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Bluetooth: Use the stored LTK for restabilishing security 

Now that it's possible that the exchanged key is present in
the link key list, we may be able to estabilish security with
an already existing key, without need to perform any SMP
procedure.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
This commit is contained in:
Vinicius Costa Gomes 2011-07-07 18:59:41 -03:00 committed by Gustavo F. Padovan
parent e7e62c8592
commit 02bc74556a
1 changed files with 12 additions and 0 deletions
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12
net/bluetooth/smp.c
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@ -480,6 +480,17 @@ int smp_conn_security(struct l2cap_conn *conn, __u8 sec_level)
if (hcon->link_mode & HCI_LM_MASTER) {
struct smp_cmd_pairing cp;
struct link_key *key;
key = hci_find_link_key_type(hcon->hdev, conn->dst,
HCI_LK_SMP_LTK);
if (key) {
struct key_master_id *master = (void *) key->data;
hci_le_start_enc(hcon, master->ediv, master->rand,
key->val);
goto done;
}
build_pairing_cmd(conn, &cp, NULL, authreq);
conn->preq[0] = SMP_CMD_PAIRING_REQ;
@ -495,6 +506,7 @@ int smp_conn_security(struct l2cap_conn *conn, __u8 sec_level)
smp_send_cmd(conn, SMP_CMD_SECURITY_REQ, sizeof(cp), &cp);
}
done:
hcon->pending_sec_level = sec_level;
set_bit(HCI_CONN_ENCRYPT_PEND, &hcon->pend);