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authorAndre Guedes <andre.guedes@openbossa.org>2014-02-26 20:21:48 -0300
committerMarcel Holtmann <marcel@holtmann.org>2014-02-26 19:41:34 -0800
commit9fcb18ef3acb51e54b6bca6d2d803676ac86813d (patch)
treec19f7f9d5fcca619785894898fb08522bb2b95e0 /net
parenta4790dbd43d1617b09d57e96494fde5a4b01980a (diff)
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 <andre.guedes@openbossa.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net')
-rw-r--r--net/bluetooth/hci_core.c11
-rw-r--r--net/bluetooth/hci_event.c18
2 files changed, 25 insertions, 4 deletions
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 9a08f341f0a4..f4224dc58e4d 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 b6631d7e2ddf..46da8b6f4368 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);