mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-07-01 17:11:41 +00:00
71 lines
3.0 KiB
Diff
71 lines
3.0 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 | 29 +++++++++++++++++++++++++++-
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1 file changed, 28 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 c88b6532..c9f65d0d 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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@@ -75,6 +75,9 @@ import android.net.networkstack.aidl.dhcp.DhcpOption;
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import android.net.util.HostnameTransliterator;
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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.Build;
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import android.os.Handler;
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import android.os.Message;
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@@ -116,6 +119,7 @@ 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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@@ -1250,7 +1254,7 @@ 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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@@ -1284,6 +1288,29 @@ public class DhcpClient extends StateMachine {
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return true;
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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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private void receiveOfferOrAckPacket(final DhcpPacket packet, final boolean acceptRapidCommit) {
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if (!isValidPacket(packet)) return;
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