From d8cc34290cb74db931e0fceaf3e0ec4b8a380716 Mon Sep 17 00:00:00 2001
From: xshu <xshu@google.com>
Date: Fri, 8 Nov 2019 15:45:36 -0800
Subject: Add SSID hotlist in DeviceConfig

Reads from DeviceConfig and parses a comma separated of SSIDs.

Bug: 144172117
Test: atest FrameworksWifiTests
Test: Manually tested on device
Change-Id: I20f940b73a5b8d6818653b634e3a4e8d66ff4018
---
 .../android/server/wifi/DeviceConfigFacade.java    | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'service')

diff --git a/service/java/com/android/server/wifi/DeviceConfigFacade.java b/service/java/com/android/server/wifi/DeviceConfigFacade.java
index c5ca3c913..1c59797fe 100644
--- a/service/java/com/android/server/wifi/DeviceConfigFacade.java
+++ b/service/java/com/android/server/wifi/DeviceConfigFacade.java
@@ -19,10 +19,13 @@ package com.android.server.wifi;
 import android.content.Context;
 import android.os.Handler;
 import android.provider.DeviceConfig;
+import android.util.ArraySet;
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.wifi.R;
 
+import java.util.Collections;
+import java.util.Set;
 import java.util.concurrent.TimeUnit;
 
 /**
@@ -60,6 +63,7 @@ public class DeviceConfigFacade {
     private int mDataStallRxTputThrKbps;
     private int mDataStallTxPerThr;
     private int mDataStallCcaLevelThr;
+    private Set<String> mRandomizationFlakySsidHotlist;
 
     public DeviceConfigFacade(Context context, Handler handler, WifiMetrics wifiMetrics) {
         mContext = context;
@@ -101,6 +105,25 @@ public class DeviceConfigFacade {
         mWifiMetrics.setDataStallRxTputThrKbps(mDataStallRxTputThrKbps);
         mWifiMetrics.setDataStallTxPerThr(mDataStallTxPerThr);
         mWifiMetrics.setDataStallCcaLevelThr(mDataStallCcaLevelThr);
+
+        createUnmodifiableRandomizationFlakySsidHotlist();
+    }
+
+    private void createUnmodifiableRandomizationFlakySsidHotlist() {
+        String ssidHotlist = DeviceConfig.getString(NAMESPACE,
+                "randomization_flaky_ssid_hotlist", "");
+        mRandomizationFlakySsidHotlist = new ArraySet<String>();
+        String[] ssidHotlistArray = ssidHotlist.split(",");
+        for (int i = 0; i < ssidHotlistArray.length; i++) {
+            String cur = ssidHotlistArray[i];
+            if (cur.length() == 0) {
+                continue;
+            }
+            // Make sure the SSIDs are quoted. Server side should not quote ssids.
+            mRandomizationFlakySsidHotlist.add("\"" + cur + "\"");
+        }
+        mRandomizationFlakySsidHotlist =
+                Collections.unmodifiableSet(mRandomizationFlakySsidHotlist);
     }
 
     /**
@@ -158,4 +181,11 @@ public class DeviceConfigFacade {
     public int getDataStallCcaLevelThr() {
         return mDataStallCcaLevelThr;
     }
+
+    /**
+     * Gets the Set of SSIDs in the flaky SSID hotlist.
+     */
+    public Set<String> getRandomizationFlakySsidHotlist() {
+        return mRandomizationFlakySsidHotlist;
+    }
 }
-- 
cgit v1.2.3


From a522b345fa15716a21fd9edcf523cf3c1331dd94 Mon Sep 17 00:00:00 2001
From: xshu <xshu@google.com>
Date: Tue, 12 Nov 2019 14:04:42 -0800
Subject: Detect networks in SSID hotlist

Add infrastructure support to detect networks that are known to not
support randomized MACs.

Bug: 144172117
Test: atest FrameworksWifiTests
Test: Manually tested on device
Change-Id: Ie42ce853810aa5dfd4eef89dff281740dafaf3be
---
 service/java/com/android/server/wifi/WifiConfigManager.java | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'service')

diff --git a/service/java/com/android/server/wifi/WifiConfigManager.java b/service/java/com/android/server/wifi/WifiConfigManager.java
index 0b4ea8811..18b5562b3 100644
--- a/service/java/com/android/server/wifi/WifiConfigManager.java
+++ b/service/java/com/android/server/wifi/WifiConfigManager.java
@@ -1674,6 +1674,19 @@ public class WifiConfigManager {
         return false;
     }
 
+    /**
+     * Check whether a network belong to a known list of networks that may not support randomized
+     * MAC.
+     * @param networkId
+     * @return true if the network is in the hotlist and MAC randomization is enabled.
+     */
+    public boolean isInFlakyRandomizationSsidHotlist(int networkId) {
+        WifiConfiguration config = getConfiguredNetwork(networkId);
+        return config != null
+                && config.macRandomizationSetting == WifiConfiguration.RANDOMIZATION_PERSISTENT
+                && mDeviceConfigFacade.getRandomizationFlakySsidHotlist().contains(config.SSID);
+    }
+
     /**
      * Helper method to mark a network enabled for network selection.
      */
-- 
cgit v1.2.3