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/*
* Copyright (C) 2018 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.dhcp;
import static android.net.InetAddresses.parseNumericAddress;
import static android.net.dhcp.DhcpServingParams.MTU_UNSET;
import static com.android.net.module.util.Inet4AddressUtils.inet4AddressToIntHTH;
import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.assertFalse;
import static junit.framework.Assert.assertTrue;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.net.LinkAddress;
import android.net.dhcp.DhcpServingParams.InvalidParameterException;
import androidx.test.filters.SmallTest;
import androidx.test.runner.AndroidJUnit4;
import com.android.net.module.util.Inet4AddressUtils;
import com.android.testutils.MiscAssertsKt;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.net.Inet4Address;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
@RunWith(AndroidJUnit4.class)
@SmallTest
public class DhcpServingParamsTest {
@NonNull
private DhcpServingParams.Builder mBuilder;
private static final Set<Inet4Address> TEST_DEFAULT_ROUTERS = new HashSet<>(
Arrays.asList(parseAddr("192.168.0.123"), parseAddr("192.168.0.124")));
private static final long TEST_LEASE_TIME_SECS = 3600L;
private static final Set<Inet4Address> TEST_DNS_SERVERS = new HashSet<>(
Arrays.asList(parseAddr("192.168.0.126"), parseAddr("192.168.0.127")));
private static final Inet4Address TEST_SERVER_ADDR = parseAddr("192.168.0.2");
private static final Inet4Address TEST_CLIENT_ADDR = parseAddr("192.168.0.42");
private static final LinkAddress TEST_LINKADDR = new LinkAddress(TEST_SERVER_ADDR, 20);
private static final int TEST_MTU = 1500;
private static final Set<Inet4Address> TEST_EXCLUDED_ADDRS = new HashSet<>(
Arrays.asList(parseAddr("192.168.0.200"), parseAddr("192.168.0.201")));
private static final boolean TEST_METERED = true;
private static final boolean TEST_CHANGE_PREFIX_ON_DECLINE = true;
@Before
public void setUp() {
mBuilder = new DhcpServingParams.Builder()
.setDefaultRouters(TEST_DEFAULT_ROUTERS)
.setDhcpLeaseTimeSecs(TEST_LEASE_TIME_SECS)
.setDnsServers(TEST_DNS_SERVERS)
.setServerAddr(TEST_LINKADDR)
.setLinkMtu(TEST_MTU)
.setExcludedAddrs(TEST_EXCLUDED_ADDRS)
.setMetered(TEST_METERED)
.setSingleClientAddr(TEST_CLIENT_ADDR)
.setChangePrefixOnDecline(TEST_CHANGE_PREFIX_ON_DECLINE);
}
@Test
public void testBuild_Immutable() throws InvalidParameterException {
final Set<Inet4Address> routers = new HashSet<>(TEST_DEFAULT_ROUTERS);
final Set<Inet4Address> dnsServers = new HashSet<>(TEST_DNS_SERVERS);
final Set<Inet4Address> excludedAddrs = new HashSet<>(TEST_EXCLUDED_ADDRS);
final DhcpServingParams params = mBuilder
.setDefaultRouters(routers)
.setDnsServers(dnsServers)
.setExcludedAddrs(excludedAddrs)
.build();
// Modifications to source objects should not affect builder or final parameters
final Inet4Address addedAddr = parseAddr("192.168.0.223");
routers.add(addedAddr);
dnsServers.add(addedAddr);
excludedAddrs.add(addedAddr);
assertEquals(TEST_DEFAULT_ROUTERS, params.defaultRouters);
assertEquals(TEST_LEASE_TIME_SECS, params.dhcpLeaseTimeSecs);
assertEquals(TEST_DNS_SERVERS, params.dnsServers);
assertEquals(TEST_LINKADDR, params.serverAddr);
assertEquals(TEST_MTU, params.linkMtu);
assertEquals(TEST_METERED, params.metered);
assertEquals(TEST_CHANGE_PREFIX_ON_DECLINE, params.changePrefixOnDecline);
assertContains(params.excludedAddrs, TEST_EXCLUDED_ADDRS);
assertContains(params.excludedAddrs, TEST_DEFAULT_ROUTERS);
assertContains(params.excludedAddrs, TEST_DNS_SERVERS);
assertContains(params.excludedAddrs, TEST_SERVER_ADDR);
assertFalse("excludedAddrs should not contain " + addedAddr,
params.excludedAddrs.contains(addedAddr));
}
@Test(expected = InvalidParameterException.class)
public void testBuild_NegativeLeaseTime() throws InvalidParameterException {
mBuilder.setDhcpLeaseTimeSecs(-1).build();
}
@Test(expected = InvalidParameterException.class)
public void testBuild_LeaseTimeTooLarge() throws InvalidParameterException {
// Set lease time larger than max value for uint32
mBuilder.setDhcpLeaseTimeSecs(1L << 32).build();
}
@Test
public void testBuild_InfiniteLeaseTime() throws InvalidParameterException {
final long infiniteLeaseTime = 0xffffffffL;
final DhcpServingParams params = mBuilder
.setDhcpLeaseTimeSecs(infiniteLeaseTime).build();
assertEquals(infiniteLeaseTime, params.dhcpLeaseTimeSecs);
assertTrue(params.dhcpLeaseTimeSecs > 0L);
}
@Test
public void testBuild_UnsetMtu() throws InvalidParameterException {
final DhcpServingParams params = mBuilder.setLinkMtu(MTU_UNSET).build();
assertEquals(MTU_UNSET, params.linkMtu);
}
@Test(expected = InvalidParameterException.class)
public void testBuild_MtuTooSmall() throws InvalidParameterException {
mBuilder.setLinkMtu(20).build();
}
@Test(expected = InvalidParameterException.class)
public void testBuild_MtuTooLarge() throws InvalidParameterException {
mBuilder.setLinkMtu(65_536).build();
}
@Test(expected = InvalidParameterException.class)
public void testBuild_IPv6Addr() throws InvalidParameterException {
mBuilder.setServerAddr(new LinkAddress(parseNumericAddress("fe80::1111"), 120)).build();
}
@Test(expected = InvalidParameterException.class)
public void testBuild_PrefixTooLarge() throws InvalidParameterException {
mBuilder.setServerAddr(new LinkAddress(TEST_SERVER_ADDR, 15)).build();
}
@Test(expected = InvalidParameterException.class)
public void testBuild_PrefixTooSmall() throws InvalidParameterException {
mBuilder.setDefaultRouters(parseAddr("192.168.0.254"))
.setServerAddr(new LinkAddress(TEST_SERVER_ADDR, 31))
.build();
}
@Test(expected = InvalidParameterException.class)
public void testBuild_RouterNotInPrefix() throws InvalidParameterException {
mBuilder.setDefaultRouters(parseAddr("192.168.254.254")).build();
}
@Test
public void testFromParcelableObject() throws InvalidParameterException {
final DhcpServingParams params = mBuilder.build();
final DhcpServingParamsParcel parcel = new DhcpServingParamsParcel();
parcel.defaultRouters = toIntArray(TEST_DEFAULT_ROUTERS);
parcel.dhcpLeaseTimeSecs = TEST_LEASE_TIME_SECS;
parcel.dnsServers = toIntArray(TEST_DNS_SERVERS);
parcel.serverAddr = inet4AddressToIntHTH(TEST_SERVER_ADDR);
parcel.serverAddrPrefixLength = TEST_LINKADDR.getPrefixLength();
parcel.linkMtu = TEST_MTU;
parcel.excludedAddrs = toIntArray(TEST_EXCLUDED_ADDRS);
parcel.metered = TEST_METERED;
parcel.singleClientAddr = inet4AddressToIntHTH(TEST_CLIENT_ADDR);
parcel.changePrefixOnDecline = TEST_CHANGE_PREFIX_ON_DECLINE;
final DhcpServingParams parceled = DhcpServingParams.fromParcelableObject(parcel);
assertEquals(params.defaultRouters, parceled.defaultRouters);
assertEquals(params.dhcpLeaseTimeSecs, parceled.dhcpLeaseTimeSecs);
assertEquals(params.dnsServers, parceled.dnsServers);
assertEquals(params.serverAddr, parceled.serverAddr);
assertEquals(params.linkMtu, parceled.linkMtu);
assertEquals(params.excludedAddrs, parceled.excludedAddrs);
assertEquals(params.metered, parceled.metered);
assertEquals(params.singleClientAddr, parceled.singleClientAddr);
assertEquals(params.changePrefixOnDecline, parceled.changePrefixOnDecline);
MiscAssertsKt.assertFieldCountEquals(10, DhcpServingParamsParcel.class);
}
@Test(expected = InvalidParameterException.class)
public void testFromParcelableObject_NullArgument() throws InvalidParameterException {
DhcpServingParams.fromParcelableObject(null);
}
private static int[] toIntArray(Collection<Inet4Address> addrs) {
return addrs.stream().mapToInt(Inet4AddressUtils::inet4AddressToIntHTH).toArray();
}
private static <T> void assertContains(@NonNull Set<T> set, @NonNull Set<T> subset) {
for (final T elem : subset) {
assertContains(set, elem);
}
}
private static <T> void assertContains(@NonNull Set<T> set, @Nullable T elem) {
assertTrue("Set does not contain " + elem, set.contains(elem));
}
@NonNull
private static Inet4Address parseAddr(@NonNull String inet4Addr) {
return (Inet4Address) parseNumericAddress(inet4Addr);
}
}
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