Bluetooth: Track the AES-CCM encryption status of LE and BR/EDR links

When encryption for LE links has been enabled, it will always be use
AES-CCM encryption. In case of BR/EDR Secure Connections, the link
will also use AES-CCM encryption. In both cases track the AES-CCM
status in the connection flags.

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

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 2e1d184..6854384 100644 (file)
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -448,6 +448,7 @@ enum {
        HCI_CONN_MGMT_CONNECTED,
        HCI_CONN_SSP_ENABLED,
        HCI_CONN_SC_ENABLED,
+       HCI_CONN_AES_CCM,
        HCI_CONN_POWER_SAVE,
        HCI_CONN_REMOTE_OOB,
        HCI_CONN_6LOWPAN,

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 62aea2e..36c9a48 100644 (file)
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1997,8 +1997,14 @@ static void hci_encrypt_change_evt(struct hci_dev *hdev, struct sk_buff *skb)
                        conn->link_mode |= HCI_LM_AUTH;
                        conn->link_mode |= HCI_LM_ENCRYPT;
                        conn->sec_level = conn->pending_sec_level;
-               } else
+
+                       if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
+                           conn->type == LE_LINK)
+                               set_bit(HCI_CONN_AES_CCM, &conn->flags);
+               } else {
                        conn->link_mode &= ~HCI_LM_ENCRYPT;
+                       clear_bit(HCI_CONN_AES_CCM, &conn->flags);
+               }
        }
 
        clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);