Merge "Add new callback to inform blocking of network on specific uid."
diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
index 1fbfa40..4714587 100644
--- a/core/java/android/net/ConnectivityManager.java
+++ b/core/java/android/net/ConnectivityManager.java
@@ -2816,10 +2816,11 @@
* @param network The {@link Network} of the satisfying network.
* @param networkCapabilities The {@link NetworkCapabilities} of the satisfying network.
* @param linkProperties The {@link LinkProperties} of the satisfying network.
+ * @param blocked Whether access to the {@link Network} is blocked due to system policy.
* @hide
*/
public void onAvailable(Network network, NetworkCapabilities networkCapabilities,
- LinkProperties linkProperties) {
+ LinkProperties linkProperties, boolean blocked) {
// Internally only this method is called when a new network is available, and
// it calls the callback in the same way and order that older versions used
// to call so as not to change the behavior.
@@ -2830,6 +2831,7 @@
}
onCapabilitiesChanged(network, networkCapabilities);
onLinkPropertiesChanged(network, linkProperties);
+ onBlockedStatusChanged(network, blocked);
}
/**
@@ -2837,7 +2839,8 @@
* This callback may be called more than once if the {@link Network} that is
* satisfying the request changes. This will always immediately be followed by a
* call to {@link #onCapabilitiesChanged(Network, NetworkCapabilities)} then by a
- * call to {@link #onLinkPropertiesChanged(Network, LinkProperties)}.
+ * call to {@link #onLinkPropertiesChanged(Network, LinkProperties)}, and a call to
+ * {@link #onBlockedStatusChanged(Network, boolean)}.
*
* @param network The {@link Network} of the satisfying network.
*/
@@ -2916,6 +2919,14 @@
*/
public void onNetworkResumed(Network network) {}
+ /**
+ * Called when access to the specified network is blocked or unblocked.
+ *
+ * @param network The {@link Network} whose blocked status has changed.
+ * @param blocked The blocked status of this {@link Network}.
+ */
+ public void onBlockedStatusChanged(Network network, boolean blocked) {}
+
private NetworkRequest networkRequest;
}
@@ -2962,6 +2973,8 @@
public static final int CALLBACK_SUSPENDED = BASE + 9;
/** @hide */
public static final int CALLBACK_RESUMED = BASE + 10;
+ /** @hide */
+ public static final int CALLBACK_BLK_CHANGED = BASE + 11;
/** @hide */
public static String getCallbackName(int whichCallback) {
@@ -2976,6 +2989,7 @@
case EXPIRE_LEGACY_REQUEST: return "EXPIRE_LEGACY_REQUEST";
case CALLBACK_SUSPENDED: return "CALLBACK_SUSPENDED";
case CALLBACK_RESUMED: return "CALLBACK_RESUMED";
+ case CALLBACK_BLK_CHANGED: return "CALLBACK_BLK_CHANGED";
default:
return Integer.toString(whichCallback);
}
@@ -3022,7 +3036,7 @@
case CALLBACK_AVAILABLE: {
NetworkCapabilities cap = getObject(message, NetworkCapabilities.class);
LinkProperties lp = getObject(message, LinkProperties.class);
- callback.onAvailable(network, cap, lp);
+ callback.onAvailable(network, cap, lp, message.arg1 != 0);
break;
}
case CALLBACK_LOSING: {
@@ -3055,6 +3069,10 @@
callback.onNetworkResumed(network);
break;
}
+ case CALLBACK_BLK_CHANGED: {
+ boolean blocked = message.arg1 != 0;
+ callback.onBlockedStatusChanged(network, blocked);
+ }
}
}
diff --git a/core/java/android/net/NetworkCapabilities.java b/core/java/android/net/NetworkCapabilities.java
index fd1e5f2..74cd143 100644
--- a/core/java/android/net/NetworkCapabilities.java
+++ b/core/java/android/net/NetworkCapabilities.java
@@ -1589,4 +1589,14 @@
Preconditions.checkArgument(isValidCapability(capability),
"NetworkCapability " + capability + "out of range");
}
+
+ /**
+ * Check if this {@code NetworkCapability} instance is metered.
+ *
+ * @return {@code true} if {@code NET_CAPABILITY_NOT_METERED} is not set on this instance.
+ * @hide
+ */
+ public boolean isMetered() {
+ return !hasCapability(NET_CAPABILITY_NOT_METERED);
+ }
}
diff --git a/core/java/android/net/NetworkInfo.java b/core/java/android/net/NetworkInfo.java
index d912dd1..1a1d2d3 100644
--- a/core/java/android/net/NetworkInfo.java
+++ b/core/java/android/net/NetworkInfo.java
@@ -202,7 +202,9 @@
* Return a network-type-specific integer describing the subtype
* of the network.
* @return the network subtype
+ * @deprecated Use {@link android.telephony.TelephonyManager#getDataNetworkType} instead.
*/
+ @Deprecated
public int getSubtype() {
synchronized (this) {
return mSubtype;
@@ -243,7 +245,9 @@
/**
* Return a human-readable name describing the subtype of the network.
* @return the name of the network subtype
+ * @deprecated Use {@link android.telephony.TelephonyManager#getDataNetworkType} instead.
*/
+ @Deprecated
public String getSubtypeName() {
synchronized (this) {
return mSubtypeName;
@@ -278,7 +282,15 @@
* connections and pass data.
* <p>Always call this before attempting to perform data transactions.
* @return {@code true} if network connectivity exists, {@code false} otherwise.
+ * @deprecated Apps should instead use the
+ * {@link android.net.ConnectivityManager.NetworkCallback} API to
+ * learn about connectivity changes. See
+ * {@link ConnectivityManager#registerDefaultNetworkCallback} and
+ * {@link ConnectivityManager#registerNetworkCallback}. These will
+ * give a more accurate picture of the connectivity state of
+ * the device and let apps react more easily and quickly to changes.
*/
+ @Deprecated
public boolean isConnected() {
synchronized (this) {
return mState == State.CONNECTED;
@@ -411,7 +423,15 @@
/**
* Reports the current fine-grained state of the network.
* @return the fine-grained state
+ * @deprecated Apps should instead use the
+ * {@link android.net.ConnectivityManager.NetworkCallback} API to
+ * learn about connectivity changes. See
+ * {@link ConnectivityManager#registerDefaultNetworkCallback} and
+ * {@link ConnectivityManager#registerNetworkCallback}. These will
+ * give a more accurate picture of the connectivity state of
+ * the device and let apps react more easily and quickly to changes.
*/
+ @Deprecated
public DetailedState getDetailedState() {
synchronized (this) {
return mDetailedState;
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index b750d79..4ce9016 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -35,6 +35,8 @@
import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VPN;
import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;
import static android.net.NetworkCapabilities.TRANSPORT_VPN;
+import static android.net.NetworkPolicyManager.RULE_NONE;
+import static android.net.NetworkPolicyManager.uidRulesToString;
import static android.os.Process.INVALID_UID;
import static android.system.OsConstants.IPPROTO_TCP;
import static android.system.OsConstants.IPPROTO_UDP;
@@ -189,6 +191,7 @@
import java.util.Arrays;
import java.util.Collection;
import java.util.Comparator;
+import java.util.ConcurrentModificationException;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
@@ -257,6 +260,14 @@
@GuardedBy("mVpns")
private LockdownVpnTracker mLockdownTracker;
+ /**
+ * Stale copy of uid rules provided by NPMS. As long as they are accessed only in internal
+ * handler thread, they don't need a lock.
+ */
+ private SparseIntArray mUidRules = new SparseIntArray();
+ /** Flag indicating if background data is restricted. */
+ private boolean mRestrictBackground;
+
final private Context mContext;
// 0 is full bad, 100 is full good
private int mDefaultInetConditionPublished = 0;
@@ -419,6 +430,16 @@
// Handle private DNS validation status updates.
private static final int EVENT_PRIVATE_DNS_VALIDATION_UPDATE = 38;
+ /**
+ * Used to handle onUidRulesChanged event from NetworkPolicyManagerService.
+ */
+ private static final int EVENT_UID_RULES_CHANGED = 39;
+
+ /**
+ * Used to handle onRestrictBackgroundChanged event from NetworkPolicyManagerService.
+ */
+ private static final int EVENT_DATA_SAVER_CHANGED = 40;
+
private static String eventName(int what) {
return sMagicDecoderRing.get(what, Integer.toString(what));
}
@@ -780,6 +801,9 @@
mKeyStore = KeyStore.getInstance();
mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
+ // To ensure uid rules are synchronized with Network Policy, register for
+ // NetworkPolicyManagerService events must happen prior to NetworkPolicyManagerService
+ // reading existing policy from disk.
try {
mPolicyManager.registerListener(mPolicyListener);
} catch (RemoteException e) {
@@ -1116,11 +1140,6 @@
if (ignoreBlocked) {
return false;
}
- // Networks are never blocked for system services
- // TODO: consider moving this check to NetworkPolicyManagerInternal.isUidNetworkingBlocked.
- if (isSystem(uid)) {
- return false;
- }
synchronized (mVpns) {
final Vpn vpn = mVpns.get(UserHandle.getUserId(uid));
if (vpn != null && vpn.isBlockingUid(uid)) {
@@ -1150,6 +1169,17 @@
mNetworkInfoBlockingLogs.log(action + " " + uid);
}
+ private void maybeLogBlockedStatusChanged(NetworkRequestInfo nri, Network net,
+ boolean blocked) {
+ if (nri == null || net == null || !LOGD_BLOCKED_NETWORKINFO) {
+ return;
+ }
+ String action = blocked ? "BLOCKED" : "UNBLOCKED";
+ log(String.format("Blocked status changed to %s for %d(%d) on netId %d", blocked,
+ nri.mUid, nri.request.requestId, net.netId));
+ mNetworkInfoBlockingLogs.log(action + " " + nri.mUid);
+ }
+
/**
* Apply any relevant filters to {@link NetworkState} for the given UID. For
* example, this may mark the network as {@link DetailedState#BLOCKED} based
@@ -1651,10 +1681,17 @@
private final INetworkPolicyListener mPolicyListener = new NetworkPolicyManager.Listener() {
@Override
public void onUidRulesChanged(int uid, int uidRules) {
- // TODO: notify UID when it has requested targeted updates
+ mHandler.sendMessage(mHandler.obtainMessage(EVENT_UID_RULES_CHANGED, uid, uidRules));
}
@Override
public void onRestrictBackgroundChanged(boolean restrictBackground) {
+ // caller is NPMS, since we only register with them
+ if (LOGD_BLOCKED_NETWORKINFO) {
+ log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")");
+ }
+ mHandler.sendMessage(mHandler.obtainMessage(
+ EVENT_DATA_SAVER_CHANGED, restrictBackground ? 1 : 0, 0));
+
// TODO: relocate this specific callback in Tethering.
if (restrictBackground) {
log("onRestrictBackgroundChanged(true): disabling tethering");
@@ -1663,6 +1700,50 @@
}
};
+ void handleUidRulesChanged(int uid, int newRules) {
+ // skip update when we've already applied rules
+ final int oldRules = mUidRules.get(uid, RULE_NONE);
+ if (oldRules == newRules) return;
+
+ maybeNotifyNetworkBlockedForNewUidRules(uid, newRules);
+
+ if (newRules == RULE_NONE) {
+ mUidRules.delete(uid);
+ } else {
+ mUidRules.put(uid, newRules);
+ }
+ }
+
+ void handleRestrictBackgroundChanged(boolean restrictBackground) {
+ if (mRestrictBackground == restrictBackground) return;
+
+ for (final NetworkAgentInfo nai : mNetworkAgentInfos.values()) {
+ final boolean curMetered = nai.networkCapabilities.isMetered();
+ maybeNotifyNetworkBlocked(nai, curMetered, curMetered, mRestrictBackground,
+ restrictBackground);
+ }
+
+ mRestrictBackground = restrictBackground;
+ }
+
+ private boolean isUidNetworkingWithVpnBlocked(int uid, int uidRules, boolean isNetworkMetered,
+ boolean isBackgroundRestricted) {
+ synchronized (mVpns) {
+ final Vpn vpn = mVpns.get(UserHandle.getUserId(uid));
+ // Because the return value of this function depends on the list of UIDs the
+ // always-on VPN blocks when in lockdown mode, when the always-on VPN changes that
+ // list all state depending on the return value of this function has to be recomputed.
+ // TODO: add a trigger when the always-on VPN sets its blocked UIDs to reevaluate and
+ // send the necessary onBlockedStatusChanged callbacks.
+ if (vpn != null && vpn.isBlockingUid(uid)) {
+ return true;
+ }
+ }
+
+ return mPolicyManagerInternal.isUidNetworkingBlocked(uid, uidRules,
+ isNetworkMetered, isBackgroundRestricted);
+ }
+
/**
* Require that the caller is either in the same user or has appropriate permission to interact
* across users.
@@ -2118,6 +2199,28 @@
pw.decreaseIndent();
pw.println();
+ pw.print("Restrict background: ");
+ pw.println(mRestrictBackground);
+ pw.println();
+
+ pw.println("Status for known UIDs:");
+ pw.increaseIndent();
+ final int size = mUidRules.size();
+ for (int i = 0; i < size; i++) {
+ // Don't crash if the array is modified while dumping in bugreports.
+ try {
+ final int uid = mUidRules.keyAt(i);
+ final int uidRules = mUidRules.get(uid, RULE_NONE);
+ pw.println("UID=" + uid + " rules=" + uidRulesToString(uidRules));
+ } catch (ArrayIndexOutOfBoundsException e) {
+ pw.println(" ArrayIndexOutOfBoundsException");
+ } catch (ConcurrentModificationException e) {
+ pw.println(" ConcurrentModificationException");
+ }
+ }
+ pw.println();
+ pw.decreaseIndent();
+
pw.println("Network Requests:");
pw.increaseIndent();
dumpNetworkRequests(pw);
@@ -3195,6 +3298,12 @@
handlePrivateDnsValidationUpdate(
(PrivateDnsValidationUpdate) msg.obj);
break;
+ case EVENT_UID_RULES_CHANGED:
+ handleUidRulesChanged(msg.arg1, msg.arg2);
+ break;
+ case EVENT_DATA_SAVER_CHANGED:
+ handleRestrictBackgroundChanged(toBool(msg.arg1));
+ break;
}
}
}
@@ -3783,6 +3892,8 @@
private void setLockdownTracker(LockdownVpnTracker tracker) {
// Shutdown any existing tracker
final LockdownVpnTracker existing = mLockdownTracker;
+ // TODO: Add a trigger when the always-on VPN enable/disable to reevaluate and send the
+ // necessary onBlockedStatusChanged callbacks.
mLockdownTracker = null;
if (existing != null) {
existing.shutdown();
@@ -4893,12 +5004,20 @@
notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED);
}
- // Report changes that are interesting for network statistics tracking.
if (prevNc != null) {
- final boolean meteredChanged = prevNc.hasCapability(NET_CAPABILITY_NOT_METERED) !=
- newNc.hasCapability(NET_CAPABILITY_NOT_METERED);
+ final boolean oldMetered = prevNc.isMetered();
+ final boolean newMetered = newNc.isMetered();
+ final boolean meteredChanged = oldMetered != newMetered;
+
+ if (meteredChanged) {
+ maybeNotifyNetworkBlocked(nai, oldMetered, newMetered, mRestrictBackground,
+ mRestrictBackground);
+ }
+
final boolean roamingChanged = prevNc.hasCapability(NET_CAPABILITY_NOT_ROAMING) !=
newNc.hasCapability(NET_CAPABILITY_NOT_ROAMING);
+
+ // Report changes that are interesting for network statistics tracking.
if (meteredChanged || roamingChanged) {
notifyIfacesChangedForNetworkStats();
}
@@ -5028,6 +5147,8 @@
case ConnectivityManager.CALLBACK_AVAILABLE: {
putParcelable(bundle, new NetworkCapabilities(networkAgent.networkCapabilities));
putParcelable(bundle, new LinkProperties(networkAgent.linkProperties));
+ // For this notification, arg1 contains the blocked status.
+ msg.arg1 = arg1;
break;
}
case ConnectivityManager.CALLBACK_LOSING: {
@@ -5045,6 +5166,10 @@
putParcelable(bundle, new LinkProperties(networkAgent.linkProperties));
break;
}
+ case ConnectivityManager.CALLBACK_BLK_CHANGED: {
+ msg.arg1 = arg1;
+ break;
+ }
}
msg.what = notificationType;
msg.setData(bundle);
@@ -5600,7 +5725,76 @@
return;
}
- callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_AVAILABLE, 0);
+ final boolean metered = nai.networkCapabilities.isMetered();
+ final boolean blocked = isUidNetworkingWithVpnBlocked(nri.mUid, mUidRules.get(nri.mUid),
+ metered, mRestrictBackground);
+ callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_AVAILABLE, blocked ? 1 : 0);
+ }
+
+ /**
+ * Notify of the blocked state apps with a registered callback matching a given NAI.
+ *
+ * Unlike other callbacks, blocked status is different between each individual uid. So for
+ * any given nai, all requests need to be considered according to the uid who filed it.
+ *
+ * @param nai The target NetworkAgentInfo.
+ * @param oldMetered True if the previous network capabilities is metered.
+ * @param newRestrictBackground True if data saver is enabled.
+ */
+ private void maybeNotifyNetworkBlocked(NetworkAgentInfo nai, boolean oldMetered,
+ boolean newMetered, boolean oldRestrictBackground, boolean newRestrictBackground) {
+
+ for (int i = 0; i < nai.numNetworkRequests(); i++) {
+ NetworkRequest nr = nai.requestAt(i);
+ NetworkRequestInfo nri = mNetworkRequests.get(nr);
+ final int uidRules = mUidRules.get(nri.mUid);
+ final boolean oldBlocked, newBlocked;
+ // mVpns lock needs to be hold here to ensure that the active VPN cannot be changed
+ // between these two calls.
+ synchronized (mVpns) {
+ oldBlocked = isUidNetworkingWithVpnBlocked(nri.mUid, uidRules, oldMetered,
+ oldRestrictBackground);
+ newBlocked = isUidNetworkingWithVpnBlocked(nri.mUid, uidRules, newMetered,
+ newRestrictBackground);
+ }
+ if (oldBlocked != newBlocked) {
+ callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_BLK_CHANGED,
+ encodeBool(newBlocked));
+ }
+ }
+ }
+
+ /**
+ * Notify apps with a given UID of the new blocked state according to new uid rules.
+ * @param uid The uid for which the rules changed.
+ * @param newRules The new rules to apply.
+ */
+ private void maybeNotifyNetworkBlockedForNewUidRules(int uid, int newRules) {
+ for (final NetworkAgentInfo nai : mNetworkAgentInfos.values()) {
+ final boolean metered = nai.networkCapabilities.isMetered();
+ final boolean oldBlocked, newBlocked;
+ // TODO: Consider that doze mode or turn on/off battery saver would deliver lots of uid
+ // rules changed event. And this function actually loop through all connected nai and
+ // its requests. It seems that mVpns lock will be grabbed frequently in this case.
+ // Reduce the number of locking or optimize the use of lock are likely needed in future.
+ synchronized (mVpns) {
+ oldBlocked = isUidNetworkingWithVpnBlocked(
+ uid, mUidRules.get(uid), metered, mRestrictBackground);
+ newBlocked = isUidNetworkingWithVpnBlocked(
+ uid, newRules, metered, mRestrictBackground);
+ }
+ if (oldBlocked == newBlocked) {
+ return;
+ }
+ final int arg = encodeBool(newBlocked);
+ for (int i = 0; i < nai.numNetworkRequests(); i++) {
+ NetworkRequest nr = nai.requestAt(i);
+ NetworkRequestInfo nri = mNetworkRequests.get(nr);
+ if (nri != null && nri.mUid == uid) {
+ callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_BLK_CHANGED, arg);
+ }
+ }
+ }
}
private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) {