From cef952ce760a1113207b277af65a6ea2644a1b4a Mon Sep 17 00:00:00 2001 From: Andre Guedes Date: Wed, 26 Feb 2014 20:21:49 -0300 Subject: [PATCH] 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 Signed-off-by: Marcel Holtmann --- 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(¶ms->addr, addr); params->addr_type = addr_type; + + list_add(¶ms->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(¶ms->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(¶ms->list); kfree(params); -- 2.7.4