Bluetooth: Add support for Local OOB Extended Data Update events

When a different user requests a new set of local out-of-band data, then
inform all previous users that the data has been updated. To limit the
scope of users, the updates are limited to previous users. If a user has
never requested out-of-band data, it will also not see the update.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 7fa3c4b8384b..72e41d29e301 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -133,6 +133,7 @@ static const u16 mgmt_events[] = {
         MGMT_EV_NEW_CONFIG_OPTIONS,
         MGMT_EV_EXT_INDEX_ADDED,
         MGMT_EV_EXT_INDEX_REMOVED,
+        MGMT_EV_LOCAL_OOB_DATA_UPDATED,
 };
 
 #define CACHE_TIMEOUT   msecs_to_jiffies(2 * 1000)
@@ -262,6 +263,13 @@ static int mgmt_index_event(u16 event, struct hci_dev *hdev, void *data,
                                flag, NULL);
 }
 
+static int mgmt_limited_event(u16 event, struct hci_dev *hdev, void *data,
+                              u16 len, int flag, struct sock *skip_sk)
+{
+        return mgmt_send_event(event, hdev, HCI_CHANNEL_CONTROL, data, len,
+                               flag, skip_sk);
+}
+
 static int mgmt_generic_event(u16 event, struct hci_dev *hdev, void *data,
                               u16 len, struct sock *skip_sk)
 {
@@ -6387,8 +6395,16 @@ static int read_local_oob_ext_data(struct sock *sk, struct hci_dev *hdev,
 
         hci_dev_unlock(hdev);
 
+        hci_sock_set_flag(sk, HCI_MGMT_OOB_DATA_EVENTS);
+
         err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_LOCAL_OOB_EXT_DATA,
                                 MGMT_STATUS_SUCCESS, rp, sizeof(*rp) + eir_len);
+        if (err < 0)
+                goto done;
+
+        err = mgmt_limited_event(MGMT_EV_LOCAL_OOB_DATA_UPDATED, hdev,
+                                 rp, sizeof(*rp) + eir_len,
+                                 HCI_MGMT_OOB_DATA_EVENTS, sk);
 
 done:
         kfree(rp);