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-rw-r--r--wifi/java/android/net/wifi/WifiConfiguration.java39
-rw-r--r--wifi/tests/src/android/net/wifi/WifiConfigurationTest.java32
2 files changed, 52 insertions, 19 deletions
diff --git a/wifi/java/android/net/wifi/WifiConfiguration.java b/wifi/java/android/net/wifi/WifiConfiguration.java
index 21ae3a923946..b77b1ad5f255 100644
--- a/wifi/java/android/net/wifi/WifiConfiguration.java
+++ b/wifi/java/android/net/wifi/WifiConfiguration.java
@@ -25,11 +25,13 @@ import android.net.MacAddress;
import android.net.ProxyInfo;
import android.net.StaticIpConfiguration;
import android.net.Uri;
+import android.net.wifi.WifiInfo;
import android.os.Parcel;
import android.os.Parcelable;
import android.os.UserHandle;
import android.text.TextUtils;
import android.util.BackupUtils;
+import android.util.Log;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
@@ -76,6 +78,8 @@ public class WifiConfiguration implements Parcelable {
/** {@hide} */
private String mPasspointManagementObjectTree;
+ /** {@hide} */
+ private static final int MAXIMUM_RANDOM_MAC_GENERATION_RETRY = 3;
/**
* Recognized key management schemes.
@@ -798,27 +802,37 @@ public class WifiConfiguration implements Parcelable {
* @hide
* Randomized MAC address to use with this particular network
*/
+ @NonNull
private MacAddress mRandomizedMacAddress;
/**
* @hide
* Checks if the given MAC address can be used for Connected Mac Randomization
- * by verifying that it is non-null, unicast, and locally assigned.
+ * by verifying that it is non-null, unicast, locally assigned, and not default mac.
* @param mac MacAddress to check
* @return true if mac is good to use
*/
- private boolean isValidMacAddressForRandomization(MacAddress mac) {
- return mac != null && !mac.isMulticastAddress() && mac.isLocallyAssigned();
+ public static boolean isValidMacAddressForRandomization(MacAddress mac) {
+ return mac != null && !mac.isMulticastAddress() && mac.isLocallyAssigned()
+ && !MacAddress.fromString(WifiInfo.DEFAULT_MAC_ADDRESS).equals(mac);
}
/**
* @hide
* Returns Randomized MAC address to use with the network.
- * If it is not set/valid, create a new randomized address.
+ * If it is not set/valid, creates a new randomized address.
+ * If it can't generate a valid mac, returns the default MAC.
*/
- public MacAddress getOrCreateRandomizedMacAddress() {
- if (!isValidMacAddressForRandomization(mRandomizedMacAddress)) {
+ public @NonNull MacAddress getOrCreateRandomizedMacAddress() {
+ int randomMacGenerationCount = 0;
+ while (!isValidMacAddressForRandomization(mRandomizedMacAddress)
+ && randomMacGenerationCount < MAXIMUM_RANDOM_MAC_GENERATION_RETRY) {
mRandomizedMacAddress = MacAddress.createRandomUnicastAddress();
+ randomMacGenerationCount++;
+ }
+
+ if (!isValidMacAddressForRandomization(mRandomizedMacAddress)) {
+ mRandomizedMacAddress = MacAddress.fromString(WifiInfo.DEFAULT_MAC_ADDRESS);
}
return mRandomizedMacAddress;
}
@@ -828,10 +842,7 @@ public class WifiConfiguration implements Parcelable {
* Returns MAC address set to be the local randomized MAC address.
* Does not guarantee that the returned address is valid for use.
*/
- public MacAddress getRandomizedMacAddress() {
- if (mRandomizedMacAddress == null) {
- mRandomizedMacAddress = MacAddress.ALL_ZEROS_ADDRESS;
- }
+ public @NonNull MacAddress getRandomizedMacAddress() {
return mRandomizedMacAddress;
}
@@ -839,7 +850,11 @@ public class WifiConfiguration implements Parcelable {
* @hide
* @param mac MacAddress to change into
*/
- public void setRandomizedMacAddress(MacAddress mac) {
+ public void setRandomizedMacAddress(@NonNull MacAddress mac) {
+ if (mac == null) {
+ Log.e(TAG, "setRandomizedMacAddress received null MacAddress.");
+ return;
+ }
mRandomizedMacAddress = mac;
}
@@ -1532,7 +1547,7 @@ public class WifiConfiguration implements Parcelable {
creatorUid = -1;
shared = true;
dtimInterval = 0;
- mRandomizedMacAddress = MacAddress.ALL_ZEROS_ADDRESS;
+ mRandomizedMacAddress = MacAddress.fromString(WifiInfo.DEFAULT_MAC_ADDRESS);
}
/**
diff --git a/wifi/tests/src/android/net/wifi/WifiConfigurationTest.java b/wifi/tests/src/android/net/wifi/WifiConfigurationTest.java
index 8a3a7f5a2d79..35179847541c 100644
--- a/wifi/tests/src/android/net/wifi/WifiConfigurationTest.java
+++ b/wifi/tests/src/android/net/wifi/WifiConfigurationTest.java
@@ -18,12 +18,14 @@ package android.net.wifi;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import android.os.Parcel;
import android.net.MacAddress;
import android.net.wifi.WifiConfiguration.NetworkSelectionStatus;
+import android.net.wifi.WifiInfo;
import org.junit.Before;
import org.junit.Test;
@@ -176,22 +178,25 @@ public class WifiConfigurationTest {
@Test
public void testGetOrCreateRandomizedMacAddress_SavesAndReturnsSameAddress() {
WifiConfiguration config = new WifiConfiguration();
- assertEquals(MacAddress.ALL_ZEROS_ADDRESS, config.getRandomizedMacAddress());
+ MacAddress defaultMac = MacAddress.fromString(WifiInfo.DEFAULT_MAC_ADDRESS);
+ assertEquals(defaultMac, config.getRandomizedMacAddress());
MacAddress firstMacAddress = config.getOrCreateRandomizedMacAddress();
MacAddress secondMacAddress = config.getOrCreateRandomizedMacAddress();
+ assertNotEquals(defaultMac, firstMacAddress);
assertEquals(firstMacAddress, secondMacAddress);
}
@Test
public void testSetRandomizedMacAddress_ChangesSavedAddress() {
WifiConfiguration config = new WifiConfiguration();
- assertEquals(MacAddress.ALL_ZEROS_ADDRESS, config.getRandomizedMacAddress());
+ MacAddress defaultMac = MacAddress.fromString(WifiInfo.DEFAULT_MAC_ADDRESS);
+ assertEquals(defaultMac, config.getRandomizedMacAddress());
MacAddress macToChangeInto = MacAddress.createRandomUnicastAddress();
config.setRandomizedMacAddress(macToChangeInto);
- MacAddress macAfterChange = config.getOrCreateRandomizedMacAddress();
+ MacAddress macAfterChange = config.getRandomizedMacAddress();
assertEquals(macToChangeInto, macAfterChange);
}
@@ -200,24 +205,37 @@ public class WifiConfigurationTest {
public void testGetOrCreateRandomizedMacAddress_ReRandomizesInvalidAddress() {
WifiConfiguration config = new WifiConfiguration();
+ MacAddress defaultMac = MacAddress.fromString(WifiInfo.DEFAULT_MAC_ADDRESS);
MacAddress macAddressZeroes = MacAddress.ALL_ZEROS_ADDRESS;
MacAddress macAddressMulticast = MacAddress.fromString("03:ff:ff:ff:ff:ff");
MacAddress macAddressGlobal = MacAddress.fromString("fc:ff:ff:ff:ff:ff");
config.setRandomizedMacAddress(null);
MacAddress macAfterChange = config.getOrCreateRandomizedMacAddress();
- assertFalse(macAfterChange.equals(null));
+ assertNotEquals(macAfterChange, null);
+
+ config.setRandomizedMacAddress(defaultMac);
+ macAfterChange = config.getOrCreateRandomizedMacAddress();
+ assertNotEquals(macAfterChange, defaultMac);
config.setRandomizedMacAddress(macAddressZeroes);
macAfterChange = config.getOrCreateRandomizedMacAddress();
- assertFalse(macAfterChange.equals(macAddressZeroes));
+ assertNotEquals(macAfterChange, macAddressZeroes);
config.setRandomizedMacAddress(macAddressMulticast);
macAfterChange = config.getOrCreateRandomizedMacAddress();
- assertFalse(macAfterChange.equals(macAddressMulticast));
+ assertNotEquals(macAfterChange, macAddressMulticast);
config.setRandomizedMacAddress(macAddressGlobal);
macAfterChange = config.getOrCreateRandomizedMacAddress();
- assertFalse(macAfterChange.equals(macAddressGlobal));
+ assertNotEquals(macAfterChange, macAddressGlobal);
+ }
+
+ @Test
+ public void testSetRandomizedMacAddress_DoesNothingWhenNull() {
+ WifiConfiguration config = new WifiConfiguration();
+ MacAddress defaultMac = MacAddress.fromString(WifiInfo.DEFAULT_MAC_ADDRESS);
+ config.setRandomizedMacAddress(null);
+ assertEquals(defaultMac, config.getRandomizedMacAddress());
}
}
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2026-01-04 11:05:34 +0000