commit 94b1fc92cd7cf550460ffd4bcc08c2707564aa49
author Marcel Holtmann <marcel@holtmann.org> Sun Feb 23 20:25:54 2014 -0800
committer Johan Hedberg <johan.hedberg@intel.com> Mon Feb 24 08:45:58 2014 +0200
tree 6288fa61c03d3139540e007ccdb2fa6c9d30dbbf
parent ac345813c4ac5a0e66261e9812f0fe94729c0eb2

Bluetooth: Use unresolvable private address for active scanning

When running active scanning during LE discovery, do not reveal the own
identity to the peer devices. In case LE privacy has been enabled, then
a resolvable private address is used. If the LE privacy option is off,
then use an unresolvable private address.

The public address or static random address is never used in active
scanning anymore. This ensures that scan request are send using a
random address.

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

net/bluetooth/mgmt.c

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 37305fa..5d309d4 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -844,7 +844,7 @@
 
 	memset(&cp, 0, sizeof(cp));
 
-	if (hci_update_random_address(req, &own_addr_type) < 0)
+	if (hci_update_random_address(req, false, &own_addr_type) < 0)
 		return;
 
 	cp.min_interval = __constant_cpu_to_le16(0x0800);
@@ -3389,7 +3389,11 @@
 
 		memset(&param_cp, 0, sizeof(param_cp));
 
-		err = hci_update_random_address(&req, &own_addr_type);
+		/* All active scans will be done with either a resolvable
+		 * private address (when privacy feature has been enabled)
+		 * or unresolvable private address.
+		 */
+		err = hci_update_random_address(&req, true, &own_addr_type);
 		if (err < 0) {
 			err = cmd_status(sk, hdev->id, MGMT_OP_START_DISCOVERY,
 					 MGMT_STATUS_FAILED);