Support enhanced MAC randomization Passpoint

Check the whitelist for FQDN if the network is passpoint.

Bug: 151373955
Test: atest com.android.server.wifi
Change-Id: I75cacbfd7ac9d838a112b20740d81731b6d4634e

2 files changed, 32 insertions, 7 deletions

diff --git a/service/java/com/android/server/wifi/WifiConfigManager.java b/service/java/com/android/server/wifi/WifiConfigManager.java
index fdc950a74..222747ae1 100644
--- a/service/java/com/android/server/wifi/WifiConfigManager.java
+++ b/service/java/com/android/server/wifi/WifiConfigManager.java
@@ -404,7 +404,7 @@ public class WifiConfigManager {
 
     /**
      * Determine if the framework should perform "aggressive" MAC randomization when connecting
-     * to the SSID in the input WifiConfiguration.
+     * to the SSID or FQDN in the input WifiConfiguration.
      * @param config
      * @return
      */
@@ -416,20 +416,24 @@ public class WifiConfigManager {
         if (config.getIpConfiguration().getIpAssignment() == IpConfiguration.IpAssignment.STATIC) {
             return false;
         }
-        return isSsidOptInForAggressiveRandomization(config.SSID);
+        if (config.isPasspoint()) {
+            return isNetworkOptInForAggressiveRandomization(config.FQDN);
+        } else {
+            return isNetworkOptInForAggressiveRandomization(config.SSID);
+        }
     }
 
-    private boolean isSsidOptInForAggressiveRandomization(String ssid) {
+    private boolean isNetworkOptInForAggressiveRandomization(String ssidOrFqdn) {
         Set<String> perDeviceSsidBlocklist = new ArraySet<>(mContext.getResources().getStringArray(
                 R.array.config_wifi_aggressive_randomization_ssid_blocklist));
-        if (mDeviceConfigFacade.getAggressiveMacRandomizationSsidBlocklist().contains(ssid)
-                || perDeviceSsidBlocklist.contains(ssid)) {
+        if (mDeviceConfigFacade.getAggressiveMacRandomizationSsidBlocklist().contains(ssidOrFqdn)
+                || perDeviceSsidBlocklist.contains(ssidOrFqdn)) {
             return false;
         }
         Set<String> perDeviceSsidAllowlist = new ArraySet<>(mContext.getResources().getStringArray(
                 R.array.config_wifi_aggressive_randomization_ssid_allowlist));
-        return mDeviceConfigFacade.getAggressiveMacRandomizationSsidAllowlist().contains(ssid)
-                || perDeviceSsidAllowlist.contains(ssid);
+        return mDeviceConfigFacade.getAggressiveMacRandomizationSsidAllowlist().contains(ssidOrFqdn)
+                || perDeviceSsidAllowlist.contains(ssidOrFqdn);
     }
 
     @VisibleForTesting
diff --git a/tests/wifitests/src/com/android/server/wifi/WifiConfigManagerTest.java b/tests/wifitests/src/com/android/server/wifi/WifiConfigManagerTest.java
index 88bf786e6..20aefe958 100644
--- a/tests/wifitests/src/com/android/server/wifi/WifiConfigManagerTest.java
+++ b/tests/wifitests/src/com/android/server/wifi/WifiConfigManagerTest.java
@@ -2132,6 +2132,27 @@ public class WifiConfigManagerTest extends WifiBaseTest {
     }
 
     /**
+     * Verify that the aggressive randomization whitelist works for passpoints. (by checking FQDN)
+     */
+    @Test
+    public void testShouldUseAggressiveRandomizationPasspoint() {
+        WifiConfiguration c = WifiConfigurationTestUtil.createPasspointNetwork();
+        // Adds SSID to the whitelist.
+        Set<String> ssidList = new HashSet<>();
+        ssidList.add(c.SSID);
+        when(mDeviceConfigFacade.getAggressiveMacRandomizationSsidAllowlist())
+                .thenReturn(ssidList);
+
+        // Verify that if for passpoint networks we don't check for the SSID to be in the whitelist
+        assertFalse(mWifiConfigManager.shouldUseAggressiveRandomization(c));
+
+        // instead we check for the FQDN
+        ssidList.clear();
+        ssidList.add(c.FQDN);
+        assertTrue(mWifiConfigManager.shouldUseAggressiveRandomization(c));
+    }
+
+    /**
      * Verifies that getRandomizedMacAndUpdateIfNeeded updates the randomized MAC address and
      * |randomizedMacExpirationTimeMs| correctly.
      *