From: Anderson Briglia <anderson.briglia@xxxxxxxxxxxxx>
This patch implements Enable RSSI Monitor Management command. This
command is responsible to add monitors into a list. This list stores all
RSSI monitors, one for each monitored connection.
Signed-off-by: Anderson Briglia <anderson.briglia@xxxxxxxxxxxxx>
---
include/net/bluetooth/hci_core.h | 2 +
net/bluetooth/hci_core.c | 2 +
net/bluetooth/mgmt.c | 84 +++++++++++++++++++++++++++++++++++++-
3 files changed, 87 insertions(+), 1 deletions(-)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 1bc1c3a..b1e3e615 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -211,6 +211,8 @@ struct hci_dev {
struct timer_list le_scan_timer;
+ struct list_head rssi_monitors;
+
struct hci_dev_stats stat;
struct sk_buff_head driver_init;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 8f9ed8c..52414d4 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1521,6 +1521,8 @@ int hci_register_dev(struct hci_dev *hdev)
setup_timer(&hdev->le_scan_timer, hci_disable_le_scan,
(unsigned long) hdev);
+ INIT_LIST_HEAD(&hdev->rssi_monitors);
+
INIT_WORK(&hdev->power_on, hci_power_on);
INIT_WORK(&hdev->power_off, hci_power_off);
setup_timer(&hdev->off_timer, hci_auto_off, (unsigned long) hdev);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 36ed168..410f614 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -55,6 +55,14 @@ struct pending_cmd {
static LIST_HEAD(cmd_list);
+struct rssi_monitor {
+ struct list_head list;
+ bdaddr_t bdaddr;
+ s8 low_trigger;
+ s8 high_trigger;
+ u8 last_alert;
+};
+
static int cmd_status(struct sock *sk, u16 index, u16 cmd, u8 status)
{
struct sk_buff *skb;
@@ -1884,12 +1892,86 @@ static int unblock_device(struct sock *sk, u16 index, unsigned char *data,
return err;
}
+static struct rssi_monitor *rssi_monitor_find(u16 index, bdaddr_t *bdaddr)
+{
+ struct rssi_monitor *tmp, *rm;
+ struct hci_dev *hdev;
+
+ hdev = hci_dev_get(index);
+ if (!hdev)
+ return NULL;
+
+ rm = NULL;
+
+ list_for_each_entry(tmp, &hdev->rssi_monitors, list) {
+ if (bacmp(&tmp->bdaddr, bdaddr) == 0) {
+ rm = tmp;
+ break;
+ }
+ }
+
+ hci_dev_put(hdev);
+
+ return rm;
+}
+
+static int rssi_check_trigger_values(s8 low_trigger, s8 high_trigger)
+{
+ if (low_trigger < high_trigger ||
+ ((high_trigger < -127 || low_trigger > 128)))
+ return -EINVAL;
+
+ return 0;
+}
+
+static int rssi_monitor_add(u16 index, bdaddr_t *bdaddr, s8 low_trigger,
+ s8 high_trigger)
+{
+ struct rssi_monitor *rm;
+ struct hci_dev *hdev;
+
+ if (rssi_check_trigger_values(low_trigger, high_trigger))
+ return -EINVAL;
+
+ if (rssi_monitor_find(index, bdaddr))
+ return -EEXIST;
+
+ rm = kzalloc(sizeof(*rm), GFP_ATOMIC);
+ if (!rm)
+ return -ENOMEM;
+
+ bacpy(&rm->bdaddr, bdaddr);
+ rm->low_trigger = low_trigger;
+ rm->high_trigger = high_trigger;
+
+ hdev = hci_dev_get(index);
+ if (!hdev) {
+ kfree(rm);
+ return -EINVAL;
+ }
+
+ list_add(&rm->list, &hdev->rssi_monitors);
+
+ hci_dev_put(hdev);
+
+ return 0;
+}
+
static int enable_rssi_monitor(struct sock *sk, u16 index,
unsigned char *data, u16 len)
{
+ struct mgmt_cp_enable_rssi_monitor *cp;
+
BT_DBG("hci%u", index);
- return -ENOSYS;
+ cp = (void *) data;
+
+ if (len != sizeof(*cp))
+ return cmd_status(sk, index,
+ MGMT_OP_ENABLE_RSSI_MONITOR, EINVAL);
+
+ return rssi_monitor_add(index, &cp->bdaddr,
+ cp->low_alert_trigger, cp->high_alert_trigger);
}
static int disable_rssi_monitor(struct sock *sk, u16 index,
--
1.7.4.1
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