import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Arrays;
+import java.util.Comparator;
/**
* This class represents an IP prefix, i.e., a contiguous block of IP addresses aligned on a
}
/**
+ * Returns whether the specified prefix is entirely contained in this prefix.
+ *
+ * Note this is mathematical inclusion, so a prefix is always contained within itself.
+ * @param otherPrefix the prefix to test
+ * @hide
+ */
+ public boolean containsPrefix(IpPrefix otherPrefix) {
+ if (otherPrefix.getPrefixLength() < prefixLength) return false;
+ final byte[] otherAddress = otherPrefix.getRawAddress();
+ NetworkUtils.maskRawAddress(otherAddress, prefixLength);
+ return Arrays.equals(otherAddress, address);
+ }
+
+ /**
* @hide
*/
public boolean isIPv6() {
}
/**
+ * Returns a comparator ordering IpPrefixes by length, shorter to longer.
+ * Contents of the address will break ties.
+ * @hide
+ */
+ public static Comparator<IpPrefix> lengthComparator() {
+ return new Comparator<IpPrefix>() {
+ @Override
+ public int compare(IpPrefix prefix1, IpPrefix prefix2) {
+ if (prefix1.isIPv4()) {
+ if (prefix2.isIPv6()) return -1;
+ } else {
+ if (prefix2.isIPv4()) return 1;
+ }
+ final int p1len = prefix1.getPrefixLength();
+ final int p2len = prefix2.getPrefixLength();
+ if (p1len < p2len) return -1;
+ if (p2len < p1len) return 1;
+ final byte[] a1 = prefix1.address;
+ final byte[] a2 = prefix2.address;
+ final int len = a1.length < a2.length ? a1.length : a2.length;
+ for (int i = 0; i < len; ++i) {
+ if (a1[i] < a2[i]) return -1;
+ if (a1[i] > a2[i]) return 1;
+ }
+ if (a2.length < len) return 1;
+ if (a1.length < len) return -1;
+ return 0;
+ }
+ };
+ }
+
+ /**
* Implement the Parcelable interface.
*/
public static final Creator<IpPrefix> CREATOR =
package android.net;
+import android.os.Parcel;
+import android.util.Log;
+import android.util.Pair;
+
import java.io.FileDescriptor;
-import java.net.InetAddress;
+import java.math.BigInteger;
import java.net.Inet4Address;
import java.net.Inet6Address;
+import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Collection;
import java.util.Locale;
-
-import android.os.Parcel;
-import android.util.Log;
-import android.util.Pair;
-
+import java.util.TreeSet;
/**
* Native methods for managing network interfaces.
result = builder.toString();
return result;
}
+
+ /**
+ * 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 how many IPv4 addresses match any of the prefixes in the passed ordered set.
+ *
+ * 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 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;
+ }
+
+ /**
+ * 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;
+ }
}
import android.net.NetworkInfo;
import android.net.NetworkInfo.DetailedState;
import android.net.NetworkMisc;
+import android.net.NetworkUtils;
import android.net.RouteInfo;
import android.net.UidRange;
import android.net.Uri;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
+import java.math.BigInteger;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
+import java.util.Comparator;
import java.util.List;
import java.util.Set;
import java.util.SortedSet;
// the device idle whitelist during service launch and VPN bootstrap.
private static final long VPN_LAUNCH_IDLE_WHITELIST_DURATION_MS = 60 * 1000;
+ // Settings for how much of the address space should be routed so that Vpn considers
+ // "most" of the address space is routed. This is used to determine whether this Vpn
+ // should be marked with the INTERNET capability.
+ private static final long MOST_IPV4_ADDRESSES_COUNT;
+ private static final BigInteger MOST_IPV6_ADDRESSES_COUNT;
+ static {
+ // 85% of the address space must be routed for Vpn to consider this VPN to provide
+ // INTERNET access.
+ final int howManyPercentIsMost = 85;
+
+ final long twoPower32 = 1L << 32;
+ MOST_IPV4_ADDRESSES_COUNT = twoPower32 * howManyPercentIsMost / 100;
+ final BigInteger twoPower128 = BigInteger.ONE.shiftLeft(128);
+ MOST_IPV6_ADDRESSES_COUNT = twoPower128
+ .multiply(BigInteger.valueOf(howManyPercentIsMost))
+ .divide(BigInteger.valueOf(100));
+ }
+
// TODO: create separate trackers for each unique VPN to support
// automated reconnection
return lp;
}
+ /**
+ * Analyzes the passed LinkedProperties to figure out whether it routes to most of the IP space.
+ *
+ * This returns true if the passed LinkedProperties contains routes to either most of the IPv4
+ * space or to most of the IPv6 address space, where "most" is defined by the value of the
+ * MOST_IPV{4,6}_ADDRESSES_COUNT constants : if more than this number of addresses are matched
+ * by any of the routes, then it's decided that most of the space is routed.
+ * @hide
+ */
+ @VisibleForTesting
+ static boolean providesRoutesToMostDestinations(LinkProperties lp) {
+ final Comparator<IpPrefix> prefixLengthComparator = IpPrefix.lengthComparator();
+ TreeSet<IpPrefix> ipv4Prefixes = new TreeSet<>(prefixLengthComparator);
+ TreeSet<IpPrefix> ipv6Prefixes = new TreeSet<>(prefixLengthComparator);
+ for (final RouteInfo route : lp.getAllRoutes()) {
+ IpPrefix destination = route.getDestination();
+ if (destination.isIPv4()) {
+ ipv4Prefixes.add(destination);
+ } else {
+ ipv6Prefixes.add(destination);
+ }
+ }
+ if (NetworkUtils.routedIPv4AddressCount(ipv4Prefixes) > MOST_IPV4_ADDRESSES_COUNT) {
+ return true;
+ }
+ return NetworkUtils.routedIPv6AddressCount(ipv6Prefixes)
+ .compareTo(MOST_IPV6_ADDRESSES_COUNT) >= 0;
+ }
+
private void agentConnect() {
LinkProperties lp = makeLinkProperties();
- if (lp.hasIPv4DefaultRoute() || lp.hasIPv6DefaultRoute()) {
+ if (providesRoutesToMostDestinations(lp)) {
mNetworkCapabilities.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
} else {
mNetworkCapabilities.removeCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
}
@Test
- public void testContains() {
+ public void testContainsInetAddress() {
IpPrefix p = new IpPrefix("2001:db8:f00::ace:d00d/127");
assertTrue(p.contains(Address("2001:db8:f00::ace:d00c")));
assertTrue(p.contains(Address("2001:db8:f00::ace:d00d")));
assertFalse(p.contains(Address("2001:db8:f00::ace:d00e")));
assertFalse(p.contains(Address("2001:db8:f00::bad:d00d")));
assertFalse(p.contains(Address("2001:4868:4860::8888")));
- assertFalse(p.contains(null));
+ assertFalse(p.contains((InetAddress)null));
assertFalse(p.contains(Address("8.8.8.8")));
p = new IpPrefix("192.0.2.0/23");
}
@Test
+ public void testContainsIpPrefix() {
+ assertTrue(new IpPrefix("0.0.0.0/0").containsPrefix(new IpPrefix("0.0.0.0/0")));
+ assertTrue(new IpPrefix("0.0.0.0/0").containsPrefix(new IpPrefix("1.2.3.4/0")));
+ assertTrue(new IpPrefix("0.0.0.0/0").containsPrefix(new IpPrefix("1.2.3.4/8")));
+ assertTrue(new IpPrefix("0.0.0.0/0").containsPrefix(new IpPrefix("1.2.3.4/24")));
+ assertTrue(new IpPrefix("0.0.0.0/0").containsPrefix(new IpPrefix("1.2.3.4/23")));
+
+ assertTrue(new IpPrefix("1.2.3.4/8").containsPrefix(new IpPrefix("1.2.3.4/8")));
+ assertTrue(new IpPrefix("1.2.3.4/8").containsPrefix(new IpPrefix("1.254.12.9/8")));
+ assertTrue(new IpPrefix("1.2.3.4/21").containsPrefix(new IpPrefix("1.2.3.4/21")));
+ assertTrue(new IpPrefix("1.2.3.4/32").containsPrefix(new IpPrefix("1.2.3.4/32")));
+
+ assertTrue(new IpPrefix("1.2.3.4/20").containsPrefix(new IpPrefix("1.2.3.0/24")));
+
+ assertFalse(new IpPrefix("1.2.3.4/32").containsPrefix(new IpPrefix("1.2.3.5/32")));
+ assertFalse(new IpPrefix("1.2.3.4/8").containsPrefix(new IpPrefix("2.2.3.4/8")));
+ assertFalse(new IpPrefix("0.0.0.0/16").containsPrefix(new IpPrefix("0.0.0.0/15")));
+ assertFalse(new IpPrefix("100.0.0.0/8").containsPrefix(new IpPrefix("99.0.0.0/8")));
+
+ assertTrue(new IpPrefix("::/0").containsPrefix(new IpPrefix("::/0")));
+ assertTrue(new IpPrefix("::/0").containsPrefix(new IpPrefix("2001:db8::f00/1")));
+ assertTrue(new IpPrefix("::/0").containsPrefix(new IpPrefix("3d8a:661:a0::770/8")));
+ assertTrue(new IpPrefix("::/0").containsPrefix(new IpPrefix("2001:db8::f00/8")));
+ assertTrue(new IpPrefix("::/0").containsPrefix(new IpPrefix("2001:db8::f00/64")));
+ assertTrue(new IpPrefix("::/0").containsPrefix(new IpPrefix("2001:db8::f00/113")));
+ assertTrue(new IpPrefix("::/0").containsPrefix(new IpPrefix("2001:db8::f00/128")));
+
+ assertTrue(new IpPrefix("2001:db8:f00::ace:d00d/64").containsPrefix(
+ new IpPrefix("2001:db8:f00::ace:d00d/64")));
+ assertTrue(new IpPrefix("2001:db8:f00::ace:d00d/64").containsPrefix(
+ new IpPrefix("2001:db8:f00::ace:d00d/120")));
+ assertFalse(new IpPrefix("2001:db8:f00::ace:d00d/64").containsPrefix(
+ new IpPrefix("2001:db8:f00::ace:d00d/32")));
+ assertFalse(new IpPrefix("2001:db8:f00::ace:d00d/64").containsPrefix(
+ new IpPrefix("2006:db8:f00::ace:d00d/96")));
+
+ assertTrue(new IpPrefix("2001:db8:f00::ace:d00d/128").containsPrefix(
+ new IpPrefix("2001:db8:f00::ace:d00d/128")));
+ assertTrue(new IpPrefix("2001:db8:f00::ace:d00d/100").containsPrefix(
+ new IpPrefix("2001:db8:f00::ace:ccaf/110")));
+
+ assertFalse(new IpPrefix("2001:db8:f00::ace:d00d/128").containsPrefix(
+ new IpPrefix("2001:db8:f00::ace:d00e/128")));
+ assertFalse(new IpPrefix("::/30").containsPrefix(new IpPrefix("::/29")));
+ }
+
+ @Test
public void testHashCode() {
IpPrefix p = new IpPrefix(new byte[4], 0);
Random random = new Random();
import android.net.NetworkUtils;
import android.test.suitebuilder.annotation.SmallTest;
+import java.math.BigInteger;
import java.net.Inet4Address;
import java.net.InetAddress;
+import java.util.TreeSet;
import junit.framework.TestCase;
assertInvalidNetworkMask(IPv4Address("255.255.255.253"));
assertInvalidNetworkMask(IPv4Address("255.255.0.255"));
}
+
+ @SmallTest
+ 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));
+ }
+
+ @SmallTest
+ 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));
+ }
}
import android.content.pm.UserInfo;
import android.content.res.Resources;
import android.net.ConnectivityManager;
+import android.net.IConnectivityManager;
+import android.net.IpPrefix;
+import android.net.LinkProperties;
import android.net.Network;
import android.net.NetworkCapabilities;
import android.net.NetworkInfo.DetailedState;
+import android.net.RouteInfo;
import android.net.UidRange;
import android.net.VpnService;
import android.os.Build.VERSION_CODES;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
-
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
/**
* Tests for {@link Vpn}.
return networks.get(network);
}).when(mConnectivityManager).getNetworkCapabilities(any());
}
+
+ // Need multiple copies of this, but Java's Stream objects can't be reused or
+ // duplicated.
+ private Stream<String> publicIpV4Routes() {
+ return Stream.of(
+ "0.0.0.0/5", "8.0.0.0/7", "11.0.0.0/8", "12.0.0.0/6", "16.0.0.0/4",
+ "32.0.0.0/3", "64.0.0.0/2", "128.0.0.0/3", "160.0.0.0/5", "168.0.0.0/6",
+ "172.0.0.0/12", "172.32.0.0/11", "172.64.0.0/10", "172.128.0.0/9",
+ "173.0.0.0/8", "174.0.0.0/7", "176.0.0.0/4", "192.0.0.0/9", "192.128.0.0/11",
+ "192.160.0.0/13", "192.169.0.0/16", "192.170.0.0/15", "192.172.0.0/14",
+ "192.176.0.0/12", "192.192.0.0/10", "193.0.0.0/8", "194.0.0.0/7",
+ "196.0.0.0/6", "200.0.0.0/5", "208.0.0.0/4");
+ }
+
+ private Stream<String> publicIpV6Routes() {
+ return Stream.of(
+ "::/1", "8000::/2", "c000::/3", "e000::/4", "f000::/5", "f800::/6",
+ "fe00::/8", "2605:ef80:e:af1d::/64");
+ }
+
+ @Test
+ public void testProvidesRoutesToMostDestinations() {
+ final LinkProperties lp = new LinkProperties();
+
+ // Default route provides routes to all IPv4 destinations.
+ lp.addRoute(new RouteInfo(new IpPrefix("0.0.0.0/0")));
+ assertTrue(Vpn.providesRoutesToMostDestinations(lp));
+
+ // Empty LP provides routes to no destination
+ lp.clear();
+ assertFalse(Vpn.providesRoutesToMostDestinations(lp));
+
+ // All IPv4 routes except for local networks. This is the case most relevant
+ // to this function. It provides routes to almost the entire space.
+ // (clone the stream so that we can reuse it later)
+ publicIpV4Routes().forEach(s -> lp.addRoute(new RouteInfo(new IpPrefix(s))));
+ assertTrue(Vpn.providesRoutesToMostDestinations(lp));
+
+ // Removing a 16-bit prefix, which is 65536 addresses. This is still enough to
+ // provide routes to "most" destinations.
+ lp.removeRoute(new RouteInfo(new IpPrefix("192.169.0.0/16")));
+ assertTrue(Vpn.providesRoutesToMostDestinations(lp));
+
+ // Remove the /2 route, which represent a quarter of the available routing space.
+ // This LP does not provides routes to "most" destinations any more.
+ lp.removeRoute(new RouteInfo(new IpPrefix("64.0.0.0/2")));
+ assertFalse(Vpn.providesRoutesToMostDestinations(lp));
+
+ lp.clear();
+ publicIpV6Routes().forEach(s -> lp.addRoute(new RouteInfo(new IpPrefix(s))));
+ assertTrue(Vpn.providesRoutesToMostDestinations(lp));
+
+ lp.removeRoute(new RouteInfo(new IpPrefix("::/1")));
+ assertFalse(Vpn.providesRoutesToMostDestinations(lp));
+
+ // V6 does not provide sufficient coverage but v4 does
+ publicIpV4Routes().forEach(s -> lp.addRoute(new RouteInfo(new IpPrefix(s))));
+ assertTrue(Vpn.providesRoutesToMostDestinations(lp));
+
+ // V4 still does
+ lp.removeRoute(new RouteInfo(new IpPrefix("192.169.0.0/16")));
+ assertTrue(Vpn.providesRoutesToMostDestinations(lp));
+
+ // V4 does not any more
+ lp.removeRoute(new RouteInfo(new IpPrefix("64.0.0.0/2")));
+ assertFalse(Vpn.providesRoutesToMostDestinations(lp));
+
+ // V4 does not, but V6 has sufficient coverage again
+ lp.addRoute(new RouteInfo(new IpPrefix("::/1")));
+ assertTrue(Vpn.providesRoutesToMostDestinations(lp));
+ }
}
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