Bluetooth: Introduce "New Connection Parameter" Event

This patch introduces a new Mgmt event called "New Connection Parameter".
This event indicates to userspace the connection parameters values the
remote device requested.

The user may store these values and load them into kernel. This way, next
time a connection is established to that device, the kernel will use those
parameters values instead of the default ones.

This event is sent when the remote device requests new connection
parameters through connection parameter update procedure. This event is
not sent for slave connections.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index ba5e215a7561..93cfefa260d5 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -116,6 +116,7 @@ static const u16 mgmt_events[] = {
         MGMT_EV_NEW_CSRK,
         MGMT_EV_DEVICE_ADDED,
         MGMT_EV_DEVICE_REMOVED,
+        MGMT_EV_NEW_CONN_PARAM,
 };
 
 #define CACHE_TIMEOUT   msecs_to_jiffies(2 * 1000)
@@ -5690,6 +5691,24 @@ void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,
         mgmt_event(MGMT_EV_NEW_CSRK, hdev, &ev, sizeof(ev), NULL);
 }
 
+void mgmt_new_conn_param(struct hci_dev *hdev, bdaddr_t *bdaddr,
+                         u8 bdaddr_type, u16 min_interval, u16 max_interval,
+                         u16 latency, u16 timeout)
+{
+        struct mgmt_ev_new_conn_param ev;
+
+        memset(&ev, 0, sizeof(ev));
+        bacpy(&ev.addr.bdaddr, bdaddr);
+        ev.addr.type = link_to_bdaddr(LE_LINK, bdaddr_type);
+        ev.store_hint = 0x00;
+        ev.min_interval = cpu_to_le16(min_interval);
+        ev.max_interval = cpu_to_le16(max_interval);
+        ev.latency = cpu_to_le16(latency);
+        ev.timeout = cpu_to_le16(timeout);
+
+        mgmt_event(MGMT_EV_NEW_CONN_PARAM, hdev, &ev, sizeof(ev), NULL);
+}
+
 static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type, u8 *data,
                                   u8 data_len)
 {