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Bluetooth: Add support for encryption key refresh

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With LE/SMP the completion of a security level elavation from medium to
high is indicated by a HCI Encryption Key Refresh Complete event. The
necessary behavior upon receiving this event is a mix of what's done for
auth_complete and encryption_change, which is also where most of the
event handling code has been copied from.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
This commit is contained in:
Johan Hedberg 2012-06-08 23:31:13 +08:00 • committed by Gustavo Padovan
commit 1c2e004183
2 changed files with 54 additions and 0 deletions
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6
include/net/bluetooth/hci.h
View file

@ -1144,6 +1144,12 @@ struct extended_inquiry_info {
__u8 data[240];
} __packed;
#define HCI_EV_KEY_REFRESH_COMPLETE 0x30
struct hci_ev_key_refresh_complete {
__u8 status;
__le16 handle;
} __packed;
#define HCI_EV_IO_CAPA_REQUEST 0x31
struct hci_ev_io_capa_request {
bdaddr_t bdaddr;

48
net/bluetooth/hci_event.c
View file

@ -3043,6 +3043,50 @@ static inline void hci_extended_inquiry_result_evt(struct hci_dev *hdev, struct
hci_dev_unlock(hdev);
}
static void hci_key_refresh_complete_evt(struct hci_dev *hdev,
struct sk_buff *skb)
{
struct hci_ev_key_refresh_complete *ev = (void *) skb->data;
struct hci_conn *conn;
BT_DBG("%s status %u handle %u", hdev->name, ev->status,
__le16_to_cpu(ev->handle));
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
if (!conn)
goto unlock;
if (!ev->status)
conn->sec_level = conn->pending_sec_level;
clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
if (ev->status && conn->state == BT_CONNECTED) {
hci_acl_disconn(conn, HCI_ERROR_AUTH_FAILURE);
hci_conn_put(conn);
goto unlock;
}
if (conn->state == BT_CONFIG) {
if (!ev->status)
conn->state = BT_CONNECTED;
hci_proto_connect_cfm(conn, ev->status);
hci_conn_put(conn);
} else {
hci_auth_cfm(conn, ev->status);
hci_conn_hold(conn);
conn->disc_timeout = HCI_DISCONN_TIMEOUT;
hci_conn_put(conn);
}
unlock:
hci_dev_unlock(hdev);
}
static inline u8 hci_get_auth_req(struct hci_conn *conn)
{
/* If remote requests dedicated bonding follow that lead */
@ -3559,6 +3603,10 @@ void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
hci_extended_inquiry_result_evt(hdev, skb);
break;
case HCI_EV_KEY_REFRESH_COMPLETE:
hci_key_refresh_complete_evt(hdev, skb);
break;
case HCI_EV_IO_CAPA_REQUEST:
hci_io_capa_request_evt(hdev, skb);
break;