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Bluetooth: Use duplicate filtering policy in passive scanning

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To limit the device_found function calls, passive scanning can
take advantage of Filter_Duplicates feature. For now, the stack
will be informed only if some new device will be found.

This solution requires a check if scan filter is used while adding
new address to connect to (bt_connect_le). If filter duplicates
is used (by active scan or passive scan), the scan should be
restarted to refresh scan results.

Change-Id: Ibf539e648288fdcd7a8119ec364cff2c97e4aab8
Signed-off-by: Mariusz Skamra <mariusz.skamra@tieto.com>
This commit is contained in:
Mariusz Skamra 2015-07-06 12:00:04 +02:00 • committed by Anas Nashif
commit e6d8bc3a59
1 changed files with 14 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

17
net/bluetooth/hci_core.c
View file

@ -415,6 +415,7 @@ static void hci_reset_complete(struct bt_buf *buf)
scan_dev_found_cb = NULL;
dev.scan_enable = BT_LE_SCAN_DISABLE;
dev.scan_filter = BT_LE_SCAN_FILTER_DUP_ENABLE;
}
static void hci_cmd_done(uint16_t opcode, uint8_t status, struct bt_buf *buf)
@ -700,8 +701,7 @@ static void trigger_scan(void)
bt_conn_put(conn);
bt_hci_start_scanning(BT_LE_SCAN_PASSIVE,
BT_LE_SCAN_FILTER_DUP_DISABLE);
bt_hci_start_scanning(BT_LE_SCAN_PASSIVE, dev.scan_filter);
}
static void le_conn_complete(struct bt_buf *buf)
@ -1501,6 +1501,8 @@ int bt_stop_scanning(void)
}
scan_dev_found_cb = NULL;
dev.scan_filter = BT_LE_SCAN_FILTER_DUP_ENABLE;
trigger_scan();
return 0;
@ -1532,6 +1534,7 @@ int bt_hci_le_conn_update(uint16_t handle, uint16_t min, uint16_t max,
struct bt_conn *bt_connect_le(const bt_addr_le_t *peer)
{
struct bt_conn *conn;
int err = 0;
conn = bt_conn_lookup_addr_le(peer);
if (conn) {
@ -1552,7 +1555,15 @@ struct bt_conn *bt_connect_le(const bt_addr_le_t *peer)
}
bt_conn_set_state(conn, BT_CONN_CONNECT_SCAN);
trigger_scan();
/* Restart scanning if duplicate filtering feature is used */
if (dev.scan_enable && dev.scan_filter) {
err = bt_hci_stop_scanning();
}
if (!err) {
trigger_scan();
}
return bt_conn_get(conn);