Support restricted data connection when roaming (ef5cf361) · Commits · e / os / android_frameworks_opt_telephony

src/java/com/android/internal/telephony/dataconnection/ApnContext.java

+9 −5

Original line number	Diff line number	Diff line
		@@ -460,7 +460,11 @@ public class ApnContext {
		}
		}

		public boolean hasNoRestrictedRequests(boolean excludeDun) {
		/**
		* @param excludeDun True if excluding requests that have DUN capability
		* @return True if the attached network requests contain restricted capability.
		*/
		public boolean hasRestrictedRequests(boolean excludeDun) {
		synchronized (mRefCountLock) {
		for (NetworkRequest nr : mNetworkRequests) {
		if (excludeDun &&
		@@ -468,13 +472,13 @@ public class ApnContext {
		NetworkCapabilities.NET_CAPABILITY_DUN)) {
		continue;
		}
		if (nr.networkCapabilities.hasCapability(
		NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED) == false) {
		return false;
		if (!nr.networkCapabilities.hasCapability(
		NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)) {
		return true;
		}
		}
		}
		return true;
		return false;
		}

		private final SparseIntArray mRetriesLeftPerErrorCode = new SparseIntArray();

src/java/com/android/internal/telephony/dataconnection/ApnSettingUtils.java

+4 −2

Original line number	Diff line number	Diff line
		@@ -22,6 +22,7 @@ import android.telephony.CarrierConfigManager;
		import android.telephony.Rlog;
		import android.telephony.ServiceState;
		import android.telephony.data.ApnSetting;
		import android.text.TextUtils;
		import android.util.Log;

		import com.android.internal.telephony.Phone;
		@@ -118,7 +119,7 @@ public class ApnSettingUtils {
		* @return {@code true} if the APN type is metered, {@code false} otherwise.
		*/
		public static boolean isMeteredApnType(String type, Phone phone) {
		if (phone == null) {
		if (phone == null \|\| TextUtils.isEmpty(type)) {
		return true;
		}

		@@ -193,11 +194,12 @@ public class ApnSettingUtils {
		/**
		* Check if this APN setting is metered.
		*
		* @param apn APN setting
		* @param phone The phone object
		* @return True if this APN setting is metered, otherwise false.
		*/
		public static boolean isMetered(ApnSetting apn, Phone phone) {
		if (phone == null) {
		if (phone == null \|\| apn == null) {
		return true;
		}

src/java/com/android/internal/telephony/dataconnection/DataConnection.java

+136 −51

Original line number	Diff line number	Diff line
		@@ -123,17 +123,14 @@ public class DataConnection extends StateMachine {
		ApnContext mApnContext;
		int mProfileId;
		int mRilRat;
		final boolean mUnmeteredUseOnly;
		Message mOnCompletedMsg;
		final int mConnectionGeneration;

		ConnectionParams(ApnContext apnContext, int profileId, int rilRadioTechnology,
		boolean unmeteredUseOnly, Message onCompletedMsg,
		int connectionGeneration) {
		Message onCompletedMsg, int connectionGeneration) {
		mApnContext = apnContext;
		mProfileId = profileId;
		mRilRat = rilRadioTechnology;
		mUnmeteredUseOnly = unmeteredUseOnly;
		mOnCompletedMsg = onCompletedMsg;
		mConnectionGeneration = connectionGeneration;
		}
		@@ -143,7 +140,6 @@ public class DataConnection extends StateMachine {
		return "{mTag=" + mTag + " mApnContext=" + mApnContext
		+ " mProfileId=" + mProfileId
		+ " mRat=" + mRilRat
		+ " mUnmeteredUseOnly=" + mUnmeteredUseOnly
		+ " mOnCompletedMsg=" + msgToString(mOnCompletedMsg) + "}";
		}
		}
		@@ -222,8 +218,9 @@ public class DataConnection extends StateMachine {
		static final int EVENT_KEEPALIVE_STOP_REQUEST = BASE + 22;
		static final int EVENT_LINK_CAPACITY_CHANGED = BASE + 23;
		static final int EVENT_RESET = BASE + 24;
		static final int EVENT_REEVALUATE_RESTRICTED_STATE = BASE + 25;

		private static final int CMD_TO_STRING_COUNT = EVENT_RESET - BASE + 1;
		private static final int CMD_TO_STRING_COUNT = EVENT_REEVALUATE_RESTRICTED_STATE - BASE + 1;

		private static String[] sCmdToString = new String[CMD_TO_STRING_COUNT];
		static {
		@@ -255,6 +252,8 @@ public class DataConnection extends StateMachine {
		sCmdToString[EVENT_KEEPALIVE_STOP_REQUEST - BASE] = "EVENT_KEEPALIVE_STOP_REQUEST";
		sCmdToString[EVENT_LINK_CAPACITY_CHANGED - BASE] = "EVENT_LINK_CAPACITY_CHANGED";
		sCmdToString[EVENT_RESET - BASE] = "EVENT_RESET";
		sCmdToString[EVENT_REEVALUATE_RESTRICTED_STATE - BASE] =
		"EVENT_REEVALUATE_RESTRICTED_STATE";
		}
		// Convert cmd to string or null if unknown
		static String cmdToString(int cmd) {
		@@ -735,6 +734,8 @@ public class DataConnection extends StateMachine {
		mLinkProperties = new LinkProperties();
		mApnContexts.clear();
		mApnSetting = null;
		mUnmeteredUseOnly = false;
		mRestrictedNetworkOverride = false;
		mDcFailCause = null;
		}

		@@ -885,14 +886,19 @@ public class DataConnection extends StateMachine {
		mLinkProperties.setTcpBufferSizes(sizes);
		}

		/**
		* Indicates if this data connection was established for unmetered use only. Note that this
		* flag should be populated when data becomes active. And if it is set to true, it can be set to
		* false later when we are reevaluating the data connection. But if it is set to false, it
		* can never become true later because setting it to true will cause this data connection
		* losing some immutable network capabilities, which can cause issues in connectivity service.
		*/
		private boolean mUnmeteredUseOnly = false;

		/**
		* Indicates if when this connection was established we had a restricted/privileged
		* NetworkRequest and needed it to overcome data-enabled limitations.
		*
		* This gets set once per connection setup and is based on conditions at that time.
		* We could theoretically have dynamic capabilities but now is not a good time to
		* experiment with that.
		*
		* This flag overrides the APN-based restriction capability, restricting the network
		* based on both having a NetworkRequest with restricted AND needing a restricted
		* bit to overcome user-disabled status. This allows us to handle the common case
		@@ -900,38 +906,78 @@ public class DataConnection extends StateMachine {
		* if conditions require a restricted network to overcome user-disabled then it must
		* be restricted, otherwise it is unrestricted (or restricted based on APN type).
		*
		* Because we're not supporting dynamic capabilities, if conditions change and we go from
		* data-enabled to not or vice-versa we will need to tear down networks to deal with it
		* at connection setup time with the new state.
		*
		* This supports a privileged app bringing up a network without general apps having access
		* to it when the network is otherwise unavailable (hipri). The first use case is
		* pre-paid SIM reprovisioning over internet, where the carrier insists on no traffic
		* other than from the privileged carrier-app.
		*
		* Note that the data connection cannot go from unrestricted to restricted because the
		* connectivity service does not support dynamically closing TCP connections at this point.
		*/
		private boolean mRestrictedNetworkOverride = false;

		// Should be called once when the call goes active to examine the state of things and
		// declare the restriction override for the life of the connection
		private void setNetworkRestriction() {
		mRestrictedNetworkOverride = false;
		// first, if we have no restricted requests, this override can stay FALSE:
		boolean noRestrictedRequests = true;
		/**
		* Check if this data connection should be restricted. We should call this when data connection
		* becomes active, or when we want to re-evaluate the conditions to decide if we need to
		* unstrict the data connection.
		*
		* @return True if this data connection needs to be restricted.
		*/

		private boolean shouldRestrictNetwork() {
		// first, check if there is any network request that containing restricted capability
		// (i.e. Do not have NET_CAPABILITY_NOT_RESTRICTED in the request)
		boolean isAnyRestrictedRequest = false;
		for (ApnContext apnContext : mApnContexts.keySet()) {
		noRestrictedRequests &= apnContext.hasNoRestrictedRequests(true /* exclude DUN */);
		if (apnContext.hasRestrictedRequests(true /* exclude DUN */)) {
		isAnyRestrictedRequest = true;
		break;
		}
		if (noRestrictedRequests) {
		return;
		}

		// Do we need a restricted network to satisfy the request?
		// Is this network metered? If not, then don't add restricted
		// If all of the network requests are non-restricted, then we don't need to restrict
		// the network.
		if (!isAnyRestrictedRequest) {
		return false;
		}

		// If the network is unmetered, then we don't need to restrict the network because users
		// won't be charged anyway.
		if (!ApnSettingUtils.isMetered(mApnSetting, mPhone)) {
		return;
		return false;
		}

		// If the data is disabled, then we need to restrict the network so only privileged apps can
		// use the restricted network while data is disabled.
		if (!mDct.isDataEnabled()) {
		return true;
		}

		// Is data disabled?
		mRestrictedNetworkOverride = !mDct.isDataEnabled();
		// If the device is roaming, and the user does not turn on data roaming, then we need to
		// restrict the network so only privileged apps can use it.
		if (!mDct.getDataRoamingEnabled() && mPhone.getServiceState().getDataRoaming()) {
		return true;
		}

		// Otherwise we should not restrict the network so anyone who requests can use it.
		return false;
		}

		/**
		* @return True if this data connection should only be used for unmetered purposes.
		*/
		private boolean isUnmeteredUseOnly() {
		// The data connection can only be unmetered used only if all requests' reasons are
		// unmetered.
		for (ApnContext apnContext : mApnContexts.keySet()) {
		DataConnectionReasons dataConnectionReasons = new DataConnectionReasons();
		boolean isDataAllowed = mDct.isDataAllowed(apnContext, dataConnectionReasons);
		if (!isDataAllowed \|\| !dataConnectionReasons.contains(
		DataConnectionReasons.DataAllowedReasonType.UNMETERED_APN)) {
		return false;
		}
		}
		return true;
		}

		NetworkCapabilities getNetworkCapabilities() {
		@@ -942,8 +988,7 @@ public class DataConnection extends StateMachine {
		final String[] types = ApnSetting.getApnTypesStringFromBitmask(
		mApnSetting.getApnTypeBitmask()).split(",");
		for (String type : types) {
		if (!mRestrictedNetworkOverride
		&& (mConnectionParams != null && mConnectionParams.mUnmeteredUseOnly)
		if (!mRestrictedNetworkOverride && mUnmeteredUseOnly
		&& ApnSettingUtils.isMeteredApnType(type, mPhone)) {
		log("Dropped the metered " + type + " for the unmetered data call.");
		continue;
		@@ -1003,8 +1048,7 @@ public class DataConnection extends StateMachine {
		// Mark NOT_METERED in the following cases,
		// 1. All APNs in APN settings are unmetered.
		// 2. The non-restricted data and is intended for unmetered use only.
		if (((mConnectionParams != null && mConnectionParams.mUnmeteredUseOnly)
		&& !mRestrictedNetworkOverride)
		if ((mUnmeteredUseOnly && !mRestrictedNetworkOverride)
		\|\| !ApnSettingUtils.isMetered(mApnSetting, mPhone)) {
		result.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED);
		} else {
		@@ -1013,6 +1057,7 @@ public class DataConnection extends StateMachine {

		result.maybeMarkCapabilitiesRestricted();
		}

		if (mRestrictedNetworkOverride) {
		result.removeCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED);
		// don't use dun on restriction-overriden networks.
		@@ -1270,17 +1315,11 @@ public class DataConnection extends StateMachine {
		break;

		case EVENT_DISCONNECT:
		if (DBG) {
		log("DcDefaultState deferring msg.what=EVENT_DISCONNECT RefCount="
		+ mApnContexts.size());
		}
		deferMessage(msg);
		break;

		case EVENT_DISCONNECT_ALL:
		case EVENT_REEVALUATE_RESTRICTED_STATE:
		if (DBG) {
		log("DcDefaultState deferring msg.what=EVENT_DISCONNECT_ALL RefCount="
		+ mApnContexts.size());
		log("DcDefaultState deferring msg.what=" + getWhatToString(msg.what)
		+ " RefCount=" + mApnContexts.size());
		}
		deferMessage(msg);
		break;
		@@ -1457,8 +1496,10 @@ public class DataConnection extends StateMachine {

		switch (msg.what) {
		case EVENT_RESET:
		case EVENT_REEVALUATE_RESTRICTED_STATE:
		if (DBG) {
		log("DcInactiveState: msg.what=EVENT_RESET, ignore we're already reset");
		log("DcInactiveState: msg.what=" + getWhatToString(msg.what)
		+ ", ignore we're already done");
		}
		retVal = HANDLED;
		break;
		@@ -1659,8 +1700,13 @@ public class DataConnection extends StateMachine {
		}
		misc.subscriberId = mPhone.getSubscriberId();

		setNetworkRestriction();
		if (DBG) log("mRestrictedNetworkOverride = " + mRestrictedNetworkOverride);
		mRestrictedNetworkOverride = shouldRestrictNetwork();
		mUnmeteredUseOnly = isUnmeteredUseOnly();

		if (DBG) {
		log("mRestrictedNetworkOverride = " + mRestrictedNetworkOverride
		+ ", mUnmeteredUseOnly = " + mUnmeteredUseOnly);
		}
		mNetworkAgent = new DcNetworkAgent(getHandler().getLooper(), mPhone.getContext(),
		"DcNetworkAgent", mNetworkInfo, getNetworkCapabilities(), mLinkProperties,
		50, misc);
		@@ -1924,6 +1970,37 @@ public class DataConnection extends StateMachine {
		retVal = HANDLED;
		break;
		}
		case EVENT_REEVALUATE_RESTRICTED_STATE: {
		// If the network was restricted, and now it does not need to be restricted
		// anymore, we should add the NET_CAPABILITY_NOT_RESTRICTED capability.
		if (mRestrictedNetworkOverride && !shouldRestrictNetwork()) {
		if (DBG) {
		log("Data connection becomes not-restricted. dc=" + this);
		}
		// Note we only do this when network becomes non-restricted. When a
		// non-restricted becomes restricted (e.g. users disable data, or turn off
		// data roaming), DCT will explicitly tear down the networks (because
		// connectivity service does not support force-close TCP connections today).
		// Also note that NET_CAPABILITY_NOT_RESTRICTED is an immutable capability
		// (see {@link NetworkCapabilities}) once we add it to the network, we can't
		// remove it through the entire life cycle of the connection.
		mRestrictedNetworkOverride = false;
		mNetworkAgent.sendNetworkCapabilities(getNetworkCapabilities());
		}

		// If the data does need to be unmetered use only (e.g. users turn on data, or
		// device is not roaming anymore assuming data roaming is off), then we can
		// dynamically add those metered APN type capabilities back. (But not the
		// other way around because most of the APN-type capabilities are immutable
		// capabilities.)
		if (mUnmeteredUseOnly && !isUnmeteredUseOnly()) {
		mUnmeteredUseOnly = false;
		mNetworkAgent.sendNetworkCapabilities(getNetworkCapabilities());
		}

		retVal = HANDLED;
		break;
		}
		default:
		if (VDBG) {
		log("DcActiveState not handled msg.what=" + getWhatToString(msg.what));
		@@ -2259,7 +2336,6 @@ public class DataConnection extends StateMachine {
		* @param apnContext is the Access Point Name to bring up a connection to
		* @param profileId for the connection
		* @param rilRadioTechnology Radio technology for the data connection
		* @param unmeteredUseOnly Indicates the data connection can only used for unmetered purposes
		* @param onCompletedMsg is sent with its msg.obj as an AsyncResult object.
		* With AsyncResult.userObj set to the original msg.obj,
		* AsyncResult.result = FailCause and AsyncResult.exception = Exception().
		@@ -2267,15 +2343,13 @@ public class DataConnection extends StateMachine {
		* ignored if obsolete.
		*/
		public void bringUp(ApnContext apnContext, int profileId, int rilRadioTechnology,
		boolean unmeteredUseOnly, Message onCompletedMsg,
		int connectionGeneration) {
		Message onCompletedMsg, int connectionGeneration) {
		if (DBG) {
		log("bringUp: apnContext=" + apnContext + "unmeteredUseOnly=" + unmeteredUseOnly
		+ " onCompletedMsg=" + onCompletedMsg);
		log("bringUp: apnContext=" + apnContext + " onCompletedMsg=" + onCompletedMsg);
		}
		sendMessage(DataConnection.EVENT_CONNECT,
		new ConnectionParams(apnContext, profileId, rilRadioTechnology, unmeteredUseOnly,
		onCompletedMsg, connectionGeneration));
		new ConnectionParams(apnContext, profileId, rilRadioTechnology, onCompletedMsg,
		connectionGeneration));
		}

		/**
		@@ -2324,6 +2398,15 @@ public class DataConnection extends StateMachine {
		if (DBG) log("reset");
		}

		/**
		* Re-evaluate the restricted state. If the restricted data connection does not need to be
		* restricted anymore, we need to dynamically change the network's capability.
		*/
		void reevaluateRestrictedState() {
		sendMessage(EVENT_REEVALUATE_RESTRICTED_STATE);
		if (DBG) log("reevaluate restricted state");
		}

		/**
		* @return The parameters used for initiating a data connection.
		*/
		@@ -2557,6 +2640,8 @@ public class DataConnection extends StateMachine {
		pw.println("mLastFailCause=" + mLastFailCause);
		pw.println("mUserData=" + mUserData);
		pw.println("mSubscriptionOverride=" + Integer.toHexString(mSubscriptionOverride));
		pw.println("mRestrictedNetworkOverride=" + mRestrictedNetworkOverride);
		pw.println("mUnmeteredUseOnly=" + mUnmeteredUseOnly);
		pw.println("mInstanceNumber=" + mInstanceNumber);
		pw.println("mAc=" + mAc);
		pw.println("Network capabilities changed history:");

src/java/com/android/internal/telephony/dataconnection/DcTracker.java

+22 −46

Original line number	Diff line number	Diff line
		@@ -818,47 +818,16 @@ public class DcTracker extends Handler {
		*
		* For example, handle reverting restricted networks back to unrestricted. If we're changing
		* user data to enabled and this makes data truly enabled (not disabled by other factors) we
		* need to tear down any metered apn type that was enabled anyway by a privileged request.
		* This allows us to reconnect to it in an unrestricted way.
		* need to reevaluate and possibly add NET_CAPABILITY_NOT_RESTRICTED capability to the data
		* connection. This allows non-privilege apps to use the network.
		*
		* Or when we brought up a unmetered data connection while data is off, we only limit this
		* data connection for unmetered use only. When data is turned back on, we need to tear that
		* down so a full capable data connection can be re-established.
		*/
		private void reevaluateDataConnections() {
		if (mDataEnabledSettings.isDataEnabled()) {
		for (ApnContext apnContext : mApnContexts.values()) {
		if (apnContext.isConnectedOrConnecting()) {
		final DataConnection dataConnection = apnContext.getDataConnection();
		if (dataConnection != null) {
		final NetworkCapabilities netCaps = dataConnection.getNetworkCapabilities();
		if (netCaps != null && !netCaps.hasCapability(NetworkCapabilities
		.NET_CAPABILITY_NOT_RESTRICTED) && !netCaps.hasCapability(
		NetworkCapabilities.NET_CAPABILITY_NOT_METERED)) {
		if (DBG) {
		log("Tearing down restricted metered net:" + apnContext);
		}
		// Tearing down the restricted metered data call when
		// conditions change. This will allow reestablishing a new unrestricted
		// data connection.
		apnContext.setReason(Phone.REASON_DATA_ENABLED);
		cleanUpConnection(true, apnContext);
		} else if (ApnSettingUtils.isMetered(apnContext.getApnSetting(), mPhone)
		&& (netCaps != null && netCaps.hasCapability(
		NetworkCapabilities.NET_CAPABILITY_NOT_METERED))) {
		if (DBG) {
		log("Tearing down unmetered net:" + apnContext);
		}
		// The APN settings is metered, but the data was still marked as
		// unmetered data, must be the unmetered data connection brought up when
		// data is off. We need to tear that down when data is enabled again.
		// This will allow reestablishing a new full capability data connection.
		apnContext.setReason(Phone.REASON_DATA_ENABLED);
		cleanUpConnection(true, apnContext);
		}
		}
		}
		}
		for (DataConnection dataConnection : mDataConnections.values()) {
		dataConnection.reevaluateRestrictedState();
		}
		}

		@@ -1244,7 +1213,8 @@ public class DcTracker extends Handler {
		* provided.
		* @return True if data connection is allowed, otherwise false.
		*/
		boolean isDataAllowed(ApnContext apnContext, DataConnectionReasons dataConnectionReasons) {
		public boolean isDataAllowed(ApnContext apnContext,
		DataConnectionReasons dataConnectionReasons) {
		// Step 1: Get all environment conditions.
		// Step 2: Special handling for emergency APN.
		// Step 3. Build disallowed reasons.
		@@ -1367,11 +1337,11 @@ public class DcTracker extends Handler {
		reasons.add(DataAllowedReasonType.UNMETERED_APN);
		}

		// If the request is restricted and there are only disallowed reasons due to data
		// disabled, we should allow the data.
		// If the request is restricted and there are only soft disallowed reasons (e.g. data
		// disabled, data roaming disabled) existing, we should allow the data.
		if (apnContext != null
		&& !apnContext.hasNoRestrictedRequests(true)
		&& reasons.contains(DataDisallowedReasonType.DATA_DISABLED)) {
		&& apnContext.hasRestrictedRequests(true)
		&& !reasons.allowed()) {
		reasons.add(DataAllowedReasonType.RESTRICTED_REQUEST);
		}

		@@ -1491,8 +1461,7 @@ public class DcTracker extends Handler {
		}
		}

		boolean retValue = setupData(apnContext, radioTech, dataConnectionReasons.contains(
		DataAllowedReasonType.UNMETERED_APN));
		boolean retValue = setupData(apnContext, radioTech);
		notifyOffApnsOfAvailability(apnContext.getReason());

		if (DBG) log("trySetupData: X retValue=" + retValue);
		@@ -1901,11 +1870,9 @@ public class DcTracker extends Handler {
		*
		* @param apnContext APN context
		* @param radioTech RAT of the data connection
		* @param unmeteredUseOnly True if this data connection should be only used for unmetered
		* purposes only.
		* @return True if successful, otherwise false.
		*/
		private boolean setupData(ApnContext apnContext, int radioTech, boolean unmeteredUseOnly) {
		private boolean setupData(ApnContext apnContext, int radioTech) {
		if (DBG) log("setupData: apnContext=" + apnContext);
		apnContext.requestLog("setupData");
		ApnSetting apnSetting;
		@@ -1995,7 +1962,7 @@ public class DcTracker extends Handler {
		Message msg = obtainMessage();
		msg.what = DctConstants.EVENT_DATA_SETUP_COMPLETE;
		msg.obj = new Pair<ApnContext, Integer>(apnContext, generation);
		dataConnection.bringUp(apnContext, profileId, radioTech, unmeteredUseOnly, msg, generation);
		dataConnection.bringUp(apnContext, profileId, radioTech, msg, generation);

		if (DBG) log("setupData: initing!");
		return true;
		@@ -2648,6 +2615,8 @@ public class DcTracker extends Handler {
		private void onDataRoamingOff() {
		if (DBG) log("onDataRoamingOff");

		reevaluateDataConnections();

		if (!getDataRoamingEnabled()) {
		// TODO: Remove this once all old vendor RILs are gone. We don't need to set initial apn
		// attach and send the data profile again as the modem should have both roaming and
		@@ -2683,6 +2652,13 @@ public class DcTracker extends Handler {
		checkDataRoamingStatus(settingChanged);

		if (getDataRoamingEnabled()) {
		// If the restricted data was brought up when data roaming is disabled, and now users
		// enable data roaming, we need to re-evaluate the conditions and possibly change the
		// network's capability.
		if (settingChanged) {
		reevaluateDataConnections();
		}

		if (DBG) log("onDataRoamingOnOrSettingsChanged: setup data on roaming");

		setupDataOnConnectableApns(Phone.REASON_ROAMING_ON);

tests/telephonytests/src/com/android/internal/telephony/dataconnection/DcTrackerTest.java

+4 −5

File changed.

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