Bluetooth: Move SMP LTK notification after key distribution

This patch moves the SMP Long Term Key notification over mgmt from the
hci_add_ltk function to smp.c when both sides have completed their key
distribution. This way we are also able to update the identity address
into the mgmt_new_ltk event.

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

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 8ca95e5..59ae04c 100644 (file)
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -788,9 +788,8 @@ int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8],
                             bool master);
 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
-                           u8 addr_type, u8 type, int new_key,
-                           u8 authenticated, u8 tk[16], u8 enc_size,
-                           __le16 ediv, u8 rand[8]);
+                           u8 addr_type, u8 type, u8 authenticated,
+                           u8 tk[16], u8 enc_size, __le16 ediv, u8 rand[8]);
 struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
                                     u8 addr_type, bool master);
 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type);

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 60c8752..3711c76 100644 (file)
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2762,9 +2762,8 @@ int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
 }
 
 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
-                           u8 addr_type, u8 type, int new_key,
-                           u8 authenticated, u8 tk[16], u8 enc_size,
-                           __le16 ediv, u8 rand[8])
+                           u8 addr_type, u8 type, u8 authenticated,
+                           u8 tk[16], u8 enc_size, __le16 ediv, u8 rand[8])
 {
        struct smp_ltk *key, *old_key;
        bool master = ltk_type_master(type);
@@ -2788,12 +2787,6 @@ struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
        key->type = type;
        memcpy(key->rand, rand, sizeof(key->rand));
 
-       if (!new_key)
-               return key;
-
-       if (type == HCI_SMP_LTK || type == HCI_SMP_LTK_SLAVE)
-               mgmt_new_ltk(hdev, key);
-
        return key;
 }
 

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index ad51da1..bcfc6da 100644 (file)
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -4330,9 +4330,9 @@ static int load_long_term_keys(struct sock *sk, struct hci_dev *hdev,
                else
                        type = HCI_SMP_LTK_SLAVE;
 
-               hci_add_ltk(hdev, &key->addr.bdaddr, addr_type,
-                           type, 0, key->type, key->val,
-                           key->enc_size, key->ediv, key->rand);
+               hci_add_ltk(hdev, &key->addr.bdaddr, addr_type, type,
+                           key->type, key->val, key->enc_size, key->ediv,
+                           key->rand);
        }
 
        err = cmd_complete(sk, hdev->id, MGMT_OP_LOAD_LONG_TERM_KEYS, 0,

diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index eaac54b..f05c1b7 100644 (file)
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -532,7 +532,7 @@ static void random_work(struct work_struct *work)
                       SMP_MAX_ENC_KEY_SIZE - smp->enc_key_size);
 
                hci_add_ltk(hcon->hdev, &hcon->dst, hcon->dst_type,
-                           HCI_SMP_STK_SLAVE, 0, 0, stk, smp->enc_key_size,
+                           HCI_SMP_STK_SLAVE, 0, stk, smp->enc_key_size,
                            ediv, rand);
        }
 
@@ -931,7 +931,7 @@ static int smp_cmd_master_ident(struct l2cap_conn *conn, struct sk_buff *skb)
 
        hci_dev_lock(hdev);
        authenticated = (hcon->sec_level == BT_SECURITY_HIGH);
-       ltk = hci_add_ltk(hdev, &hcon->dst, hcon->dst_type, HCI_SMP_LTK, 1,
+       ltk = hci_add_ltk(hdev, &hcon->dst, hcon->dst_type, HCI_SMP_LTK,
                          authenticated, smp->tk, smp->enc_key_size,
                          rp->ediv, rp->rand);
        smp->ltk = ltk;
@@ -1106,6 +1106,25 @@ done:
        return err;
 }
 
+static void smp_notify_keys(struct l2cap_conn *conn)
+{
+       struct smp_chan *smp = conn->smp_chan;
+       struct hci_conn *hcon = conn->hcon;
+       struct hci_dev *hdev = hcon->hdev;
+
+       if (smp->ltk) {
+               smp->ltk->bdaddr_type = hcon->dst_type;
+               bacpy(&smp->ltk->bdaddr, &hcon->dst);
+               mgmt_new_ltk(hdev, smp->ltk);
+       }
+
+       if (smp->slave_ltk) {
+               smp->slave_ltk->bdaddr_type = hcon->dst_type;
+               bacpy(&smp->slave_ltk->bdaddr, &hcon->dst);
+               mgmt_new_ltk(hdev, smp->slave_ltk);
+       }
+}
+
 int smp_distribute_keys(struct l2cap_conn *conn, __u8 force)
 {
        struct smp_cmd_pairing *req, *rsp;
@@ -1151,9 +1170,8 @@ int smp_distribute_keys(struct l2cap_conn *conn, __u8 force)
 
                authenticated = hcon->sec_level == BT_SECURITY_HIGH;
                ltk = hci_add_ltk(hcon->hdev, &hcon->dst, hcon->dst_type,
-                                 HCI_SMP_LTK_SLAVE, 1, authenticated,
-                                 enc.ltk, smp->enc_key_size, ediv,
-                                 ident.rand);
+                                 HCI_SMP_LTK_SLAVE, authenticated, enc.ltk,
+                                 smp->enc_key_size, ediv, ident.rand);
                smp->slave_ltk = ltk;
 
                ident.ediv = ediv;
@@ -1197,6 +1215,7 @@ int smp_distribute_keys(struct l2cap_conn *conn, __u8 force)
                clear_bit(HCI_CONN_LE_SMP_PEND, &conn->hcon->flags);
                cancel_delayed_work_sync(&conn->security_timer);
                set_bit(SMP_FLAG_COMPLETE, &smp->smp_flags);
+               smp_notify_keys(conn);
                smp_chan_destroy(conn);
        }