From 761fec1b48fa7329dc40713ccfe0637dd9dd20a9 Mon Sep 17 00:00:00 2001
From: xshu <xshu@google.com>
Date: Wed, 22 Apr 2020 18:36:54 -0700
Subject: Randomize sta MAC address upon start

This is needed to prevent factory MAC leakage for features like DPP,
which at some point sends packets using the currently programed MAC.

Bug: 154393320
Test: com.android.server.wifi
Change-Id: I3c5a388545e049daa8430af5010f4b2386210ac9
---
 service/java/com/android/server/wifi/ClientModeImpl.java | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'service')

diff --git a/service/java/com/android/server/wifi/ClientModeImpl.java b/service/java/com/android/server/wifi/ClientModeImpl.java
index 00e02df4a..7d89505e3 100644
--- a/service/java/com/android/server/wifi/ClientModeImpl.java
+++ b/service/java/com/android/server/wifi/ClientModeImpl.java
@@ -67,6 +67,7 @@ import android.net.shared.Inet4AddressUtils;
 import android.net.shared.Layer2Information;
 import android.net.shared.ProvisioningConfiguration;
 import android.net.shared.ProvisioningConfiguration.ScanResultInfo;
+import android.net.util.MacAddressUtils;
 import android.net.util.NetUtils;
 import android.net.wifi.IActionListener;
 import android.net.wifi.INetworkRequestMatchCallback;
@@ -3549,6 +3550,7 @@ public class ClientModeImpl extends StateMachine {
         mLastSubId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;
         mLastSimBasedConnectionCarrierName = null;
         mLastSignalLevel = -1;
+        mWifiNative.setMacAddress(mInterfaceName, MacAddressUtils.createRandomUnicastAddress());
         mWifiInfo.setMacAddress(mWifiNative.getMacAddress(mInterfaceName));
         // TODO: b/79504296 This broadcast has been deprecated and should be removed
         sendSupplicantConnectionChangedBroadcast(true);
-- 
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