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authorAndre Guedes <andre.guedes@openbossa.org>2014-02-26 20:21:47 -0300
committerMarcel Holtmann <marcel@holtmann.org>2014-02-26 19:41:34 -0800
commita4790dbd43d1617b09d57e96494fde5a4b01980a (patch)
tree9010c2aeecc9b319d5c1c31b3b5c2677946a2f9b /include
parent77a77a30ae893a63467c51e45de18d0bdfa612e4 (diff)
downloadlinux-a4790dbd43d1617b09d57e96494fde5a4b01980a.tar.bz2
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 <andre.guedes@openbossa.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'include')
-rw-r--r--include/net/bluetooth/hci_core.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index e08405d02649..617cf495a449 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);