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Merge changes from topic "fix_master_build"

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am: 2e5319117a

Change-Id: If49999e7ce6149e847a678b03ccf8b4549f8365b
This commit is contained in:
Fedor Kudasov
2019-07-09 06:10:01 -07:00
committed by android-build-merger
parent 4896785b0b 2559cb3953
commit da2257cea2
2 changed files with 189 additions and 22 deletions
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83
core/java/android/net/NetworkUtils.java
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@@ -16,19 +16,15 @@
package android.net;
import static android.system.OsConstants.AF_INET;
import static android.system.OsConstants.AF_INET6;
import android.annotation.NonNull;
import android.annotation.UnsupportedAppUsage;
import android.net.shared.Inet4AddressUtils;
import android.os.Build;
import android.system.ErrnoException;
import android.system.Os;
import android.util.Log;
import android.util.Pair;
import java.io.FileDescriptor;
import java.math.BigInteger;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
@@ -36,6 +32,7 @@ import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Collection;
import java.util.Locale;
import java.util.TreeSet;
/**
* Native methods for managing network interfaces.
@@ -390,30 +387,72 @@ public class NetworkUtils {
return result;
}
private static final int[] ADDRESS_FAMILIES = new int[] {AF_INET, AF_INET6};
/**
* Returns a prefix set without overlaps.
*
* This expects the src set to be sorted from shorter to longer. Results are undefined
* failing this condition. The returned prefix set is sorted in the same order as the
* passed set, with the same comparator.
*/
private static TreeSet<IpPrefix> deduplicatePrefixSet(final TreeSet<IpPrefix> src) {
final TreeSet<IpPrefix> dst = new TreeSet<>(src.comparator());
// Prefixes match addresses that share their upper part up to their length, therefore
// the only kind of possible overlap in two prefixes is strict inclusion of the longer
// (more restrictive) in the shorter (including equivalence if they have the same
// length).
// Because prefixes in the src set are sorted from shorter to longer, deduplicating
// is done by simply iterating in order, and not adding any longer prefix that is
// already covered by a shorter one.
newPrefixes:
for (IpPrefix newPrefix : src) {
for (IpPrefix existingPrefix : dst) {
if (existingPrefix.containsPrefix(newPrefix)) {
continue newPrefixes;
}
}
dst.add(newPrefix);
}
return dst;
}
/**
* Returns true if the hostname is weakly validated.
* @param hostname Name of host to validate.
* @return True if it's a valid-ish hostname.
* Returns how many IPv4 addresses match any of the prefixes in the passed ordered set.
*
* @hide
* Obviously this returns an integral value between 0 and 2**32.
* The behavior is undefined if any of the prefixes is not an IPv4 prefix or if the
* set is not ordered smallest prefix to longer prefix.
*
* @param prefixes the set of prefixes, ordered by length
*/
public static boolean isWeaklyValidatedHostname(@NonNull String hostname) {
// TODO(b/34953048): Use a validation method that permits more accurate,
// but still inexpensive, checking of likely valid DNS hostnames.
final String weakHostnameRegex = "^[a-zA-Z0-9_.-]+$";
if (!hostname.matches(weakHostnameRegex)) {
return false;
}
for (int address_family : ADDRESS_FAMILIES) {
if (Os.inet_pton(address_family, hostname) != null) {
return false;
public static long routedIPv4AddressCount(final TreeSet<IpPrefix> prefixes) {
long routedIPCount = 0;
for (final IpPrefix prefix : deduplicatePrefixSet(prefixes)) {
if (!prefix.isIPv4()) {
Log.wtf(TAG, "Non-IPv4 prefix in routedIPv4AddressCount");
}
int rank = 32 - prefix.getPrefixLength();
routedIPCount += 1L << rank;
}
return routedIPCount;
}
return true;
/**
* Returns how many IPv6 addresses match any of the prefixes in the passed ordered set.
*
* This returns a BigInteger between 0 and 2**128.
* The behavior is undefined if any of the prefixes is not an IPv6 prefix or if the
* set is not ordered smallest prefix to longer prefix.
*/
public static BigInteger routedIPv6AddressCount(final TreeSet<IpPrefix> prefixes) {
BigInteger routedIPCount = BigInteger.ZERO;
for (final IpPrefix prefix : deduplicatePrefixSet(prefixes)) {
if (!prefix.isIPv6()) {
Log.wtf(TAG, "Non-IPv6 prefix in routedIPv6AddressCount");
}
int rank = 128 - prefix.getPrefixLength();
routedIPCount = routedIPCount.add(BigInteger.ONE.shiftLeft(rank));
}
return routedIPCount;
}
private static final int[] ADDRESS_FAMILIES = new int[] {AF_INET, AF_INET6};

128
tests/net/java/android/net/NetworkUtilsTest.java Normal file
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@@ -0,0 +1,128 @@
/*
* Copyright (C) 2015 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 junit.framework.Assert.assertEquals;
import androidx.test.runner.AndroidJUnit4;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.math.BigInteger;
import java.util.TreeSet;
@RunWith(AndroidJUnit4.class)
@androidx.test.filters.SmallTest
public class NetworkUtilsTest {
@Test
public void testRoutedIPv4AddressCount() {
final TreeSet<IpPrefix> set = new TreeSet<>(IpPrefix.lengthComparator());
// No routes routes to no addresses.
assertEquals(0, NetworkUtils.routedIPv4AddressCount(set));
set.add(new IpPrefix("0.0.0.0/0"));
assertEquals(1l << 32, NetworkUtils.routedIPv4AddressCount(set));
set.add(new IpPrefix("20.18.0.0/16"));
set.add(new IpPrefix("20.18.0.0/24"));
set.add(new IpPrefix("20.18.0.0/8"));
// There is a default route, still covers everything
assertEquals(1l << 32, NetworkUtils.routedIPv4AddressCount(set));
set.clear();
set.add(new IpPrefix("20.18.0.0/24"));
set.add(new IpPrefix("20.18.0.0/8"));
// The 8-length includes the 24-length prefix
assertEquals(1l << 24, NetworkUtils.routedIPv4AddressCount(set));
set.add(new IpPrefix("10.10.10.126/25"));
// The 8-length does not include this 25-length prefix
assertEquals((1l << 24) + (1 << 7), NetworkUtils.routedIPv4AddressCount(set));
set.clear();
set.add(new IpPrefix("1.2.3.4/32"));
set.add(new IpPrefix("1.2.3.4/32"));
set.add(new IpPrefix("1.2.3.4/32"));
set.add(new IpPrefix("1.2.3.4/32"));
assertEquals(1l, NetworkUtils.routedIPv4AddressCount(set));
set.add(new IpPrefix("1.2.3.5/32"));
set.add(new IpPrefix("1.2.3.6/32"));
set.add(new IpPrefix("1.2.3.7/32"));
set.add(new IpPrefix("1.2.3.8/32"));
set.add(new IpPrefix("1.2.3.9/32"));
set.add(new IpPrefix("1.2.3.0/32"));
assertEquals(7l, NetworkUtils.routedIPv4AddressCount(set));
// 1.2.3.4/30 eats 1.2.3.{4-7}/32
set.add(new IpPrefix("1.2.3.4/30"));
set.add(new IpPrefix("6.2.3.4/28"));
set.add(new IpPrefix("120.2.3.4/16"));
assertEquals(7l - 4 + 4 + 16 + 65536, NetworkUtils.routedIPv4AddressCount(set));
}
@Test
public void testRoutedIPv6AddressCount() {
final TreeSet<IpPrefix> set = new TreeSet<>(IpPrefix.lengthComparator());
// No routes routes to no addresses.
assertEquals(BigInteger.ZERO, NetworkUtils.routedIPv6AddressCount(set));
set.add(new IpPrefix("::/0"));
assertEquals(BigInteger.ONE.shiftLeft(128), NetworkUtils.routedIPv6AddressCount(set));
set.add(new IpPrefix("1234:622a::18/64"));
set.add(new IpPrefix("add4:f00:80:f7:1111::6adb/96"));
set.add(new IpPrefix("add4:f00:80:f7:1111::6adb/8"));
// There is a default route, still covers everything
assertEquals(BigInteger.ONE.shiftLeft(128), NetworkUtils.routedIPv6AddressCount(set));
set.clear();
set.add(new IpPrefix("add4:f00:80:f7:1111::6adb/96"));
set.add(new IpPrefix("add4:f00:80:f7:1111::6adb/8"));
// The 8-length includes the 96-length prefix
assertEquals(BigInteger.ONE.shiftLeft(120), NetworkUtils.routedIPv6AddressCount(set));
set.add(new IpPrefix("10::26/64"));
// The 8-length does not include this 64-length prefix
assertEquals(BigInteger.ONE.shiftLeft(120).add(BigInteger.ONE.shiftLeft(64)),
NetworkUtils.routedIPv6AddressCount(set));
set.clear();
set.add(new IpPrefix("add4:f00:80:f7:1111::6ad4/128"));
set.add(new IpPrefix("add4:f00:80:f7:1111::6ad4/128"));
set.add(new IpPrefix("add4:f00:80:f7:1111::6ad4/128"));
set.add(new IpPrefix("add4:f00:80:f7:1111::6ad4/128"));
assertEquals(BigInteger.ONE, NetworkUtils.routedIPv6AddressCount(set));
set.add(new IpPrefix("add4:f00:80:f7:1111::6ad5/128"));
set.add(new IpPrefix("add4:f00:80:f7:1111::6ad6/128"));
set.add(new IpPrefix("add4:f00:80:f7:1111::6ad7/128"));
set.add(new IpPrefix("add4:f00:80:f7:1111::6ad8/128"));
set.add(new IpPrefix("add4:f00:80:f7:1111::6ad9/128"));
set.add(new IpPrefix("add4:f00:80:f7:1111::6ad0/128"));
assertEquals(BigInteger.valueOf(7), NetworkUtils.routedIPv6AddressCount(set));
// add4:f00:80:f7:1111::6ad4/126 eats add4:f00:8[:f7:1111::6ad{4-7}/128
set.add(new IpPrefix("add4:f00:80:f7:1111::6ad4/126"));
set.add(new IpPrefix("d00d:f00:80:f7:1111::6ade/124"));
set.add(new IpPrefix("f00b:a33::/112"));
assertEquals(BigInteger.valueOf(7l - 4 + 4 + 16 + 65536),
NetworkUtils.routedIPv6AddressCount(set));
}
}