Revert "Revert "Block incoming non-VPN packets to apps under fully-routed VPN""
This reverts commit 3897df2e36d4d015304b398c545c1232ee35a1c9.
Reason for revert: Rolling forward, will fix tests in same CL stack.
Bug: 114231106
Bug: 130397860
Test: FrameworksNetTests
Change-Id: Ia8a0c99b4e1fd5dff26c881715cd876618ca4321
diff --git a/core/java/android/net/NetworkCapabilities.java b/core/java/android/net/NetworkCapabilities.java
index 99375f8..dfd7089 100644
--- a/core/java/android/net/NetworkCapabilities.java
+++ b/core/java/android/net/NetworkCapabilities.java
@@ -822,6 +822,11 @@
mEstablishingVpnAppUid = uid;
}
+ /** @hide */
+ public int getEstablishingVpnAppUid() {
+ return mEstablishingVpnAppUid;
+ }
+
/**
* Value indicating that link bandwidth is unspecified.
* @hide
diff --git a/core/java/android/net/UidRange.java b/core/java/android/net/UidRange.java
index fa0eeb9e..a1ac960 100644
--- a/core/java/android/net/UidRange.java
+++ b/core/java/android/net/UidRange.java
@@ -21,6 +21,8 @@
import android.os.Parcel;
import android.os.Parcelable;
+import java.util.Collection;
+
/**
* An inclusive range of UIDs.
*
@@ -42,10 +44,16 @@
return new UidRange(userId * PER_USER_RANGE, (userId + 1) * PER_USER_RANGE - 1);
}
+ /** Returns the smallest user Id which is contained in this UidRange */
public int getStartUser() {
return start / PER_USER_RANGE;
}
+ /** Returns the largest user Id which is contained in this UidRange */
+ public int getEndUser() {
+ return stop / PER_USER_RANGE;
+ }
+
public boolean contains(int uid) {
return start <= uid && uid <= stop;
}
@@ -117,4 +125,23 @@
return new UidRange[size];
}
};
+
+ /**
+ * Returns whether any of the UidRange in the collection contains the specified uid
+ *
+ * @param ranges The collection of UidRange to check
+ * @param uid the uid in question
+ * @return {@code true} if the uid is contained within the ranges, {@code false} otherwise
+ *
+ * @see UidRange#contains(int)
+ */
+ public static boolean containsUid(Collection<UidRange> ranges, int uid) {
+ if (ranges == null) return false;
+ for (UidRange range : ranges) {
+ if (range.contains(uid)) {
+ return true;
+ }
+ }
+ return false;
+ }
}
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index 524548f..c1aff75 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -47,6 +47,7 @@
import static com.android.internal.util.Preconditions.checkNotNull;
+import android.annotation.NonNull;
import android.annotation.Nullable;
import android.app.BroadcastOptions;
import android.app.NotificationManager;
@@ -276,7 +277,8 @@
private Tethering mTethering;
- private final PermissionMonitor mPermissionMonitor;
+ @VisibleForTesting
+ protected final PermissionMonitor mPermissionMonitor;
private KeyStore mKeyStore;
@@ -829,13 +831,13 @@
public ConnectivityService(Context context, INetworkManagementService netManager,
INetworkStatsService statsService, INetworkPolicyManager policyManager) {
this(context, netManager, statsService, policyManager,
- getDnsResolver(), new IpConnectivityLog());
+ getDnsResolver(), new IpConnectivityLog(), NetdService.getInstance());
}
@VisibleForTesting
protected ConnectivityService(Context context, INetworkManagementService netManager,
INetworkStatsService statsService, INetworkPolicyManager policyManager,
- IDnsResolver dnsresolver, IpConnectivityLog logger) {
+ IDnsResolver dnsresolver, IpConnectivityLog logger, INetd netd) {
if (DBG) log("ConnectivityService starting up");
mSystemProperties = getSystemProperties();
@@ -875,7 +877,7 @@
mDnsResolver = checkNotNull(dnsresolver, "missing IDnsResolver");
mProxyTracker = makeProxyTracker();
- mNetd = NetdService.getInstance();
+ mNetd = netd;
mKeyStore = KeyStore.getInstance();
mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
@@ -961,7 +963,7 @@
mTethering = makeTethering();
- mPermissionMonitor = new PermissionMonitor(mContext, mNMS, mNetd);
+ mPermissionMonitor = new PermissionMonitor(mContext, mNetd);
// Set up the listener for user state for creating user VPNs.
// Should run on mHandler to avoid any races.
@@ -2441,6 +2443,13 @@
pw.println("NetworkStackClient logs:");
pw.increaseIndent();
NetworkStackClient.getInstance().dump(pw);
+ pw.decreaseIndent();
+
+ pw.println();
+ pw.println("Permission Monitor:");
+ pw.increaseIndent();
+ mPermissionMonitor.dump(pw);
+ pw.decreaseIndent();
}
private void dumpNetworks(IndentingPrintWriter pw) {
@@ -5465,6 +5474,11 @@
networkAgent.clatd.fixupLinkProperties(oldLp, newLp);
updateInterfaces(newLp, oldLp, netId, networkAgent.networkCapabilities);
+
+ // update filtering rules, need to happen after the interface update so netd knows about the
+ // new interface (the interface name -> index map becomes initialized)
+ updateVpnFiltering(newLp, oldLp, networkAgent);
+
updateMtu(newLp, oldLp);
// TODO - figure out what to do for clat
// for (LinkProperties lp : newLp.getStackedLinks()) {
@@ -5630,6 +5644,37 @@
}
}
+ private void updateVpnFiltering(LinkProperties newLp, LinkProperties oldLp,
+ NetworkAgentInfo nai) {
+ final String oldIface = oldLp != null ? oldLp.getInterfaceName() : null;
+ final String newIface = newLp != null ? newLp.getInterfaceName() : null;
+ final boolean wasFiltering = requiresVpnIsolation(nai, nai.networkCapabilities, oldLp);
+ final boolean needsFiltering = requiresVpnIsolation(nai, nai.networkCapabilities, newLp);
+
+ if (!wasFiltering && !needsFiltering) {
+ // Nothing to do.
+ return;
+ }
+
+ if (Objects.equals(oldIface, newIface) && (wasFiltering == needsFiltering)) {
+ // Nothing changed.
+ return;
+ }
+
+ final Set<UidRange> ranges = nai.networkCapabilities.getUids();
+ final int vpnAppUid = nai.networkCapabilities.getEstablishingVpnAppUid();
+ // TODO: this create a window of opportunity for apps to receive traffic between the time
+ // when the old rules are removed and the time when new rules are added. To fix this,
+ // make eBPF support two whitelisted interfaces so here new rules can be added before the
+ // old rules are being removed.
+ if (wasFiltering) {
+ mPermissionMonitor.onVpnUidRangesRemoved(oldIface, ranges, vpnAppUid);
+ }
+ if (needsFiltering) {
+ mPermissionMonitor.onVpnUidRangesAdded(newIface, ranges, vpnAppUid);
+ }
+ }
+
private int getNetworkPermission(NetworkCapabilities nc) {
if (!nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) {
return INetd.PERMISSION_SYSTEM;
@@ -5772,6 +5817,34 @@
}
}
+ /**
+ * Returns whether VPN isolation (ingress interface filtering) should be applied on the given
+ * network.
+ *
+ * Ingress interface filtering enforces that all apps under the given network can only receive
+ * packets from the network's interface (and loopback). This is important for VPNs because
+ * apps that cannot bypass a fully-routed VPN shouldn't be able to receive packets from any
+ * non-VPN interfaces.
+ *
+ * As a result, this method should return true iff
+ * 1. the network is an app VPN (not legacy VPN)
+ * 2. the VPN does not allow bypass
+ * 3. the VPN is fully-routed
+ * 4. the VPN interface is non-null
+ *
+ * @See INetd#firewallAddUidInterfaceRules
+ * @See INetd#firewallRemoveUidInterfaceRules
+ */
+ private boolean requiresVpnIsolation(@NonNull NetworkAgentInfo nai, NetworkCapabilities nc,
+ LinkProperties lp) {
+ if (nc == null || lp == null) return false;
+ return nai.isVPN()
+ && !nai.networkMisc.allowBypass
+ && nc.getEstablishingVpnAppUid() != Process.SYSTEM_UID
+ && lp.getInterfaceName() != null
+ && (lp.hasIPv4DefaultRoute() || lp.hasIPv6DefaultRoute());
+ }
+
private void updateUids(NetworkAgentInfo nai, NetworkCapabilities prevNc,
NetworkCapabilities newNc) {
Set<UidRange> prevRanges = null == prevNc ? null : prevNc.getUids();
@@ -5784,6 +5857,12 @@
newRanges.removeAll(prevRangesCopy);
try {
+ // When updating the VPN uid routing rules, add the new range first then remove the old
+ // range. If old range were removed first, there would be a window between the old
+ // range being removed and the new range being added, during which UIDs contained
+ // in both ranges are not subject to any VPN routing rules. Adding new range before
+ // removing old range works because, unlike the filtering rules below, it's possible to
+ // add duplicate UID routing rules.
if (!newRanges.isEmpty()) {
final UidRange[] addedRangesArray = new UidRange[newRanges.size()];
newRanges.toArray(addedRangesArray);
@@ -5794,9 +5873,31 @@
prevRanges.toArray(removedRangesArray);
mNMS.removeVpnUidRanges(nai.network.netId, removedRangesArray);
}
+ final boolean wasFiltering = requiresVpnIsolation(nai, prevNc, nai.linkProperties);
+ final boolean shouldFilter = requiresVpnIsolation(nai, newNc, nai.linkProperties);
+ final String iface = nai.linkProperties.getInterfaceName();
+ // For VPN uid interface filtering, old ranges need to be removed before new ranges can
+ // be added, due to the range being expanded and stored as invidiual UIDs. For example
+ // the UIDs might be updated from [0, 99999] to ([0, 10012], [10014, 99999]) which means
+ // prevRanges = [0, 99999] while newRanges = [0, 10012], [10014, 99999]. If prevRanges
+ // were added first and then newRanges got removed later, there would be only one uid
+ // 10013 left. A consequence of removing old ranges before adding new ranges is that
+ // there is now a window of opportunity when the UIDs are not subject to any filtering.
+ // Note that this is in contrast with the (more robust) update of VPN routing rules
+ // above, where the addition of new ranges happens before the removal of old ranges.
+ // TODO Fix this window by computing an accurate diff on Set<UidRange>, so the old range
+ // to be removed will never overlap with the new range to be added.
+ if (wasFiltering && !prevRanges.isEmpty()) {
+ mPermissionMonitor.onVpnUidRangesRemoved(iface, prevRanges,
+ prevNc.getEstablishingVpnAppUid());
+ }
+ if (shouldFilter && !newRanges.isEmpty()) {
+ mPermissionMonitor.onVpnUidRangesAdded(iface, newRanges,
+ newNc.getEstablishingVpnAppUid());
+ }
} catch (Exception e) {
// Never crash!
- loge("Exception in updateUids: " + e);
+ loge("Exception in updateUids: ", e);
}
}
diff --git a/services/core/java/com/android/server/connectivity/PermissionMonitor.java b/services/core/java/com/android/server/connectivity/PermissionMonitor.java
index b6946023..f8582cd 100644
--- a/services/core/java/com/android/server/connectivity/PermissionMonitor.java
+++ b/services/core/java/com/android/server/connectivity/PermissionMonitor.java
@@ -37,22 +37,27 @@
import android.content.pm.PackageManagerInternal;
import android.content.pm.UserInfo;
import android.net.INetd;
+import android.net.UidRange;
import android.os.Build;
-import android.os.INetworkManagementService;
import android.os.RemoteException;
+import android.os.ServiceSpecificException;
import android.os.UserHandle;
import android.os.UserManager;
+import android.system.OsConstants;
import android.util.ArraySet;
import android.util.Log;
import android.util.SparseArray;
import android.util.SparseIntArray;
+import com.android.internal.annotations.GuardedBy;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.util.ArrayUtils;
+import com.android.internal.util.IndentingPrintWriter;
import com.android.server.LocalServices;
import com.android.server.SystemConfig;
import java.util.ArrayList;
+import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
@@ -60,6 +65,7 @@
import java.util.Map.Entry;
import java.util.Set;
+
/**
* A utility class to inform Netd of UID permisisons.
* Does a mass update at boot and then monitors for app install/remove.
@@ -73,18 +79,29 @@
protected static final Boolean NETWORK = Boolean.FALSE;
private static final int VERSION_Q = Build.VERSION_CODES.Q;
- private final Context mContext;
private final PackageManager mPackageManager;
private final UserManager mUserManager;
- private final INetworkManagementService mNMS;
private final INetd mNetd;
// Values are User IDs.
+ @GuardedBy("this")
private final Set<Integer> mUsers = new HashSet<>();
- // Keys are App IDs. Values are true for SYSTEM permission and false for NETWORK permission.
+ // Keys are app uids. Values are true for SYSTEM permission and false for NETWORK permission.
+ @GuardedBy("this")
private final Map<Integer, Boolean> mApps = new HashMap<>();
+ // Keys are active non-bypassable and fully-routed VPN's interface name, Values are uid ranges
+ // for apps under the VPN
+ @GuardedBy("this")
+ private final Map<String, Set<UidRange>> mVpnUidRanges = new HashMap<>();
+
+ // A set of appIds for apps across all users on the device. We track appIds instead of uids
+ // directly to reduce its size and also eliminate the need to update this set when user is
+ // added/removed.
+ @GuardedBy("this")
+ private final Set<Integer> mAllApps = new HashSet<>();
+
private class PackageListObserver implements PackageManagerInternal.PackageListObserver {
private int getPermissionForUid(int uid) {
@@ -118,12 +135,10 @@
}
}
- public PermissionMonitor(Context context, INetworkManagementService nms, INetd netdService) {
- mContext = context;
+ public PermissionMonitor(Context context, INetd netd) {
mPackageManager = context.getPackageManager();
- mUserManager = UserManager.get(context);
- mNMS = nms;
- mNetd = netdService;
+ mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
+ mNetd = netd;
}
// Intended to be called only once at startup, after the system is ready. Installs a broadcast
@@ -151,6 +166,7 @@
if (uid < 0) {
continue;
}
+ mAllApps.add(UserHandle.getAppId(uid));
boolean isNetwork = hasNetworkPermission(app);
boolean hasRestrictedPermission = hasRestrictedNetworkPermission(app);
@@ -270,10 +286,11 @@
}
}
- private int[] toIntArray(List<Integer> list) {
+ private int[] toIntArray(Collection<Integer> list) {
int[] array = new int[list.size()];
- for (int i = 0; i < list.size(); i++) {
- array[i] = list.get(i);
+ int i = 0;
+ for (Integer item : list) {
+ array[i++] = item;
}
return array;
}
@@ -289,11 +306,11 @@
}
try {
if (add) {
- mNMS.setPermission("NETWORK", toIntArray(network));
- mNMS.setPermission("SYSTEM", toIntArray(system));
+ mNetd.networkSetPermissionForUser(INetd.PERMISSION_NETWORK, toIntArray(network));
+ mNetd.networkSetPermissionForUser(INetd.PERMISSION_SYSTEM, toIntArray(system));
} else {
- mNMS.clearPermission(toIntArray(network));
- mNMS.clearPermission(toIntArray(system));
+ mNetd.networkClearPermissionForUser(toIntArray(network));
+ mNetd.networkClearPermissionForUser(toIntArray(system));
}
} catch (RemoteException e) {
loge("Exception when updating permissions: " + e);
@@ -376,6 +393,19 @@
apps.put(uid, permission);
update(mUsers, apps, true);
}
+
+ // If the newly-installed package falls within some VPN's uid range, update Netd with it.
+ // This needs to happen after the mApps update above, since removeBypassingUids() depends
+ // on mApps to check if the package can bypass VPN.
+ for (Map.Entry<String, Set<UidRange>> vpn : mVpnUidRanges.entrySet()) {
+ if (UidRange.containsUid(vpn.getValue(), uid)) {
+ final Set<Integer> changedUids = new HashSet<>();
+ changedUids.add(uid);
+ removeBypassingUids(changedUids, /* vpnAppUid */ -1);
+ updateVpnUids(vpn.getKey(), changedUids, true);
+ }
+ }
+ mAllApps.add(UserHandle.getAppId(uid));
}
/**
@@ -386,8 +416,23 @@
* @hide
*/
public synchronized void onPackageRemoved(int uid) {
- Map<Integer, Boolean> apps = new HashMap<>();
+ // If the newly-removed package falls within some VPN's uid range, update Netd with it.
+ // This needs to happen before the mApps update below, since removeBypassingUids() depends
+ // on mApps to check if the package can bypass VPN.
+ for (Map.Entry<String, Set<UidRange>> vpn : mVpnUidRanges.entrySet()) {
+ if (UidRange.containsUid(vpn.getValue(), uid)) {
+ final Set<Integer> changedUids = new HashSet<>();
+ changedUids.add(uid);
+ removeBypassingUids(changedUids, /* vpnAppUid */ -1);
+ updateVpnUids(vpn.getKey(), changedUids, false);
+ }
+ }
+ // If the package has been removed from all users on the device, clear it form mAllApps.
+ if (mPackageManager.getNameForUid(uid) == null) {
+ mAllApps.remove(UserHandle.getAppId(uid));
+ }
+ Map<Integer, Boolean> apps = new HashMap<>();
Boolean permission = null;
String[] packages = mPackageManager.getPackagesForUid(uid);
if (packages != null && packages.length > 0) {
@@ -443,6 +488,121 @@
}
/**
+ * Called when a new set of UID ranges are added to an active VPN network
+ *
+ * @param iface The active VPN network's interface name
+ * @param rangesToAdd The new UID ranges to be added to the network
+ * @param vpnAppUid The uid of the VPN app
+ */
+ public synchronized void onVpnUidRangesAdded(@NonNull String iface, Set<UidRange> rangesToAdd,
+ int vpnAppUid) {
+ // Calculate the list of new app uids under the VPN due to the new UID ranges and update
+ // Netd about them. Because mAllApps only contains appIds instead of uids, the result might
+ // be an overestimation if an app is not installed on the user on which the VPN is running,
+ // but that's safe.
+ final Set<Integer> changedUids = intersectUids(rangesToAdd, mAllApps);
+ removeBypassingUids(changedUids, vpnAppUid);
+ updateVpnUids(iface, changedUids, true);
+ if (mVpnUidRanges.containsKey(iface)) {
+ mVpnUidRanges.get(iface).addAll(rangesToAdd);
+ } else {
+ mVpnUidRanges.put(iface, new HashSet<UidRange>(rangesToAdd));
+ }
+ }
+
+ /**
+ * Called when a set of UID ranges are removed from an active VPN network
+ *
+ * @param iface The VPN network's interface name
+ * @param rangesToRemove Existing UID ranges to be removed from the VPN network
+ * @param vpnAppUid The uid of the VPN app
+ */
+ public synchronized void onVpnUidRangesRemoved(@NonNull String iface,
+ Set<UidRange> rangesToRemove, int vpnAppUid) {
+ // Calculate the list of app uids that are no longer under the VPN due to the removed UID
+ // ranges and update Netd about them.
+ final Set<Integer> changedUids = intersectUids(rangesToRemove, mAllApps);
+ removeBypassingUids(changedUids, vpnAppUid);
+ updateVpnUids(iface, changedUids, false);
+ Set<UidRange> existingRanges = mVpnUidRanges.getOrDefault(iface, null);
+ if (existingRanges == null) {
+ loge("Attempt to remove unknown vpn uid Range iface = " + iface);
+ return;
+ }
+ existingRanges.removeAll(rangesToRemove);
+ if (existingRanges.size() == 0) {
+ mVpnUidRanges.remove(iface);
+ }
+ }
+
+ /**
+ * Compute the intersection of a set of UidRanges and appIds. Returns a set of uids
+ * that satisfies:
+ * 1. falls into one of the UidRange
+ * 2. matches one of the appIds
+ */
+ private Set<Integer> intersectUids(Set<UidRange> ranges, Set<Integer> appIds) {
+ Set<Integer> result = new HashSet<>();
+ for (UidRange range : ranges) {
+ for (int userId = range.getStartUser(); userId <= range.getEndUser(); userId++) {
+ for (int appId : appIds) {
+ final int uid = UserHandle.getUid(userId, appId);
+ if (range.contains(uid)) {
+ result.add(uid);
+ }
+ }
+ }
+ }
+ return result;
+ }
+
+ /**
+ * Remove all apps which can elect to bypass the VPN from the list of uids
+ *
+ * An app can elect to bypass the VPN if it hold SYSTEM permission, or if its the active VPN
+ * app itself.
+ *
+ * @param uids The list of uids to operate on
+ * @param vpnAppUid The uid of the VPN app
+ */
+ private void removeBypassingUids(Set<Integer> uids, int vpnAppUid) {
+ uids.remove(vpnAppUid);
+ uids.removeIf(uid -> mApps.getOrDefault(uid, NETWORK) == SYSTEM);
+ }
+
+ /**
+ * Update netd about the list of uids that are under an active VPN connection which they cannot
+ * bypass.
+ *
+ * This is to instruct netd to set up appropriate filtering rules for these uids, such that they
+ * can only receive ingress packets from the VPN's tunnel interface (and loopback).
+ *
+ * @param iface the interface name of the active VPN connection
+ * @param add {@code true} if the uids are to be added to the interface, {@code false} if they
+ * are to be removed from the interface.
+ */
+ private void updateVpnUids(String iface, Set<Integer> uids, boolean add) {
+ if (uids.size() == 0) {
+ return;
+ }
+ try {
+ if (add) {
+ mNetd.firewallAddUidInterfaceRules(iface, toIntArray(uids));
+ } else {
+ mNetd.firewallRemoveUidInterfaceRules(toIntArray(uids));
+ }
+ } catch (ServiceSpecificException e) {
+ // Silently ignore exception when device does not support eBPF, otherwise just log
+ // the exception and do not crash
+ if (e.errorCode != OsConstants.EOPNOTSUPP) {
+ loge("Exception when updating permissions: ", e);
+ }
+ } catch (RemoteException e) {
+ loge("Exception when updating permissions: ", e);
+ }
+ }
+
+ /**
* Called by PackageListObserver when a package is installed/uninstalled. Send the updated
* permission information to netd.
*
@@ -528,6 +688,24 @@
}
}
+ /** Should only be used by unit tests */
+ @VisibleForTesting
+ public Set<UidRange> getVpnUidRanges(String iface) {
+ return mVpnUidRanges.get(iface);
+ }
+
+ /** Dump info to dumpsys */
+ public void dump(IndentingPrintWriter pw) {
+ pw.println("Interface filtering rules:");
+ pw.increaseIndent();
+ for (Map.Entry<String, Set<UidRange>> vpn : mVpnUidRanges.entrySet()) {
+ pw.println("Interface: " + vpn.getKey());
+ pw.println("UIDs: " + vpn.getValue().toString());
+ pw.println();
+ }
+ pw.decreaseIndent();
+ }
+
private static void log(String s) {
if (DBG) {
Log.d(TAG, s);
diff --git a/services/core/java/com/android/server/connectivity/Vpn.java b/services/core/java/com/android/server/connectivity/Vpn.java
index 8005dda..0271d3b 100644
--- a/services/core/java/com/android/server/connectivity/Vpn.java
+++ b/services/core/java/com/android/server/connectivity/Vpn.java
@@ -1604,12 +1604,7 @@
if (mNetworkInfo.isConnected()) {
return !appliesToUid(uid);
} else {
- for (UidRange uidRange : mBlockedUsers) {
- if (uidRange.contains(uid)) {
- return true;
- }
- }
- return false;
+ return UidRange.containsUid(mBlockedUsers, uid);
}
}
diff --git a/tests/net/java/android/net/RouteInfoTest.java b/tests/net/java/android/net/RouteInfoTest.java
index 831fefd..2edbd40 100644
--- a/tests/net/java/android/net/RouteInfoTest.java
+++ b/tests/net/java/android/net/RouteInfoTest.java
@@ -16,15 +16,16 @@
package android.net;
-import java.lang.reflect.Method;
-import java.net.InetAddress;
+import static android.net.RouteInfo.RTN_UNREACHABLE;
-import android.net.IpPrefix;
-import android.net.RouteInfo;
import android.os.Parcel;
+import android.test.suitebuilder.annotation.SmallTest;
import junit.framework.TestCase;
-import android.test.suitebuilder.annotation.SmallTest;
+
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.InetAddress;
public class RouteInfoTest extends TestCase {
@@ -152,67 +153,85 @@
}
public void testHostAndDefaultRoutes() {
- RouteInfo r;
+ RouteInfo r;
- r = new RouteInfo(Prefix("0.0.0.0/0"), Address("0.0.0.0"), "wlan0");
- assertFalse(r.isHostRoute());
- assertTrue(r.isDefaultRoute());
- assertTrue(r.isIPv4Default());
- assertFalse(r.isIPv6Default());
+ r = new RouteInfo(Prefix("0.0.0.0/0"), Address("0.0.0.0"), "wlan0");
+ assertFalse(r.isHostRoute());
+ assertTrue(r.isDefaultRoute());
+ assertTrue(r.isIPv4Default());
+ assertFalse(r.isIPv6Default());
- r = new RouteInfo(Prefix("::/0"), Address("::"), "wlan0");
- assertFalse(r.isHostRoute());
- assertTrue(r.isDefaultRoute());
- assertFalse(r.isIPv4Default());
- assertTrue(r.isIPv6Default());
+ r = new RouteInfo(Prefix("::/0"), Address("::"), "wlan0");
+ assertFalse(r.isHostRoute());
+ assertTrue(r.isDefaultRoute());
+ assertFalse(r.isIPv4Default());
+ assertTrue(r.isIPv6Default());
- r = new RouteInfo(Prefix("192.0.2.0/24"), null, "wlan0");
- assertFalse(r.isHostRoute());
- assertFalse(r.isDefaultRoute());
- assertFalse(r.isIPv4Default());
- assertFalse(r.isIPv6Default());
+ r = new RouteInfo(Prefix("192.0.2.0/24"), null, "wlan0");
+ assertFalse(r.isHostRoute());
+ assertFalse(r.isDefaultRoute());
+ assertFalse(r.isIPv4Default());
+ assertFalse(r.isIPv6Default());
- r = new RouteInfo(Prefix("2001:db8::/48"), null, "wlan0");
- assertFalse(r.isHostRoute());
- assertFalse(r.isDefaultRoute());
- assertFalse(r.isIPv4Default());
- assertFalse(r.isIPv6Default());
+ r = new RouteInfo(Prefix("2001:db8::/48"), null, "wlan0");
+ assertFalse(r.isHostRoute());
+ assertFalse(r.isDefaultRoute());
+ assertFalse(r.isIPv4Default());
+ assertFalse(r.isIPv6Default());
- r = new RouteInfo(Prefix("192.0.2.0/32"), Address("0.0.0.0"), "wlan0");
- assertTrue(r.isHostRoute());
- assertFalse(r.isDefaultRoute());
- assertFalse(r.isIPv4Default());
- assertFalse(r.isIPv6Default());
+ r = new RouteInfo(Prefix("192.0.2.0/32"), Address("0.0.0.0"), "wlan0");
+ assertTrue(r.isHostRoute());
+ assertFalse(r.isDefaultRoute());
+ assertFalse(r.isIPv4Default());
+ assertFalse(r.isIPv6Default());
- r = new RouteInfo(Prefix("2001:db8::/128"), Address("::"), "wlan0");
- assertTrue(r.isHostRoute());
- assertFalse(r.isDefaultRoute());
- assertFalse(r.isIPv4Default());
- assertFalse(r.isIPv6Default());
+ r = new RouteInfo(Prefix("2001:db8::/128"), Address("::"), "wlan0");
+ assertTrue(r.isHostRoute());
+ assertFalse(r.isDefaultRoute());
+ assertFalse(r.isIPv4Default());
+ assertFalse(r.isIPv6Default());
- r = new RouteInfo(Prefix("192.0.2.0/32"), null, "wlan0");
- assertTrue(r.isHostRoute());
- assertFalse(r.isDefaultRoute());
- assertFalse(r.isIPv4Default());
- assertFalse(r.isIPv6Default());
+ r = new RouteInfo(Prefix("192.0.2.0/32"), null, "wlan0");
+ assertTrue(r.isHostRoute());
+ assertFalse(r.isDefaultRoute());
+ assertFalse(r.isIPv4Default());
+ assertFalse(r.isIPv6Default());
- r = new RouteInfo(Prefix("2001:db8::/128"), null, "wlan0");
- assertTrue(r.isHostRoute());
- assertFalse(r.isDefaultRoute());
- assertFalse(r.isIPv4Default());
- assertFalse(r.isIPv6Default());
+ r = new RouteInfo(Prefix("2001:db8::/128"), null, "wlan0");
+ assertTrue(r.isHostRoute());
+ assertFalse(r.isDefaultRoute());
+ assertFalse(r.isIPv4Default());
+ assertFalse(r.isIPv6Default());
- r = new RouteInfo(Prefix("::/128"), Address("fe80::"), "wlan0");
- assertTrue(r.isHostRoute());
- assertFalse(r.isDefaultRoute());
- assertFalse(r.isIPv4Default());
- assertFalse(r.isIPv6Default());
+ r = new RouteInfo(Prefix("::/128"), Address("fe80::"), "wlan0");
+ assertTrue(r.isHostRoute());
+ assertFalse(r.isDefaultRoute());
+ assertFalse(r.isIPv4Default());
+ assertFalse(r.isIPv6Default());
- r = new RouteInfo(Prefix("0.0.0.0/32"), Address("192.0.2.1"), "wlan0");
- assertTrue(r.isHostRoute());
- assertFalse(r.isDefaultRoute());
- assertFalse(r.isIPv4Default());
- assertFalse(r.isIPv6Default());
+ r = new RouteInfo(Prefix("0.0.0.0/32"), Address("192.0.2.1"), "wlan0");
+ assertTrue(r.isHostRoute());
+ assertFalse(r.isDefaultRoute());
+ assertFalse(r.isIPv4Default());
+ assertFalse(r.isIPv6Default());
+
+ r = new RouteInfo(Prefix("0.0.0.0/32"), Address("192.0.2.1"), "wlan0");
+ assertTrue(r.isHostRoute());
+ assertFalse(r.isDefaultRoute());
+ assertFalse(r.isIPv4Default());
+ assertFalse(r.isIPv6Default());
+
+ r = new RouteInfo(new IpPrefix(Inet4Address.ANY, 0), RTN_UNREACHABLE);
+ assertFalse(r.isHostRoute());
+ assertFalse(r.isDefaultRoute());
+ assertFalse(r.isIPv4Default());
+ assertFalse(r.isIPv6Default());
+
+ r = new RouteInfo(new IpPrefix(Inet6Address.ANY, 0), RTN_UNREACHABLE);
+ assertFalse(r.isHostRoute());
+ assertFalse(r.isDefaultRoute());
+ assertFalse(r.isIPv4Default());
+ assertFalse(r.isIPv6Default());
}
public void testTruncation() {
diff --git a/tests/net/java/com/android/server/ConnectivityServiceTest.java b/tests/net/java/com/android/server/ConnectivityServiceTest.java
index c2fc0b3..ee9d7853 100644
--- a/tests/net/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/net/java/com/android/server/ConnectivityServiceTest.java
@@ -16,6 +16,8 @@
package com.android.server;
+import static android.content.pm.PackageManager.GET_PERMISSIONS;
+import static android.content.pm.PackageManager.MATCH_ANY_USER;
import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
import static android.net.ConnectivityManager.NETID_UNSET;
import static android.net.ConnectivityManager.PRIVATE_DNS_MODE_OFF;
@@ -60,11 +62,13 @@
import static android.net.NetworkPolicyManager.RULE_NONE;
import static android.net.NetworkPolicyManager.RULE_REJECT_ALL;
import static android.net.NetworkPolicyManager.RULE_REJECT_METERED;
+import static android.net.RouteInfo.RTN_UNREACHABLE;
import static com.android.internal.util.TestUtils.waitForIdleHandler;
import static com.android.internal.util.TestUtils.waitForIdleLooper;
import static com.android.internal.util.TestUtils.waitForIdleSerialExecutor;
+import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
@@ -72,12 +76,14 @@
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
+import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Mockito.any;
import static org.mockito.Mockito.atLeastOnce;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.doNothing;
import static org.mockito.Mockito.eq;
+import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.reset;
@@ -97,6 +103,10 @@
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.UserInfo;
import android.content.res.Resources;
import android.net.ConnectivityManager;
import android.net.ConnectivityManager.NetworkCallback;
@@ -151,6 +161,7 @@
import android.os.RemoteException;
import android.os.SystemClock;
import android.os.UserHandle;
+import android.os.UserManager;
import android.provider.Settings;
import android.system.Os;
import android.test.mock.MockContentResolver;
@@ -186,6 +197,7 @@
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.ArgumentCaptor;
+import org.mockito.InOrder;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.mockito.Spy;
@@ -194,6 +206,7 @@
import java.io.IOException;
import java.net.DatagramSocket;
import java.net.Inet4Address;
+import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
@@ -261,6 +274,8 @@
@Mock IDnsResolver mMockDnsResolver;
@Mock INetd mMockNetd;
@Mock NetworkStackClient mNetworkStack;
+ @Mock PackageManager mPackageManager;
+ @Mock UserManager mUserManager;
private ArgumentCaptor<String[]> mStringArrayCaptor = ArgumentCaptor.forClass(String[].class);
@@ -331,6 +346,7 @@
if (Context.CONNECTIVITY_SERVICE.equals(name)) return mCm;
if (Context.NOTIFICATION_SERVICE.equals(name)) return mock(NotificationManager.class);
if (Context.NETWORK_STACK_SERVICE.equals(name)) return mNetworkStack;
+ if (Context.USER_SERVICE.equals(name)) return mUserManager;
return super.getSystemService(name);
}
@@ -343,6 +359,11 @@
public Resources getResources() {
return mResources;
}
+
+ @Override
+ public PackageManager getPackageManager() {
+ return mPackageManager;
+ }
}
public void waitForIdle(int timeoutMsAsInt) {
@@ -1057,7 +1078,7 @@
public WrappedConnectivityService(Context context, INetworkManagementService netManager,
INetworkStatsService statsService, INetworkPolicyManager policyManager,
IpConnectivityLog log, INetd netd, IDnsResolver dnsResolver) {
- super(context, netManager, statsService, policyManager, dnsResolver, log);
+ super(context, netManager, statsService, policyManager, dnsResolver, log, netd);
mNetd = netd;
mLingerDelayMs = TEST_LINGER_DELAY_MS;
}
@@ -1196,6 +1217,11 @@
fail("ConditionVariable was blocked for more than " + TIMEOUT_MS + "ms");
}
+ private static final int VPN_USER = 0;
+ private static final int APP1_UID = UserHandle.getUid(VPN_USER, 10100);
+ private static final int APP2_UID = UserHandle.getUid(VPN_USER, 10101);
+ private static final int VPN_UID = UserHandle.getUid(VPN_USER, 10043);
+
@Before
public void setUp() throws Exception {
mContext = InstrumentationRegistry.getContext();
@@ -1203,6 +1229,17 @@
MockitoAnnotations.initMocks(this);
when(mMetricsService.defaultNetworkMetrics()).thenReturn(mDefaultNetworkMetrics);
+ when(mUserManager.getUsers(eq(true))).thenReturn(
+ Arrays.asList(new UserInfo[] {
+ new UserInfo(VPN_USER, "", 0),
+ }));
+ when(mPackageManager.getInstalledPackages(eq(GET_PERMISSIONS | MATCH_ANY_USER))).thenReturn(
+ Arrays.asList(new PackageInfo[] {
+ buildPackageInfo(/* SYSTEM */ false, APP1_UID),
+ buildPackageInfo(/* SYSTEM */ false, APP2_UID),
+ buildPackageInfo(/* SYSTEM */ false, VPN_UID)
+ }));
+
// InstrumentationTestRunner prepares a looper, but AndroidJUnitRunner does not.
// http://b/25897652 .
if (Looper.myLooper() == null) {
@@ -6129,4 +6166,165 @@
assertEquals(testProxyInfo, mService.getProxyForNetwork(mWiFiNetworkAgent.getNetwork()));
assertEquals(testProxyInfo, mService.getProxyForNetwork(null));
}
+
+ @Test
+ public void testFullyRoutedVpnResultsInInterfaceFilteringRules() throws Exception {
+ LinkProperties lp = new LinkProperties();
+ lp.setInterfaceName("tun0");
+ lp.addRoute(new RouteInfo(new IpPrefix(Inet4Address.ANY, 0), null));
+ // The uid range needs to cover the test app so the network is visible to it.
+ final Set<UidRange> vpnRange = Collections.singleton(UidRange.createForUser(VPN_USER));
+ final MockNetworkAgent vpnNetworkAgent = establishVpn(lp, VPN_UID, vpnRange);
+
+ // Connected VPN should have interface rules set up. There are two expected invocations,
+ // one during VPN uid update, one during VPN LinkProperties update
+ ArgumentCaptor<int[]> uidCaptor = ArgumentCaptor.forClass(int[].class);
+ verify(mMockNetd, times(2)).firewallAddUidInterfaceRules(eq("tun0"), uidCaptor.capture());
+ assertContainsExactly(uidCaptor.getAllValues().get(0), APP1_UID, APP2_UID);
+ assertContainsExactly(uidCaptor.getAllValues().get(1), APP1_UID, APP2_UID);
+ assertTrue(mService.mPermissionMonitor.getVpnUidRanges("tun0").equals(vpnRange));
+
+ vpnNetworkAgent.disconnect();
+ waitForIdle();
+
+ // Disconnected VPN should have interface rules removed
+ verify(mMockNetd).firewallRemoveUidInterfaceRules(uidCaptor.capture());
+ assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID);
+ assertNull(mService.mPermissionMonitor.getVpnUidRanges("tun0"));
+ }
+
+ @Test
+ public void testLegacyVpnDoesNotResultInInterfaceFilteringRule() throws Exception {
+ LinkProperties lp = new LinkProperties();
+ lp.setInterfaceName("tun0");
+ lp.addRoute(new RouteInfo(new IpPrefix(Inet4Address.ANY, 0), null));
+ // The uid range needs to cover the test app so the network is visible to it.
+ final Set<UidRange> vpnRange = Collections.singleton(UidRange.createForUser(VPN_USER));
+ final MockNetworkAgent vpnNetworkAgent = establishVpn(lp, Process.SYSTEM_UID, vpnRange);
+
+ // Legacy VPN should not have interface rules set up
+ verify(mMockNetd, never()).firewallAddUidInterfaceRules(any(), any());
+ }
+
+ public void testLocalIpv4OnlyVpnDoesNotResultInInterfaceFilteringRule()
+ throws Exception {
+ LinkProperties lp = new LinkProperties();
+ lp.setInterfaceName("tun0");
+ lp.addRoute(new RouteInfo(new IpPrefix("192.0.2.0/24"), null, "tun0"));
+ lp.addRoute(new RouteInfo(new IpPrefix(Inet6Address.ANY, 0), RTN_UNREACHABLE));
+ // The uid range needs to cover the test app so the network is visible to it.
+ final Set<UidRange> vpnRange = Collections.singleton(UidRange.createForUser(VPN_USER));
+ final MockNetworkAgent vpnNetworkAgent = establishVpn(lp, Process.SYSTEM_UID, vpnRange);
+
+ // IPv6 unreachable route should not be misinterpreted as a default route
+ verify(mMockNetd, never()).firewallAddUidInterfaceRules(any(), any());
+ }
+
+ @Test
+ public void testVpnHandoverChangesInterfaceFilteringRule() throws Exception {
+ LinkProperties lp = new LinkProperties();
+ lp.setInterfaceName("tun0");
+ lp.addRoute(new RouteInfo(new IpPrefix(Inet4Address.ANY, 0), null));
+ // The uid range needs to cover the test app so the network is visible to it.
+ final Set<UidRange> vpnRange = Collections.singleton(UidRange.createForUser(VPN_USER));
+ final MockNetworkAgent vpnNetworkAgent = establishVpn(lp, VPN_UID, vpnRange);
+
+ // Connected VPN should have interface rules set up. There are two expected invocations,
+ // one during VPN uid update, one during VPN LinkProperties update
+ ArgumentCaptor<int[]> uidCaptor = ArgumentCaptor.forClass(int[].class);
+ verify(mMockNetd, times(2)).firewallAddUidInterfaceRules(eq("tun0"), uidCaptor.capture());
+ assertContainsExactly(uidCaptor.getAllValues().get(0), APP1_UID, APP2_UID);
+ assertContainsExactly(uidCaptor.getAllValues().get(1), APP1_UID, APP2_UID);
+
+ reset(mMockNetd);
+ InOrder inOrder = inOrder(mMockNetd);
+ lp.setInterfaceName("tun1");
+ vpnNetworkAgent.sendLinkProperties(lp);
+ waitForIdle();
+ // VPN handover (switch to a new interface) should result in rules being updated (old rules
+ // removed first, then new rules added)
+ inOrder.verify(mMockNetd).firewallRemoveUidInterfaceRules(uidCaptor.capture());
+ assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID);
+ inOrder.verify(mMockNetd).firewallAddUidInterfaceRules(eq("tun1"), uidCaptor.capture());
+ assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID);
+
+ reset(mMockNetd);
+ lp = new LinkProperties();
+ lp.setInterfaceName("tun1");
+ lp.addRoute(new RouteInfo(new IpPrefix("192.0.2.0/24"), null, "tun1"));
+ vpnNetworkAgent.sendLinkProperties(lp);
+ waitForIdle();
+ // VPN not routing everything should no longer have interface filtering rules
+ verify(mMockNetd).firewallRemoveUidInterfaceRules(uidCaptor.capture());
+ assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID);
+
+ reset(mMockNetd);
+ lp = new LinkProperties();
+ lp.setInterfaceName("tun1");
+ lp.addRoute(new RouteInfo(new IpPrefix(Inet6Address.ANY, 0), null));
+ vpnNetworkAgent.sendLinkProperties(lp);
+ waitForIdle();
+ // Back to routing all IPv6 traffic should have filtering rules
+ verify(mMockNetd).firewallAddUidInterfaceRules(eq("tun1"), uidCaptor.capture());
+ assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID);
+ }
+
+ @Test
+ public void testUidUpdateChangesInterfaceFilteringRule() throws Exception {
+ LinkProperties lp = new LinkProperties();
+ lp.setInterfaceName("tun0");
+ lp.addRoute(new RouteInfo(new IpPrefix(Inet6Address.ANY, 0), null));
+ // The uid range needs to cover the test app so the network is visible to it.
+ final UidRange vpnRange = UidRange.createForUser(VPN_USER);
+ final MockNetworkAgent vpnNetworkAgent = establishVpn(lp, VPN_UID,
+ Collections.singleton(vpnRange));
+
+ reset(mMockNetd);
+ InOrder inOrder = inOrder(mMockNetd);
+
+ // Update to new range which is old range minus APP1, i.e. only APP2
+ final Set<UidRange> newRanges = new HashSet<>(Arrays.asList(
+ new UidRange(vpnRange.start, APP1_UID - 1),
+ new UidRange(APP1_UID + 1, vpnRange.stop)));
+ vpnNetworkAgent.setUids(newRanges);
+ waitForIdle();
+
+ ArgumentCaptor<int[]> uidCaptor = ArgumentCaptor.forClass(int[].class);
+ // Verify old rules are removed before new rules are added
+ inOrder.verify(mMockNetd).firewallRemoveUidInterfaceRules(uidCaptor.capture());
+ assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID);
+ inOrder.verify(mMockNetd).firewallAddUidInterfaceRules(eq("tun0"), uidCaptor.capture());
+ assertContainsExactly(uidCaptor.getValue(), APP2_UID);
+ }
+
+
+ private MockNetworkAgent establishVpn(LinkProperties lp, int establishingUid,
+ Set<UidRange> vpnRange) {
+ final MockNetworkAgent vpnNetworkAgent = new MockNetworkAgent(TRANSPORT_VPN, lp);
+ vpnNetworkAgent.getNetworkCapabilities().setEstablishingVpnAppUid(establishingUid);
+ mMockVpn.setNetworkAgent(vpnNetworkAgent);
+ mMockVpn.connect();
+ mMockVpn.setUids(vpnRange);
+ vpnNetworkAgent.connect(true);
+ waitForIdle();
+ return vpnNetworkAgent;
+ }
+
+ private void assertContainsExactly(int[] actual, int... expected) {
+ int[] sortedActual = Arrays.copyOf(actual, actual.length);
+ int[] sortedExpected = Arrays.copyOf(expected, expected.length);
+ Arrays.sort(sortedActual);
+ Arrays.sort(sortedExpected);
+ assertArrayEquals(sortedExpected, sortedActual);
+ }
+
+ private static PackageInfo buildPackageInfo(boolean hasSystemPermission, int uid) {
+ final PackageInfo packageInfo = new PackageInfo();
+ packageInfo.requestedPermissions = new String[0];
+ packageInfo.applicationInfo = new ApplicationInfo();
+ packageInfo.applicationInfo.privateFlags = 0;
+ packageInfo.applicationInfo.uid = UserHandle.getUid(UserHandle.USER_SYSTEM,
+ UserHandle.getAppId(uid));
+ return packageInfo;
+ }
}
diff --git a/tests/net/java/com/android/server/connectivity/PermissionMonitorTest.java b/tests/net/java/com/android/server/connectivity/PermissionMonitorTest.java
index 106cd1f..62a4718 100644
--- a/tests/net/java/com/android/server/connectivity/PermissionMonitorTest.java
+++ b/tests/net/java/com/android/server/connectivity/PermissionMonitorTest.java
@@ -28,6 +28,7 @@
import static android.content.pm.ApplicationInfo.PRIVATE_FLAG_VENDOR;
import static android.content.pm.PackageInfo.REQUESTED_PERMISSION_GRANTED;
import static android.content.pm.PackageManager.GET_PERMISSIONS;
+import static android.content.pm.PackageManager.MATCH_ANY_USER;
import static android.os.Process.SYSTEM_UID;
import static com.android.server.connectivity.PermissionMonitor.NETWORK;
@@ -36,13 +37,16 @@
import static junit.framework.Assert.fail;
import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
+import static org.mockito.AdditionalMatchers.aryEq;
import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.Matchers.anyString;
-import static org.mockito.Mockito.anyInt;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.doReturn;
-import static org.mockito.Mockito.eq;
+import static org.mockito.Mockito.reset;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
@@ -53,10 +57,12 @@
import android.content.pm.PackageList;
import android.content.pm.PackageManager;
import android.content.pm.PackageManagerInternal;
+import android.content.pm.UserInfo;
import android.net.INetd;
+import android.net.UidRange;
import android.os.Build;
-import android.os.INetworkManagementService;
import android.os.UserHandle;
+import android.os.UserManager;
import android.util.SparseIntArray;
import androidx.test.filters.SmallTest;
@@ -73,7 +79,12 @@
import org.mockito.invocation.InvocationOnMock;
import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Set;
+
@RunWith(AndroidJUnit4.class)
@SmallTest
@@ -84,10 +95,12 @@
private static final int MOCK_UID2 = 10086;
private static final int SYSTEM_UID1 = 1000;
private static final int SYSTEM_UID2 = 1008;
+ private static final int VPN_UID = 10002;
private static final String MOCK_PACKAGE1 = "appName1";
private static final String MOCK_PACKAGE2 = "appName2";
private static final String SYSTEM_PACKAGE1 = "sysName1";
private static final String SYSTEM_PACKAGE2 = "sysName2";
+ private static final String VPN_PACKAGE = "vpnApp";
private static final String PARTITION_SYSTEM = "system";
private static final String PARTITION_OEM = "oem";
private static final String PARTITION_PRODUCT = "product";
@@ -97,9 +110,9 @@
@Mock private Context mContext;
@Mock private PackageManager mPackageManager;
- @Mock private INetworkManagementService mNMS;
@Mock private INetd mNetdService;
@Mock private PackageManagerInternal mMockPmi;
+ @Mock private UserManager mUserManager;
private PackageManagerInternal.PackageListObserver mObserver;
private PermissionMonitor mPermissionMonitor;
@@ -108,7 +121,14 @@
public void setUp() throws Exception {
MockitoAnnotations.initMocks(this);
when(mContext.getPackageManager()).thenReturn(mPackageManager);
- mPermissionMonitor = spy(new PermissionMonitor(mContext, mNMS, mNetdService));
+ when(mContext.getSystemService(eq(Context.USER_SERVICE))).thenReturn(mUserManager);
+ when(mUserManager.getUsers(eq(true))).thenReturn(
+ Arrays.asList(new UserInfo[] {
+ new UserInfo(MOCK_USER1, "", 0),
+ new UserInfo(MOCK_USER2, "", 0),
+ }));
+
+ mPermissionMonitor = spy(new PermissionMonitor(mContext, mNetdService));
LocalServices.removeServiceForTest(PackageManagerInternal.class);
LocalServices.addService(PackageManagerInternal.class, mMockPmi);
@@ -134,7 +154,7 @@
return mPermissionMonitor.hasUseBackgroundNetworksPermission(uid);
}
- private PackageInfo packageInfoWithPermissions(String[] permissions, String partition) {
+ private static PackageInfo packageInfoWithPermissions(String[] permissions, String partition) {
int[] requestedPermissionsFlags = new int[permissions.length];
for (int i = 0; i < permissions.length; i++) {
requestedPermissionsFlags[i] = REQUESTED_PERMISSION_GRANTED;
@@ -143,7 +163,7 @@
requestedPermissionsFlags);
}
- private PackageInfo packageInfoWithPermissions(String[] permissions, String partition,
+ private static PackageInfo packageInfoWithPermissions(String[] permissions, String partition,
int[] requestedPermissionsFlags) {
final PackageInfo packageInfo = new PackageInfo();
packageInfo.requestedPermissions = permissions;
@@ -165,6 +185,18 @@
return packageInfo;
}
+ private static PackageInfo buildPackageInfo(boolean hasSystemPermission, int uid, int userId) {
+ final PackageInfo pkgInfo;
+ if (hasSystemPermission) {
+ pkgInfo = packageInfoWithPermissions(new String[] {CHANGE_NETWORK_STATE, NETWORK_STACK},
+ PARTITION_SYSTEM);
+ } else {
+ pkgInfo = packageInfoWithPermissions(new String[] {}, "");
+ }
+ pkgInfo.applicationInfo.uid = UserHandle.getUid(userId, UserHandle.getAppId(uid));
+ return pkgInfo;
+ }
+
@Test
public void testHasPermission() {
PackageInfo app = packageInfoWithPermissions(new String[] {}, PARTITION_SYSTEM);
@@ -245,14 +277,14 @@
assertFalse(hasBgPermission(PARTITION_VENDOR, VERSION_Q, MOCK_UID1, CHANGE_WIFI_STATE));
}
- private class NMSMonitor {
+ private class NetdMonitor {
private final HashMap<Integer, Boolean> mApps = new HashMap<>();
- NMSMonitor(INetworkManagementService mockNMS) throws Exception {
+ NetdMonitor(INetd mockNetd) throws Exception {
// Add hook to verify and track result of setPermission.
doAnswer((InvocationOnMock invocation) -> {
final Object[] args = invocation.getArguments();
- final Boolean isSystem = args[0].equals("SYSTEM");
+ final Boolean isSystem = args[0].equals(INetd.PERMISSION_SYSTEM);
for (final int uid : (int[]) args[1]) {
// TODO: Currently, permission monitor will send duplicate commands for each uid
// corresponding to each user. Need to fix that and uncomment below test.
@@ -262,7 +294,7 @@
mApps.put(uid, isSystem);
}
return null;
- }).when(mockNMS).setPermission(anyString(), any(int[].class));
+ }).when(mockNetd).networkSetPermissionForUser(anyInt(), any(int[].class));
// Add hook to verify and track result of clearPermission.
doAnswer((InvocationOnMock invocation) -> {
@@ -276,7 +308,7 @@
mApps.remove(uid);
}
return null;
- }).when(mockNMS).clearPermission(any(int[].class));
+ }).when(mockNetd).networkClearPermissionForUser(any(int[].class));
}
public void expectPermission(Boolean permission, int[] users, int[] apps) {
@@ -307,7 +339,7 @@
@Test
public void testUserAndPackageAddRemove() throws Exception {
- final NMSMonitor mNMSMonitor = new NMSMonitor(mNMS);
+ final NetdMonitor mNetdMonitor = new NetdMonitor(mNetdService);
// MOCK_UID1: MOCK_PACKAGE1 only has network permission.
// SYSTEM_UID: SYSTEM_PACKAGE1 has system permission.
@@ -323,48 +355,123 @@
// Add SYSTEM_PACKAGE2, expect only have network permission.
mPermissionMonitor.onUserAdded(MOCK_USER1);
addPackageForUsers(new int[]{MOCK_USER1}, SYSTEM_PACKAGE2, SYSTEM_UID);
- mNMSMonitor.expectPermission(NETWORK, new int[]{MOCK_USER1}, new int[]{SYSTEM_UID});
+ mNetdMonitor.expectPermission(NETWORK, new int[]{MOCK_USER1}, new int[]{SYSTEM_UID});
// Add SYSTEM_PACKAGE1, expect permission escalate.
addPackageForUsers(new int[]{MOCK_USER1}, SYSTEM_PACKAGE1, SYSTEM_UID);
- mNMSMonitor.expectPermission(SYSTEM, new int[]{MOCK_USER1}, new int[]{SYSTEM_UID});
+ mNetdMonitor.expectPermission(SYSTEM, new int[]{MOCK_USER1}, new int[]{SYSTEM_UID});
mPermissionMonitor.onUserAdded(MOCK_USER2);
- mNMSMonitor.expectPermission(SYSTEM, new int[]{MOCK_USER1, MOCK_USER2},
+ mNetdMonitor.expectPermission(SYSTEM, new int[]{MOCK_USER1, MOCK_USER2},
new int[]{SYSTEM_UID});
addPackageForUsers(new int[]{MOCK_USER1, MOCK_USER2}, MOCK_PACKAGE1, MOCK_UID1);
- mNMSMonitor.expectPermission(SYSTEM, new int[]{MOCK_USER1, MOCK_USER2},
+ mNetdMonitor.expectPermission(SYSTEM, new int[]{MOCK_USER1, MOCK_USER2},
new int[]{SYSTEM_UID});
- mNMSMonitor.expectPermission(NETWORK, new int[]{MOCK_USER1, MOCK_USER2},
+ mNetdMonitor.expectPermission(NETWORK, new int[]{MOCK_USER1, MOCK_USER2},
new int[]{MOCK_UID1});
// Remove MOCK_UID1, expect no permission left for all user.
mPermissionMonitor.onPackageRemoved(MOCK_UID1);
removePackageForUsers(new int[]{MOCK_USER1, MOCK_USER2}, MOCK_UID1);
- mNMSMonitor.expectNoPermission(new int[]{MOCK_USER1, MOCK_USER2}, new int[]{MOCK_UID1});
+ mNetdMonitor.expectNoPermission(new int[]{MOCK_USER1, MOCK_USER2}, new int[]{MOCK_UID1});
// Remove SYSTEM_PACKAGE1, expect permission downgrade.
when(mPackageManager.getPackagesForUid(anyInt())).thenReturn(new String[]{SYSTEM_PACKAGE2});
removePackageForUsers(new int[]{MOCK_USER1, MOCK_USER2}, SYSTEM_UID);
- mNMSMonitor.expectPermission(NETWORK, new int[]{MOCK_USER1, MOCK_USER2},
+ mNetdMonitor.expectPermission(NETWORK, new int[]{MOCK_USER1, MOCK_USER2},
new int[]{SYSTEM_UID});
mPermissionMonitor.onUserRemoved(MOCK_USER1);
- mNMSMonitor.expectPermission(NETWORK, new int[]{MOCK_USER2}, new int[]{SYSTEM_UID});
+ mNetdMonitor.expectPermission(NETWORK, new int[]{MOCK_USER2}, new int[]{SYSTEM_UID});
// Remove all packages, expect no permission left.
when(mPackageManager.getPackagesForUid(anyInt())).thenReturn(new String[]{});
removePackageForUsers(new int[]{MOCK_USER2}, SYSTEM_UID);
- mNMSMonitor.expectNoPermission(new int[]{MOCK_USER1, MOCK_USER2},
+ mNetdMonitor.expectNoPermission(new int[]{MOCK_USER1, MOCK_USER2},
new int[]{SYSTEM_UID, MOCK_UID1});
// Remove last user, expect no redundant clearPermission is invoked.
mPermissionMonitor.onUserRemoved(MOCK_USER2);
- mNMSMonitor.expectNoPermission(new int[]{MOCK_USER1, MOCK_USER2},
+ mNetdMonitor.expectNoPermission(new int[]{MOCK_USER1, MOCK_USER2},
new int[]{SYSTEM_UID, MOCK_UID1});
}
+ @Test
+ public void testUidFilteringDuringVpnConnectDisconnectAndUidUpdates() throws Exception {
+ when(mPackageManager.getInstalledPackages(eq(GET_PERMISSIONS | MATCH_ANY_USER))).thenReturn(
+ Arrays.asList(new PackageInfo[] {
+ buildPackageInfo(/* SYSTEM */ true, SYSTEM_UID1, MOCK_USER1),
+ buildPackageInfo(/* SYSTEM */ false, MOCK_UID1, MOCK_USER1),
+ buildPackageInfo(/* SYSTEM */ false, MOCK_UID2, MOCK_USER1),
+ buildPackageInfo(/* SYSTEM */ false, VPN_UID, MOCK_USER1)
+ }));
+ when(mPackageManager.getPackageInfo(eq(MOCK_PACKAGE1), eq(GET_PERMISSIONS))).thenReturn(
+ buildPackageInfo(false, MOCK_UID1, MOCK_USER1));
+ mPermissionMonitor.startMonitoring();
+ // Every app on user 0 except MOCK_UID2 are under VPN.
+ final Set<UidRange> vpnRange1 = new HashSet<>(Arrays.asList(new UidRange[] {
+ new UidRange(0, MOCK_UID2 - 1),
+ new UidRange(MOCK_UID2 + 1, UserHandle.PER_USER_RANGE - 1)}));
+ final Set<UidRange> vpnRange2 = Collections.singleton(new UidRange(MOCK_UID2, MOCK_UID2));
+
+ // When VPN is connected, expect a rule to be set up for user app MOCK_UID1
+ mPermissionMonitor.onVpnUidRangesAdded("tun0", vpnRange1, VPN_UID);
+ verify(mNetdService).firewallAddUidInterfaceRules(eq("tun0"),
+ aryEq(new int[] {MOCK_UID1}));
+
+ reset(mNetdService);
+
+ // When MOCK_UID1 package is uninstalled and reinstalled, expect Netd to be updated
+ mPermissionMonitor.onPackageRemoved(UserHandle.getUid(MOCK_USER1, MOCK_UID1));
+ verify(mNetdService).firewallRemoveUidInterfaceRules(aryEq(new int[] {MOCK_UID1}));
+ mPermissionMonitor.onPackageAdded(MOCK_PACKAGE1, UserHandle.getUid(MOCK_USER1, MOCK_UID1));
+ verify(mNetdService).firewallAddUidInterfaceRules(eq("tun0"),
+ aryEq(new int[] {MOCK_UID1}));
+
+ reset(mNetdService);
+
+ // During VPN uid update (vpnRange1 -> vpnRange2), ConnectivityService first deletes the
+ // old UID rules then adds the new ones. Expect netd to be updated
+ mPermissionMonitor.onVpnUidRangesRemoved("tun0", vpnRange1, VPN_UID);
+ verify(mNetdService).firewallRemoveUidInterfaceRules(aryEq(new int[] {MOCK_UID1}));
+ mPermissionMonitor.onVpnUidRangesAdded("tun0", vpnRange2, VPN_UID);
+ verify(mNetdService).firewallAddUidInterfaceRules(eq("tun0"),
+ aryEq(new int[] {MOCK_UID2}));
+
+ reset(mNetdService);
+
+ // When VPN is disconnected, expect rules to be torn down
+ mPermissionMonitor.onVpnUidRangesRemoved("tun0", vpnRange2, VPN_UID);
+ verify(mNetdService).firewallRemoveUidInterfaceRules(aryEq(new int[] {MOCK_UID2}));
+ assertNull(mPermissionMonitor.getVpnUidRanges("tun0"));
+ }
+
+ @Test
+ public void testUidFilteringDuringPackageInstallAndUninstall() throws Exception {
+ when(mPackageManager.getInstalledPackages(eq(GET_PERMISSIONS | MATCH_ANY_USER))).thenReturn(
+ Arrays.asList(new PackageInfo[] {
+ buildPackageInfo(true, SYSTEM_UID1, MOCK_USER1),
+ buildPackageInfo(false, VPN_UID, MOCK_USER1)
+ }));
+ when(mPackageManager.getPackageInfo(eq(MOCK_PACKAGE1), eq(GET_PERMISSIONS))).thenReturn(
+ buildPackageInfo(false, MOCK_UID1, MOCK_USER1));
+
+ mPermissionMonitor.startMonitoring();
+ final Set<UidRange> vpnRange = Collections.singleton(UidRange.createForUser(MOCK_USER1));
+ mPermissionMonitor.onVpnUidRangesAdded("tun0", vpnRange, VPN_UID);
+
+ // Newly-installed package should have uid rules added
+ mPermissionMonitor.onPackageAdded(MOCK_PACKAGE1, UserHandle.getUid(MOCK_USER1, MOCK_UID1));
+ verify(mNetdService).firewallAddUidInterfaceRules(eq("tun0"),
+ aryEq(new int[] {MOCK_UID1}));
+
+ // Removed package should have its uid rules removed
+ mPermissionMonitor.onPackageRemoved(UserHandle.getUid(MOCK_USER1, MOCK_UID1));
+ verify(mNetdService).firewallRemoveUidInterfaceRules(aryEq(new int[] {MOCK_UID1}));
+ }
+
+
// Normal package add/remove operations will trigger multiple intent for uids corresponding to
// each user. To simulate generic package operations, the onPackageAdded/Removed will need to be
// called multiple times with the uid corresponding to each user.