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Commit b68fda68 authored by Johan Hedberg's avatar Johan Hedberg Committed by Marcel Holtmann
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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: default avatarJohan Hedberg <johan.hedberg@intel.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 8ae9b984

net/bluetooth/smp.c

+43 −9
Original line number Diff line number Diff line
@@ -45,6 +45,8 @@ enum { 


struct smp_chan {

	struct l2cap_conn	*conn;

	struct delayed_work	security_timer;



	u8		preq[7]; /* SMP Pairing Request */

	u8		prsp[7]; /* SMP Pairing Response */

	u8		prnd[16]; /* SMP Pairing Random (local) */
@@ -251,6 +253,7 @@ static int smp_s1(struct smp_chan *smp, u8 k[16], u8 r1[16], u8 r2[16], 
static void smp_send_cmd(struct l2cap_conn *conn, u8 code, u16 len, void *data)

{

	struct l2cap_chan *chan = conn->smp;

	struct smp_chan *smp;

	struct kvec iv[2];

	struct msghdr msg;
@@ -272,8 +275,14 @@ static void smp_send_cmd(struct l2cap_conn *conn, u8 code, u16 len, void *data) 


	l2cap_chan_send(chan, &msg, 1 + len);



	cancel_delayed_work_sync(&conn->security_timer);

	schedule_delayed_work(&conn->security_timer, SMP_TIMEOUT);

	if (!chan->data)

		return;



	smp = chan->data;



	cancel_delayed_work_sync(&smp->security_timer);

	if (test_bit(HCI_CONN_LE_SMP_PEND, &conn->hcon->flags))

		schedule_delayed_work(&smp->security_timer, SMP_TIMEOUT);

}



static __u8 authreq_to_seclevel(__u8 authreq)
@@ -359,6 +368,8 @@ static u8 check_enc_key_size(struct l2cap_conn *conn, __u8 max_key_size) 
static void smp_failure(struct l2cap_conn *conn, u8 reason)

{

	struct hci_conn *hcon = conn->hcon;

	struct l2cap_chan *chan = conn->smp;

	struct smp_chan *smp;



	if (reason)

		smp_send_cmd(conn, SMP_CMD_PAIRING_FAIL, sizeof(reason),
@@ -368,7 +379,12 @@ static void smp_failure(struct l2cap_conn *conn, u8 reason) 
	mgmt_auth_failed(hcon->hdev, &hcon->dst, hcon->type, hcon->dst_type,

			 HCI_ERROR_AUTH_FAILURE);



	cancel_delayed_work_sync(&conn->security_timer);

	if (!chan->data)

		return;



	smp = chan->data;



	cancel_delayed_work_sync(&smp->security_timer);



	if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->flags))

		smp_chan_destroy(conn);
@@ -749,7 +765,7 @@ static int smp_distribute_keys(struct l2cap_conn *conn) 
		return 0;



	clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->flags);

	cancel_delayed_work_sync(&conn->security_timer);

	cancel_delayed_work_sync(&smp->security_timer);

	set_bit(SMP_FLAG_COMPLETE, &smp->flags);

	smp_notify_keys(conn);
@@ -758,6 +774,17 @@ static int smp_distribute_keys(struct l2cap_conn *conn) 
	return 0;

}



static void smp_timeout(struct work_struct *work)

{

	struct smp_chan *smp = container_of(work, struct smp_chan,

					    security_timer.work);

	struct l2cap_conn *conn = smp->conn;



	BT_DBG("conn %p", conn);



	l2cap_conn_shutdown(conn, ETIMEDOUT);

}



static struct smp_chan *smp_chan_create(struct l2cap_conn *conn)

{

	struct l2cap_chan *chan = conn->smp;
@@ -780,6 +807,8 @@ static struct smp_chan *smp_chan_create(struct l2cap_conn *conn) 
	smp->conn = conn;

	chan->data = smp;



	INIT_DELAYED_WORK(&smp->security_timer, smp_timeout);



	hci_conn_hold(conn->hcon);



	return smp;
@@ -1479,11 +1508,12 @@ static int smp_sig_channel(struct l2cap_chan *chan, struct sk_buff *skb) 
static void smp_teardown_cb(struct l2cap_chan *chan, int err)

{

	struct l2cap_conn *conn = chan->conn;

	struct smp_chan *smp = chan->data;



	BT_DBG("chan %p", chan);



	if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &conn->hcon->flags)) {

		cancel_delayed_work_sync(&conn->security_timer);

		cancel_delayed_work_sync(&smp->security_timer);

		smp_chan_destroy(conn);

	}
@@ -1493,6 +1523,7 @@ static void smp_teardown_cb(struct l2cap_chan *chan, int err) 


static void smp_resume_cb(struct l2cap_chan *chan)

{

	struct smp_chan *smp = chan->data;

	struct l2cap_conn *conn = chan->conn;

	struct hci_conn *hcon = conn->hcon;
@@ -1500,7 +1531,9 @@ static void smp_resume_cb(struct l2cap_chan *chan) 


	if (test_bit(HCI_CONN_ENCRYPT, &hcon->flags))

		smp_distribute_keys(conn);

	cancel_delayed_work(&conn->security_timer);



	if (smp)

		cancel_delayed_work(&smp->security_timer);

}



static void smp_ready_cb(struct l2cap_chan *chan)
@@ -1521,9 +1554,10 @@ static int smp_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb) 


	err = smp_sig_channel(chan, skb);

	if (err) {

		struct l2cap_conn *conn = chan->conn;

		struct smp_chan *smp = chan->data;



		cancel_delayed_work_sync(&conn->security_timer);

		if (smp)

			cancel_delayed_work_sync(&smp->security_timer);



		l2cap_conn_shutdown(chan->conn, -err);

	}