DivestOS/Patches/LineageOS-19.1/android_packages_modules_Wifi/0001-Random_MAC.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: renlord <me@renlord.com>
Date: Fri, 15 Oct 2021 19:28:34 +0530
Subject: [PATCH] add option of always randomizing MAC addresses
---
framework/api/system-current.txt | 1 +
.../java/android/net/wifi/WifiConfiguration.java | 16 ++++++++++++----
.../android/server/wifi/WifiConfigManager.java | 7 ++++++-
.../server/wifi/WifiConfigurationUtil.java | 2 +-
4 files changed, 20 insertions(+), 6 deletions(-)
diff --git a/framework/api/system-current.txt b/framework/api/system-current.txt
index dda74810f..855a5c53d 100644
--- a/framework/api/system-current.txt
+++ b/framework/api/system-current.txt
@@ -380,6 +380,7 @@ package android.net.wifi {
field @Deprecated public static final int METERED_OVERRIDE_METERED = 1; // 0x1
field @Deprecated public static final int METERED_OVERRIDE_NONE = 0; // 0x0
field @Deprecated public static final int METERED_OVERRIDE_NOT_METERED = 2; // 0x2
+ field @Deprecated public static final int RANDOMIZATION_ALWAYS = 100; // 0x64
field @Deprecated public static final int RANDOMIZATION_AUTO = 3; // 0x3
field @Deprecated public static final int RANDOMIZATION_NONE = 0; // 0x0
field @Deprecated public static final int RANDOMIZATION_NON_PERSISTENT = 2; // 0x2
diff --git a/framework/java/android/net/wifi/WifiConfiguration.java b/framework/java/android/net/wifi/WifiConfiguration.java
index 924cd3345..fa96b73c0 100644
--- a/framework/java/android/net/wifi/WifiConfiguration.java
+++ b/framework/java/android/net/wifi/WifiConfiguration.java
@@ -1641,7 +1641,8 @@ public class WifiConfiguration implements Parcelable {
RANDOMIZATION_NONE,
RANDOMIZATION_PERSISTENT,
RANDOMIZATION_NON_PERSISTENT,
- RANDOMIZATION_AUTO})
+ RANDOMIZATION_AUTO,
+ RANDOMIZATION_ALWAYS})
public @interface MacRandomizationSetting {}
/**
@@ -1672,16 +1673,23 @@ public class WifiConfiguration implements Parcelable {
@SystemApi
public static final int RANDOMIZATION_AUTO = 3;
+ /**
+ * @hide
+ * Generate a randomize MAC always
+ */
+ @SystemApi
+ public static final int RANDOMIZATION_ALWAYS = 100;
+
/**
* Level of MAC randomization for this network.
* One of {@link #RANDOMIZATION_NONE}, {@link #RANDOMIZATION_AUTO},
- * {@link #RANDOMIZATION_PERSISTENT} or {@link #RANDOMIZATION_NON_PERSISTENT}.
- * By default this field is set to {@link #RANDOMIZATION_AUTO}.
+ * {@link #RANDOMIZATION_PERSISTENT} or {@link #RANDOMIZATION_NON_PERSISTENT} or RANDOMIZATION_ALWAYS.
+ * By default this field is set to RANDOMIZATION_ALWAYS in GrapheneOS.
* @hide
*/
@SystemApi
@MacRandomizationSetting
- public int macRandomizationSetting = RANDOMIZATION_AUTO;
+ public int macRandomizationSetting = RANDOMIZATION_ALWAYS;
/**
* Randomized MAC address to use with this particular network
diff --git a/service/java/com/android/server/wifi/WifiConfigManager.java b/service/java/com/android/server/wifi/WifiConfigManager.java
index b0212133a..5f40104ce 100644
--- a/service/java/com/android/server/wifi/WifiConfigManager.java
+++ b/service/java/com/android/server/wifi/WifiConfigManager.java
@@ -431,6 +431,10 @@ public class WifiConfigManager {
return false;
}
+ if (config.macRandomizationSetting == WifiConfiguration.RANDOMIZATION_ALWAYS) {
+ return true;
+ }
+
// Use enhanced randomization if it's forced on by dev option
if (mFrameworkFacade.getIntegerSetting(mContext,
ENHANCED_MAC_RANDOMIZATION_FEATURE_FORCE_ENABLE_FLAG, 0) == 1) {
@@ -580,7 +584,8 @@ public class WifiConfigManager {
private MacAddress updateRandomizedMacIfNeeded(WifiConfiguration config) {
boolean shouldUpdateMac = config.randomizedMacExpirationTimeMs
< mClock.getWallClockMillis() || mClock.getWallClockMillis()
- - config.randomizedMacLastModifiedTimeMs >= ENHANCED_MAC_REFRESH_MS_MAX;
+ - config.randomizedMacLastModifiedTimeMs >= ENHANCED_MAC_REFRESH_MS_MAX ||
+ config.macRandomizationSetting == WifiConfiguration.RANDOMIZATION_ALWAYS;
if (!shouldUpdateMac) {
return config.getRandomizedMacAddress();
}
diff --git a/service/java/com/android/server/wifi/WifiConfigurationUtil.java b/service/java/com/android/server/wifi/WifiConfigurationUtil.java
index 5e0db72f6..f63ccb32d 100644
--- a/service/java/com/android/server/wifi/WifiConfigurationUtil.java
+++ b/service/java/com/android/server/wifi/WifiConfigurationUtil.java
@@ -225,7 +225,7 @@ public class WifiConfigurationUtil {
public static boolean hasMacRandomizationSettingsChanged(WifiConfiguration existingConfig,
WifiConfiguration newConfig) {
if (existingConfig == null) {
- return newConfig.macRandomizationSetting != WifiConfiguration.RANDOMIZATION_AUTO;
+ return newConfig.macRandomizationSetting != WifiConfiguration.RANDOMIZATION_ALWAYS;
}
return newConfig.macRandomizationSetting != existingConfig.macRandomizationSetting;
}