Bluetooth: Add SMP flag for SC and set it when necessary.

This patch adds a new SMP flag for tracking whether Secure Connections
is in use and sets the flag when both remote and local side have elected
to use Secure Connections.

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

diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index bfa839e..3808ade 100644 (file)
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -45,6 +45,7 @@ enum {
        SMP_FLAG_MITM_AUTH,
        SMP_FLAG_COMPLETE,
        SMP_FLAG_INITIATOR,
+       SMP_FLAG_SC,
 };
 
 struct smp_chan {
@@ -973,6 +974,9 @@ static u8 smp_cmd_pairing_req(struct l2cap_conn *conn, struct sk_buff *skb)
 
        build_pairing_cmd(conn, req, &rsp, auth);
 
+       if (rsp.auth_req & SMP_AUTH_SC)
+               set_bit(SMP_FLAG_SC, &smp->flags);
+
        key_size = min(req->max_key_size, rsp.max_key_size);
        if (check_enc_key_size(conn, key_size))
                return SMP_ENC_KEY_SIZE;
@@ -1020,6 +1024,9 @@ static u8 smp_cmd_pairing_rsp(struct l2cap_conn *conn, struct sk_buff *skb)
 
        auth = rsp->auth_req & AUTH_REQ_MASK(hdev);
 
+       if ((req->auth_req & SMP_AUTH_SC) && (auth & SMP_AUTH_SC))
+               set_bit(SMP_FLAG_SC, &smp->flags);
+
        /* If we need MITM check that it can be achieved */
        if (conn->hcon->pending_sec_level >= BT_SECURITY_HIGH) {
                u8 method;