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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.net;
import static android.os.UserHandle.MIN_SECONDARY_USER_ID;
import static android.os.UserHandle.SYSTEM;
import static android.os.UserHandle.USER_SYSTEM;
import static android.os.UserHandle.getUid;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.os.Build;
import android.os.UserHandle;
import android.util.ArraySet;
import androidx.test.filters.SmallTest;
import androidx.test.runner.AndroidJUnit4;
import com.android.testutils.ConnectivityModuleTest;
import com.android.testutils.DevSdkIgnoreRule;
import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.util.Set;
@RunWith(AndroidJUnit4.class)
@SmallTest
@ConnectivityModuleTest
public class UidRangeTest {
/*
* UidRange is no longer passed to netd. UID ranges between the framework and netd are passed as
* UidRangeParcel objects.
*/
@Rule
public final DevSdkIgnoreRule mIgnoreRule = new DevSdkIgnoreRule();
@Test
public void testSingleItemUidRangeAllowed() {
new UidRange(123, 123);
new UidRange(0, 0);
new UidRange(Integer.MAX_VALUE, Integer.MAX_VALUE);
}
@Test
public void testNegativeUidsDisallowed() {
try {
new UidRange(-2, 100);
fail("Exception not thrown for negative start UID");
} catch (IllegalArgumentException expected) {
}
try {
new UidRange(-200, -100);
fail("Exception not thrown for negative stop UID");
} catch (IllegalArgumentException expected) {
}
}
@Test
public void testStopLessThanStartDisallowed() {
final int x = 4195000;
try {
new UidRange(x, x - 1);
fail("Exception not thrown for negative-length UID range");
} catch (IllegalArgumentException expected) {
}
}
@Test
public void testGetStartAndEndUser() throws Exception {
final UidRange uidRangeOfPrimaryUser = new UidRange(
getUid(USER_SYSTEM, 10000), getUid(USER_SYSTEM, 10100));
final UidRange uidRangeOfSecondaryUser = new UidRange(
getUid(MIN_SECONDARY_USER_ID, 10000), getUid(MIN_SECONDARY_USER_ID, 10100));
assertEquals(USER_SYSTEM, uidRangeOfPrimaryUser.getStartUser());
assertEquals(USER_SYSTEM, uidRangeOfPrimaryUser.getEndUser());
assertEquals(MIN_SECONDARY_USER_ID, uidRangeOfSecondaryUser.getStartUser());
assertEquals(MIN_SECONDARY_USER_ID, uidRangeOfSecondaryUser.getEndUser());
final UidRange uidRangeForDifferentUsers = new UidRange(
getUid(USER_SYSTEM, 10000), getUid(MIN_SECONDARY_USER_ID, 10100));
assertEquals(USER_SYSTEM, uidRangeOfPrimaryUser.getStartUser());
assertEquals(MIN_SECONDARY_USER_ID, uidRangeOfSecondaryUser.getEndUser());
}
@Test @IgnoreUpTo(Build.VERSION_CODES.R)
public void testCreateForUser() throws Exception {
final UidRange uidRangeOfPrimaryUser = UidRange.createForUser(SYSTEM);
final UidRange uidRangeOfSecondaryUser = UidRange.createForUser(
UserHandle.of(USER_SYSTEM + 1));
assertTrue(uidRangeOfPrimaryUser.stop < uidRangeOfSecondaryUser.start);
assertEquals(USER_SYSTEM, uidRangeOfPrimaryUser.getStartUser());
assertEquals(USER_SYSTEM, uidRangeOfPrimaryUser.getEndUser());
assertEquals(USER_SYSTEM + 1, uidRangeOfSecondaryUser.getStartUser());
assertEquals(USER_SYSTEM + 1, uidRangeOfSecondaryUser.getEndUser());
}
private static void assertSameUids(@NonNull final String msg, @Nullable final Set<UidRange> s1,
@Nullable final Set<UidRange> s2) {
assertTrue(msg + " : " + s1 + " unexpectedly different from " + s2,
UidRange.hasSameUids(s1, s2));
}
private static void assertDifferentUids(@NonNull final String msg,
@Nullable final Set<UidRange> s1, @Nullable final Set<UidRange> s2) {
assertFalse(msg + " : " + s1 + " unexpectedly equal to " + s2,
UidRange.hasSameUids(s1, s2));
}
// R doesn't have UidRange.hasSameUids, but since S has the module, it does have hasSameUids.
@Test @IgnoreUpTo(Build.VERSION_CODES.R)
public void testHasSameUids() {
final UidRange uids1 = new UidRange(1, 100);
final UidRange uids2 = new UidRange(3, 300);
final UidRange uids3 = new UidRange(1, 1000);
final UidRange uids4 = new UidRange(800, 1000);
assertSameUids("null <=> null", null, null);
final Set<UidRange> set1 = new ArraySet<>();
assertDifferentUids("empty <=> null", set1, null);
final Set<UidRange> set2 = new ArraySet<>();
set1.add(uids1);
assertDifferentUids("uids1 <=> null", set1, null);
assertDifferentUids("null <=> uids1", null, set1);
assertDifferentUids("uids1 <=> empty", set1, set2);
set2.add(uids1);
assertSameUids("uids1 <=> uids1", set1, set2);
set1.add(uids2);
assertDifferentUids("uids1,2 <=> uids1", set1, set2);
set1.add(uids3);
assertDifferentUids("uids1,2,3 <=> uids1", set1, set2);
set2.add(uids3);
assertDifferentUids("uids1,2,3 <=> uids1,3", set1, set2);
set2.add(uids2);
assertSameUids("uids1,2,3 <=> uids1,2,3", set1, set2);
set1.remove(uids2);
assertDifferentUids("uids1,3 <=> uids1,2,3", set1, set2);
set1.add(uids4);
assertDifferentUids("uids1,3,4 <=> uids1,2,3", set1, set2);
set2.add(uids4);
assertDifferentUids("uids1,3,4 <=> uids1,2,3,4", set1, set2);
assertDifferentUids("uids1,3,4 <=> null", set1, null);
set2.remove(uids2);
assertSameUids("uids1,3,4 <=> uids1,3,4", set1, set2);
set2.remove(uids1);
assertDifferentUids("uids1,3,4 <=> uids3,4", set1, set2);
set2.remove(uids3);
assertDifferentUids("uids1,3,4 <=> uids4", set1, set2);
set2.remove(uids4);
assertDifferentUids("uids1,3,4 <=> empty", set1, set2);
assertDifferentUids("null <=> empty", null, set2);
assertSameUids("empty <=> empty", set2, new ArraySet<>());
}
}
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