From: Marcel Holtmann <marcel@holtmann.org>
Date: Sat, 31 Jan 2015 07:20:56 +0000 (-0800)
Subject: Bluetooth: Fix OOB data present value for BR/EDR Secure Connections
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=659c7fb08463b3dcf6aebb4daa0c5463289ccb97;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

Bluetooth: Fix OOB data present value for BR/EDR Secure Connections

When BR/EDR Secure Connections has been enabled, the OOB data present
value can take 2 additional values. The host has to clearly provide
details about if P-192 OOB data, P-256 OOB data or a combination of
P-192 and P-256 OOB data is present.

In case BR/EDR Secure Connections is not enabled or not supported,
then check that P-192 OOB data is actually present and return the
correct value based on that.

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

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 055625b7368f..af181f455f6f 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3881,8 +3881,25 @@ static u8 bredr_oob_data_present(struct hci_conn *conn)
 	     !memcmp(data->hash256, ZERO_KEY, 16)))
 		return 0x00;
 
-	if (conn->out || test_bit(HCI_CONN_REMOTE_OOB, &conn->flags))
+	if (conn->out || test_bit(HCI_CONN_REMOTE_OOB, &conn->flags)) {
+		/* When Secure Connections has been enabled, then just
+		 * return the present value stored with the OOB data. It
+		 * will contain the right information about which data
+		 * is present.
+		 */
+		if (bredr_sc_enabled(hdev))
+			return data->present;
+
+		/* When Secure Connections is not enabled or actually
+		 * not supported by the hardware, then check that if
+		 * P-192 data values are present.
+		 */
+		if (!memcmp(data->rand192, ZERO_KEY, 16) ||
+		    !memcmp(data->hash192, ZERO_KEY, 16))
+			return 0x00;
+
 		return 0x01;
+	}
 
 	return 0x00;
 }