 0x0c7d
struct hci_rp_read_local_oob_ext_data {
__u8 status;

4
include/net/bluetooth/hci_core.h
View file

@ -199,6 +199,8 @@ struct adv_info {
/* Default min/max age of connection information (1s/3s) */
#define DEFAULT_CONN_INFO_MIN_AGE 1000
#define DEFAULT_CONN_INFO_MAX_AGE 3000
/* Default authenticated payload timeout 30s */
#define DEFAULT_AUTH_PAYLOAD_TIMEOUT 0x0bb8
struct amp_assoc {
__u16 len;
@ -275,6 +277,7 @@ struct hci_dev {
__u16 discov_interleaved_timeout;
__u16 conn_info_min_age;
__u16 conn_info_max_age;
__u16 auth_payload_timeout;
__u8 ssp_debug_mode;
__u8 hw_error_code;
__u32 clock;
@ -481,6 +484,7 @@ struct hci_conn {
__u16 disc_timeout;
__u16 conn_timeout;
__u16 setting;
__u16 auth_payload_timeout;
__u16 le_conn_min_interval;
__u16 le_conn_max_interval;
__u16 le_conn_interval;

3
net/bluetooth/hci_conn.c
View file

@ -520,6 +520,9 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
conn->disc_timeout = HCI_DISCONN_TIMEOUT;
/* Set Default Authenticated payload timeout to 30s */
conn->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
if (conn->role == HCI_ROLE_MASTER)
conn->out = true;

1
net/bluetooth/hci_core.c
View file

@ -3200,6 +3200,7 @@ struct hci_dev *hci_alloc_dev(void)
hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
mutex_init(&hdev->lock);
mutex_init(&hdev->req_lock);

31
net/bluetooth/hci_debugfs.c
View file

@ -941,6 +941,35 @@ static int adv_max_interval_get(void *data, u64 *val)
DEFINE_SIMPLE_ATTRIBUTE(adv_max_interval_fops, adv_max_interval_get,
adv_max_interval_set, "%llu\n");
static int auth_payload_timeout_set(void *data, u64 val)
{
struct hci_dev *hdev = data;
if (val < 0x0001 || val > 0xffff)
return -EINVAL;
hci_dev_lock(hdev);
hdev->auth_payload_timeout = val;
hci_dev_unlock(hdev);
return 0;
}
static int auth_payload_timeout_get(void *data, u64 *val)
{
struct hci_dev *hdev = data;
hci_dev_lock(hdev);
*val = hdev->auth_payload_timeout;
hci_dev_unlock(hdev);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(auth_payload_timeout_fops,
auth_payload_timeout_get,
auth_payload_timeout_set, "%llu\n");
DEFINE_QUIRK_ATTRIBUTE(quirk_strict_duplicate_filter,
HCI_QUIRK_STRICT_DUPLICATE_FILTER);
DEFINE_QUIRK_ATTRIBUTE(quirk_simultaneous_discovery,
@ -994,6 +1023,8 @@ void hci_debugfs_create_le(struct hci_dev *hdev)
&adv_max_interval_fops);
debugfs_create_u16("discov_interleaved_timeout", 0644, hdev->debugfs,
&hdev->discov_interleaved_timeout);
debugfs_create_file("auth_payload_timeout", 0644, hdev->debugfs, hdev,
&auth_payload_timeout_fops);
debugfs_create_file("quirk_strict_duplicate_filter", 0644,
hdev->debugfs, hdev,

72
net/bluetooth/hci_event.c
View file

@ -579,6 +579,51 @@ static void hci_cc_read_local_commands(struct hci_dev *hdev,
memcpy(hdev->commands, rp->commands, sizeof(hdev->commands));
}
static void hci_cc_read_auth_payload_timeout(struct hci_dev *hdev,
struct sk_buff *skb)
{
struct hci_rp_read_auth_payload_to *rp = (void *)skb->data;
struct hci_conn *conn;
BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
if (rp->status)
return;
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
if (conn)
conn->auth_payload_timeout = __le16_to_cpu(rp->timeout);
hci_dev_unlock(hdev);
}
static void hci_cc_write_auth_payload_timeout(struct hci_dev *hdev,
struct sk_buff *skb)
{
struct hci_rp_write_auth_payload_to *rp = (void *)skb->data;
struct hci_conn *conn;
void *sent;
BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
if (rp->status)
return;
sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO);
if (!sent)
return;
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
if (conn)
conn->auth_payload_timeout = get_unaligned_le16(sent + 2);
hci_dev_unlock(hdev);
}
static void hci_cc_read_local_features(struct hci_dev *hdev,
struct sk_buff *skb)
{
@ -2975,6 +3020,25 @@ static void hci_encrypt_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
goto unlock;
}
/* Set the default Authenticated Payload Timeout after
* an LE Link is established. As per Core Spec v5.0, Vol 2, Part B
* Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be
* sent when the link is active and Encryption is enabled, the conn
* type can be either LE or ACL and controller must support LMP Ping.
* Ensure for AES-CCM encryption as well.
*/
if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
test_bit(HCI_CONN_AES_CCM, &conn->flags) &&
((conn->type == ACL_LINK && lmp_ping_capable(hdev)) ||
(conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) {
struct hci_cp_write_auth_payload_to cp;
cp.handle = cpu_to_le16(conn->handle);
cp.timeout = cpu_to_le16(hdev->auth_payload_timeout);
hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO,
sizeof(cp), &cp);
}
notify:
if (conn->state == BT_CONFIG) {
if (!ev->status)
@ -3170,6 +3234,14 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb,
hci_cc_write_sc_support(hdev, skb);
break;
case HCI_OP_READ_AUTH_PAYLOAD_TO:
hci_cc_read_auth_payload_timeout(hdev, skb);
break;
case HCI_OP_WRITE_AUTH_PAYLOAD_TO:
hci_cc_write_auth_payload_timeout(hdev, skb);
break;
case HCI_OP_READ_LOCAL_VERSION:
hci_cc_read_local_version(hdev, skb);
break;