Bluetooth: Implement link key handling for the management interface
This patch adds a management commands to feed the kernel with all stored
link keys as well as remove specific ones or all of them. Once the
load_keys command has been called the kernel takes over link key
replies. A new_key event is also added to inform userspace of newly
created link keys that should be stored permanently.
Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index c69ee44..80ffd3a 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1810,13 +1810,60 @@
static inline void hci_link_key_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
+ struct hci_ev_link_key_req *ev = (void *) skb->data;
+ struct hci_cp_link_key_reply cp;
+ struct hci_conn *conn;
+ struct link_key *key;
+
BT_DBG("%s", hdev->name);
+
+ if (!test_bit(HCI_LINK_KEYS, &hdev->flags))
+ return;
+
+ hci_dev_lock(hdev);
+
+ key = hci_find_link_key(hdev, &ev->bdaddr);
+ if (!key) {
+ BT_DBG("%s link key not found for %s", hdev->name,
+ batostr(&ev->bdaddr));
+ goto not_found;
+ }
+
+ BT_DBG("%s found key type %u for %s", hdev->name, key->type,
+ batostr(&ev->bdaddr));
+
+ if (!test_bit(HCI_DEBUG_KEYS, &hdev->flags) && key->type == 0x03) {
+ BT_DBG("%s ignoring debug key", hdev->name);
+ goto not_found;
+ }
+
+ conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
+
+ if (key->type == 0x04 && conn && conn->auth_type != 0xff &&
+ (conn->auth_type & 0x01)) {
+ BT_DBG("%s ignoring unauthenticated key", hdev->name);
+ goto not_found;
+ }
+
+ bacpy(&cp.bdaddr, &ev->bdaddr);
+ memcpy(cp.link_key, key->val, 16);
+
+ hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
+
+ hci_dev_unlock(hdev);
+
+ return;
+
+not_found:
+ hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
+ hci_dev_unlock(hdev);
}
static inline void hci_link_key_notify_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_ev_link_key_notify *ev = (void *) skb->data;
struct hci_conn *conn;
+ u8 pin_len = 0;
BT_DBG("%s", hdev->name);
@@ -1829,6 +1876,10 @@
hci_conn_put(conn);
}
+ if (test_bit(HCI_LINK_KEYS, &hdev->flags))
+ hci_add_link_key(hdev, 1, &ev->bdaddr, ev->link_key,
+ ev->key_type, pin_len);
+
hci_dev_unlock(hdev);
}