Bluetooth: Set SMP OOB flag if OOB data is available

If we have OOB data available for the remote device in question we
should set the OOB flag appropriately in the SMP pairing request or
response.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/smp.c

@@ -57,6 +57,7 @@ enum {
 	SMP_FLAG_DEBUG_KEY,
 	SMP_FLAG_WAIT_USER,
 	SMP_FLAG_DHKEY_PENDING,
+	SMP_FLAG_OOB,
 };
 
 struct smp_chan {
@@ -562,7 +563,7 @@ static void build_pairing_cmd(struct l2cap_conn *conn,
 	struct smp_chan *smp = chan->data;
 	struct hci_conn *hcon = conn->hcon;
 	struct hci_dev *hdev = hcon->hdev;
-	u8 local_dist = 0, remote_dist = 0;
+	u8 local_dist = 0, remote_dist = 0, oob_flag = SMP_OOB_NOT_PRESENT;
 
 	if (test_bit(HCI_BONDABLE, &conn->hcon->hdev->dev_flags)) {
 		local_dist = SMP_DIST_ENC_KEY | SMP_DIST_SIGN;
@@ -578,19 +579,37 @@ static void build_pairing_cmd(struct l2cap_conn *conn,
 	if (test_bit(HCI_PRIVACY, &hdev->dev_flags))
 		local_dist |= SMP_DIST_ID_KEY;
 
-	if (test_bit(HCI_SC_ENABLED, &hdev->dev_flags)) {
-		if ((authreq & SMP_AUTH_SC) &&
-		    test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
+	if (test_bit(HCI_SC_ENABLED, &hdev->dev_flags) &&
+	    (authreq & SMP_AUTH_SC)) {
+		struct oob_data *oob_data;
+		u8 bdaddr_type;
+
+		if (test_bit(HCI_SSP_ENABLED, &hdev->dev_flags)) {
 			local_dist |= SMP_DIST_LINK_KEY;
 			remote_dist |= SMP_DIST_LINK_KEY;
 		}
+
+		if (hcon->dst_type == ADDR_LE_DEV_PUBLIC)
+			bdaddr_type = BDADDR_LE_PUBLIC;
+		else
+			bdaddr_type = BDADDR_LE_RANDOM;
+
+		oob_data = hci_find_remote_oob_data(hdev, &hcon->dst,
+						    bdaddr_type);
+		if (oob_data) {
+			set_bit(SMP_FLAG_OOB, &smp->flags);
+			oob_flag = SMP_OOB_PRESENT;
+			memcpy(smp->rrnd, oob_data->rand256, 16);
+			memcpy(smp->pcnf, oob_data->hash256, 16);
+		}
+
 	} else {
 		authreq &= ~SMP_AUTH_SC;
 	}
 
 	if (rsp == NULL) {
 		req->io_capability = conn->hcon->io_capability;
-		req->oob_flag = SMP_OOB_NOT_PRESENT;
+		req->oob_flag = oob_flag;
 		req->max_key_size = SMP_MAX_ENC_KEY_SIZE;
 		req->init_key_dist = local_dist;
 		req->resp_key_dist = remote_dist;
@@ -601,7 +620,7 @@ static void build_pairing_cmd(struct l2cap_conn *conn,
 	}
 
 	rsp->io_capability = conn->hcon->io_capability;
-	rsp->oob_flag = SMP_OOB_NOT_PRESENT;
+	rsp->oob_flag = oob_flag;
 	rsp->max_key_size = SMP_MAX_ENC_KEY_SIZE;
 	rsp->init_key_dist = req->init_key_dist & remote_dist;
 	rsp->resp_key_dist = req->resp_key_dist & local_dist;