mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
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72 lines
2.9 KiB
Diff
72 lines
2.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Pratyush <39559233+empratyush@users.noreply.github.com>
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Date: Thu, 20 May 2021 13:21:31 +0530
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Subject: [PATCH] avoid reusing DHCP state for full MAC randomization
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---
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src/android/net/dhcp/DhcpClient.java | 30 +++++++++++++++++++++++++++-
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1 file changed, 29 insertions(+), 1 deletion(-)
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diff --git a/src/android/net/dhcp/DhcpClient.java b/src/android/net/dhcp/DhcpClient.java
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index c45fc82..b62239c 100644
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--- a/src/android/net/dhcp/DhcpClient.java
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+++ b/src/android/net/dhcp/DhcpClient.java
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@@ -60,6 +60,9 @@ import android.net.metrics.IpConnectivityLog;
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import android.net.util.InterfaceParams;
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import android.net.util.NetworkStackUtils;
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import android.net.util.SocketUtils;
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+import android.net.wifi.WifiConfiguration;
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+import android.net.wifi.WifiInfo;
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+import android.net.wifi.WifiManager;
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import android.os.Message;
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import android.os.SystemClock;
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import android.system.ErrnoException;
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@@ -84,6 +87,8 @@ import java.net.SocketAddress;
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import java.net.SocketException;
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import java.nio.ByteBuffer;
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import java.util.Arrays;
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+import java.util.ArrayList;
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+import java.util.List;
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import java.util.Random;
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/**
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@@ -917,7 +922,7 @@ public class DhcpClient extends StateMachine {
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+ " lease expiry: " + attributes.assignedV4AddressExpiry
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+ " current time: " + currentTime);
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}
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- if (currentTime >= attributes.assignedV4AddressExpiry) {
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+ if (currentTime >= attributes.assignedV4AddressExpiry || shouldAvoidStateReuse()) {
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// Lease has expired.
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transitionTo(mDhcpInitState);
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return HANDLED;
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@@ -941,6 +946,29 @@ public class DhcpClient extends StateMachine {
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}
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}
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+ private static final int RANDOMIZATION_ALWAYS = 100;
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+
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+ private boolean shouldAvoidStateReuse() {
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+ try {
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+ WifiManager wifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
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+ WifiInfo wifiInfo = wifiManager.getConnectionInfo();
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+ if (wifiInfo != null) {
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+ int connectedNetworkId = wifiInfo.getNetworkId();
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+ List<WifiConfiguration> configurationList = wifiManager.getConfiguredNetworks();
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+ for (WifiConfiguration configuration : configurationList){
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+ if (configuration.networkId == connectedNetworkId){
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+ return configuration.macRandomizationSetting == RANDOMIZATION_ALWAYS;
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+ }
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+ }
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+ }
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+ } catch (Exception e) {
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+ loge(e.getLocalizedMessage(), e);
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+ }
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+
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+ loge("ConfiguredNetworks should contain Connected network id config");
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+ return true;
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+ }
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+
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class DhcpInitState extends PacketRetransmittingState {
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public DhcpInitState() {
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super();
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