Bluetooth: Add SMP-internal timeout callback
This patch adds an SMP-internal timeout callback to remove the depenency on (the soon to be removed) l2cap_conn->security_timer. The behavior is the same as with l2cap_conn->security_timer except that the new l2cap_conn_shutdown() public function is used instead of the L2CAP core internal l2cap_conn_del(). Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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@ -44,7 +44,9 @@ enum {
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};
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struct smp_chan {
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struct l2cap_conn *conn;
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struct l2cap_conn *conn;
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struct delayed_work security_timer;
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u8 preq[7]; /* SMP Pairing Request */
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u8 prsp[7]; /* SMP Pairing Response */
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u8 prnd[16]; /* SMP Pairing Random (local) */
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@ -251,6 +253,7 @@ static int smp_s1(struct smp_chan *smp, u8 k[16], u8 r1[16], u8 r2[16],
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static void smp_send_cmd(struct l2cap_conn *conn, u8 code, u16 len, void *data)
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{
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struct l2cap_chan *chan = conn->smp;
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struct smp_chan *smp;
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struct kvec iv[2];
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struct msghdr msg;
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@ -272,8 +275,14 @@ static void smp_send_cmd(struct l2cap_conn *conn, u8 code, u16 len, void *data)
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l2cap_chan_send(chan, &msg, 1 + len);
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cancel_delayed_work_sync(&conn->security_timer);
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schedule_delayed_work(&conn->security_timer, SMP_TIMEOUT);
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if (!chan->data)
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return;
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smp = chan->data;
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cancel_delayed_work_sync(&smp->security_timer);
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if (test_bit(HCI_CONN_LE_SMP_PEND, &conn->hcon->flags))
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schedule_delayed_work(&smp->security_timer, SMP_TIMEOUT);
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}
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static __u8 authreq_to_seclevel(__u8 authreq)
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@ -359,6 +368,8 @@ static u8 check_enc_key_size(struct l2cap_conn *conn, __u8 max_key_size)
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static void smp_failure(struct l2cap_conn *conn, u8 reason)
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{
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struct hci_conn *hcon = conn->hcon;
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struct l2cap_chan *chan = conn->smp;
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struct smp_chan *smp;
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if (reason)
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smp_send_cmd(conn, SMP_CMD_PAIRING_FAIL, sizeof(reason),
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@ -368,7 +379,12 @@ static void smp_failure(struct l2cap_conn *conn, u8 reason)
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mgmt_auth_failed(hcon->hdev, &hcon->dst, hcon->type, hcon->dst_type,
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HCI_ERROR_AUTH_FAILURE);
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cancel_delayed_work_sync(&conn->security_timer);
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if (!chan->data)
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return;
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smp = chan->data;
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cancel_delayed_work_sync(&smp->security_timer);
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if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->flags))
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smp_chan_destroy(conn);
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@ -749,7 +765,7 @@ static int smp_distribute_keys(struct l2cap_conn *conn)
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return 0;
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clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->flags);
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cancel_delayed_work_sync(&conn->security_timer);
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cancel_delayed_work_sync(&smp->security_timer);
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set_bit(SMP_FLAG_COMPLETE, &smp->flags);
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smp_notify_keys(conn);
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@ -758,6 +774,17 @@ static int smp_distribute_keys(struct l2cap_conn *conn)
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return 0;
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}
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static void smp_timeout(struct work_struct *work)
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{
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struct smp_chan *smp = container_of(work, struct smp_chan,
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security_timer.work);
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struct l2cap_conn *conn = smp->conn;
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BT_DBG("conn %p", conn);
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l2cap_conn_shutdown(conn, ETIMEDOUT);
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}
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static struct smp_chan *smp_chan_create(struct l2cap_conn *conn)
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{
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struct l2cap_chan *chan = conn->smp;
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@ -780,6 +807,8 @@ static struct smp_chan *smp_chan_create(struct l2cap_conn *conn)
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smp->conn = conn;
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chan->data = smp;
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INIT_DELAYED_WORK(&smp->security_timer, smp_timeout);
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hci_conn_hold(conn->hcon);
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return smp;
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@ -1479,11 +1508,12 @@ done:
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static void smp_teardown_cb(struct l2cap_chan *chan, int err)
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{
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struct l2cap_conn *conn = chan->conn;
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struct smp_chan *smp = chan->data;
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BT_DBG("chan %p", chan);
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if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &conn->hcon->flags)) {
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cancel_delayed_work_sync(&conn->security_timer);
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cancel_delayed_work_sync(&smp->security_timer);
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smp_chan_destroy(conn);
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}
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@ -1493,6 +1523,7 @@ static void smp_teardown_cb(struct l2cap_chan *chan, int err)
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static void smp_resume_cb(struct l2cap_chan *chan)
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{
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struct smp_chan *smp = chan->data;
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struct l2cap_conn *conn = chan->conn;
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struct hci_conn *hcon = conn->hcon;
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@ -1500,7 +1531,9 @@ static void smp_resume_cb(struct l2cap_chan *chan)
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if (test_bit(HCI_CONN_ENCRYPT, &hcon->flags))
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smp_distribute_keys(conn);
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cancel_delayed_work(&conn->security_timer);
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if (smp)
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cancel_delayed_work(&smp->security_timer);
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}
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static void smp_ready_cb(struct l2cap_chan *chan)
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@ -1521,9 +1554,10 @@ static int smp_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
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err = smp_sig_channel(chan, skb);
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if (err) {
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struct l2cap_conn *conn = chan->conn;
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struct smp_chan *smp = chan->data;
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cancel_delayed_work_sync(&conn->security_timer);
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if (smp)
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cancel_delayed_work_sync(&smp->security_timer);
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l2cap_conn_shutdown(chan->conn, -err);
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}
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