Switch DDS for MSIM emergency call (4448c616) · Commits · e / os / android_frameworks_opt_telephony

src/java/com/android/internal/telephony/PhoneSwitcher.java

+224 −6

Original line number	Diff line number	Diff line
		@@ -71,6 +71,7 @@ import java.util.ArrayList;
		import java.util.Calendar;
		import java.util.Collections;
		import java.util.List;
		import java.util.concurrent.CompletableFuture;

		/**
		* Utility singleton to monitor subscription changes and incoming NetworkRequests
		@@ -85,11 +86,72 @@ public class PhoneSwitcher extends Handler {

		private static final int DEFAULT_NETWORK_CHANGE_TIMEOUT_MS = 5000;
		private static final int MODEM_COMMAND_RETRY_PERIOD_MS = 5000;
		// After the emergency call ends, wait for a few seconds to see if we enter ECBM before starting
		// the countdown to remove the emergency DDS override.
		@VisibleForTesting
		// not final for testing.
		public static int ECBM_DEFAULT_DATA_SWITCH_BASE_TIME_MS = 5000;
		// Wait for a few seconds after the override request comes in to receive the outgoing call
		// event. If it does not happen before the timeout specified, cancel the override.
		@VisibleForTesting
		public static int DEFAULT_DATA_OVERRIDE_TIMEOUT_MS = 5000;

		// If there are no subscriptions in a device, then the phone to be used for emergency should
		// always be the "first" phone.
		private static final int DEFAULT_EMERGENCY_PHONE_ID = 0;

		/**
		* Container for an ongoing request to override the DDS in the context of an ongoing emergency
		* call to allow for carrier specific operations, such as provide SUPL updates during or after
		* the emergency call, since some modems do not support these operations on the non DDS.
		*/
		private static final class EmergencyOverrideRequest {
		/* The Phone ID that the DDS should be set to. */
		int mPhoneId = INVALID_PHONE_INDEX;
		/* The time after the emergency call ends that the DDS should be overridden for. */
		int mGnssOverrideTimeMs = -1;
		/* A callback to the requester notifying them if the initial call to the modem to override
		* the DDS was successful.
		*/
		CompletableFuture<Boolean> mOverrideCompleteFuture;
		/* In the special case that the device goes into emergency callback mode after the emergency
		* call ends, keep the override until ECM finishes and then start the mGnssOverrideTimeMs
		* timer to leave DDS override.
		*/
		boolean mRequiresEcmFinish = false;

		/*
		* Keeps track of whether or not this request has already serviced the outgoing emergency
		* call. Once finished, do not delay for any other calls.
		*/
		boolean mPendingOriginatingCall = true;

		/**
		* @return true if there is a pending override complete callback.
		*/
		boolean isCallbackAvailable() {
		return mOverrideCompleteFuture != null;
		}

		/**
		* Send the override complete callback the result of setting the DDS to the new value.
		*/
		void sendOverrideCompleteCallbackResultAndClear(boolean result) {
		if (isCallbackAvailable()) {
		mOverrideCompleteFuture.complete(result);
		mOverrideCompleteFuture = null;
		}
		}


		@Override
		public String toString() {
		return String.format("EmergencyOverrideRequest: [phoneId= %d, overrideMs= %d,"
		+ " hasCallback= %b, ecmFinishStatus= %b]", mPhoneId, mGnssOverrideTimeMs,
		isCallbackAvailable(), mRequiresEcmFinish);
		}
		}

		private final List<DcRequest> mPrioritizedDcRequests = new ArrayList<DcRequest>();
		private final RegistrantList mActivePhoneRegistrants;
		private final SubscriptionController mSubscriptionController;
		@@ -138,22 +200,42 @@ public class PhoneSwitcher extends Handler {
		// Subscription ID corresponds to mPreferredDataPhoneId.
		private int mPreferredDataSubId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;

		// If non-null, An emergency call is about to be started, is ongoing, or has just ended and we
		// are overriding the DDS.
		// Internal state, should ONLY be accessed/modified inside of the handler.
		private EmergencyOverrideRequest mEmergencyOverride;

		private ISetOpportunisticDataCallback mSetOpptSubCallback;

		private static final int EVENT_PRIMARY_DATA_SUB_CHANGED = 101;
		private static final int EVENT_SUBSCRIPTION_CHANGED = 102;
		private static final int EVENT_REQUEST_NETWORK = 103;
		private static final int EVENT_RELEASE_NETWORK = 104;
		// ECBM has started/ended. If we just ended an emergency call and mEmergencyOverride is not
		// null, we will wait for EVENT_EMERGENCY_TOGGLE again with ECBM ending to send the message
		// EVENT_REMOVE_DDS_EMERGENCY_OVERRIDE to remove the override after the mEmergencyOverride
		// override timer ends.
		private static final int EVENT_EMERGENCY_TOGGLE = 105;
		private static final int EVENT_RADIO_CAPABILITY_CHANGED = 106;
		private static final int EVENT_OPPT_DATA_SUB_CHANGED = 107;
		private static final int EVENT_RADIO_AVAILABLE = 108;
		// A call has either started or ended. If an emergency ended and DDS is overridden using
		// mEmergencyOverride, start the countdown to remove the override using the message
		// EVENT_REMOVE_DDS_EMERGENCY_OVERRIDE. The only exception to this is if the device moves to
		// ECBM, which is detected by EVENT_EMERGENCY_TOGGLE.
		private static final int EVENT_PHONE_IN_CALL_CHANGED = 109;
		private static final int EVENT_NETWORK_VALIDATION_DONE = 110;
		private static final int EVENT_REMOVE_DEFAULT_NETWORK_CHANGE_CALLBACK = 111;
		private static final int EVENT_MODEM_COMMAND_DONE = 112;
		private static final int EVENT_MODEM_COMMAND_RETRY = 113;
		private static final int EVENT_DATA_ENABLED_CHANGED = 114;
		// An emergency call is about to be originated and requires the DDS to be overridden.
		// Uses EVENT_PHONE_IN_CALL_CHANGED message to start countdown to finish override defined in
		// mEmergencyOverride. If EVENT_PHONE_IN_CALL_CHANGED does not come in
		// DEFAULT_DATA_OVERRIDE_TIMEOUT_MS milliseconds, then the override will be removed.
		private static final int EVENT_OVERRIDE_DDS_FOR_EMERGENCY = 115;
		// If it exists, remove the current mEmergencyOverride DDS override.
		private static final int EVENT_REMOVE_DDS_EMERGENCY_OVERRIDE = 116;

		// Depending on version of IRadioConfig, we need to send either RIL_REQUEST_ALLOW_DATA if it's
		// 1.0, or RIL_REQUEST_SET_PREFERRED_DATA if it's 1.1 or later. So internally mHalCommandToUse
		@@ -394,6 +476,19 @@ public class PhoneSwitcher extends Handler {
		break;
		}
		case EVENT_EMERGENCY_TOGGLE: {
		boolean isInEcm = isInEmergencyCallbackMode();
		if (mEmergencyOverride != null) {
		log("Emergency override - ecbm status = " + isInEcm);
		if (isInEcm) {
		// The device has gone into ECBM. Wait until it's out.
		removeMessages(EVENT_REMOVE_DDS_EMERGENCY_OVERRIDE);
		mEmergencyOverride.mRequiresEcmFinish = true;
		} else if (mEmergencyOverride.mRequiresEcmFinish) {
		// we have exited ECM! Start the timer to exit DDS override.
		Message msg2 = obtainMessage(EVENT_REMOVE_DDS_EMERGENCY_OVERRIDE);
		sendMessageDelayed(msg2, mEmergencyOverride.mGnssOverrideTimeMs);
		}
		}
		onEvaluate(REQUESTS_CHANGED, "emergencyToggle");
		break;
		}
		@@ -415,9 +510,25 @@ public class PhoneSwitcher extends Handler {
		onEvaluate(REQUESTS_UNCHANGED, "EVENT_RADIO_AVAILABLE");
		break;
		}
		case EVENT_PHONE_IN_CALL_CHANGED: {
		// Only handle this event if we are currently waiting for the emergency call
		// associated with the override request to start or end.
		if (mEmergencyOverride != null && mEmergencyOverride.mPendingOriginatingCall) {
		removeMessages(EVENT_REMOVE_DDS_EMERGENCY_OVERRIDE);
		if (mPhoneIdInVoiceCall == SubscriptionManager.INVALID_PHONE_INDEX) {
		// not in a call anymore.
		Message msg2 = obtainMessage(EVENT_REMOVE_DDS_EMERGENCY_OVERRIDE);
		sendMessageDelayed(msg2, mEmergencyOverride.mGnssOverrideTimeMs
		+ ECBM_DEFAULT_DATA_SWITCH_BASE_TIME_MS);
		// Do not extend the emergency override by waiting for other calls to end.
		// If it needs to be extended, a new request will come in and replace the
		// current override.
		mEmergencyOverride.mPendingOriginatingCall = false;
		}
		}
		}
		// fall through
		case EVENT_DATA_ENABLED_CHANGED:
		case EVENT_PHONE_IN_CALL_CHANGED:
		if (onEvaluate(REQUESTS_UNCHANGED, "EVENT_PHONE_IN_CALL_CHANGED")) {
		logDataSwitchEvent(mOpptDataSubId,
		TelephonyEvent.EventState.EVENT_STATE_START,
		@@ -437,7 +548,13 @@ public class PhoneSwitcher extends Handler {
		}
		case EVENT_MODEM_COMMAND_DONE: {
		AsyncResult ar = (AsyncResult) msg.obj;
		if (ar != null && ar.exception != null) {
		boolean commandSuccess = ar != null && ar.exception == null;
		if (mEmergencyOverride != null) {
		log("Emergency override result sent = " + commandSuccess);
		mEmergencyOverride.sendOverrideCompleteCallbackResultAndClear(commandSuccess);
		// Do not retry , as we do not allow changes in onEvaluate during an emergency
		// call. When the call ends, we will start the countdown to remove the override.
		} else if (!commandSuccess) {
		int phoneId = (int) ar.userObj;
		log("Modem command failed. with exception " + ar.exception);
		sendMessageDelayed(Message.obtain(this, EVENT_MODEM_COMMAND_RETRY,
		@@ -449,16 +566,80 @@ public class PhoneSwitcher extends Handler {
		int phoneId = (int) msg.obj;
		log("Resend modem command on phone " + phoneId);
		sendRilCommands(phoneId);
		break;
		}
		case EVENT_OVERRIDE_DDS_FOR_EMERGENCY: {
		EmergencyOverrideRequest req = (EmergencyOverrideRequest) msg.obj;
		if (mEmergencyOverride != null) {
		// If an override request comes in for a different phone ID than what is already
		// being overridden, ignore. We should not try to switch DDS while already
		// waiting for SUPL.
		if (mEmergencyOverride.mPhoneId != req.mPhoneId) {
		log("emergency override requested for phone id " + req.mPhoneId + " when "
		+ "there is already an override in place for phone id "
		+ mEmergencyOverride.mPhoneId + ". Ignoring.");
		if (req.isCallbackAvailable()) {
		// Send failed result
		req.mOverrideCompleteFuture.complete(false);
		}
		break;
		} else {
		if (mEmergencyOverride.isCallbackAvailable()) {
		// Unblock any waiting overrides if a new request comes in before the
		// previous one is processed.
		mEmergencyOverride.mOverrideCompleteFuture.complete(false);
		}
		}
		mEmergencyOverride = req;
		} else {
		mEmergencyOverride = req;
		}

		log("new emergency override - " + mEmergencyOverride);
		// a new request has been created, remove any previous override complete scheduled.
		removeMessages(EVENT_REMOVE_DDS_EMERGENCY_OVERRIDE);
		Message msg2 = obtainMessage(EVENT_REMOVE_DDS_EMERGENCY_OVERRIDE);
		// Make sure that if we never get an incall indication that we remove the override.
		sendMessageDelayed(msg2, DEFAULT_DATA_OVERRIDE_TIMEOUT_MS);
		// Wait for call to end and EVENT_PHONE_IN_CALL_CHANGED to be called, then start
		// timer to remove DDS emergency override.
		if (!onEvaluate(REQUESTS_UNCHANGED, "emer_override_dds")) {
		// Nothing changed as a result of override, so no modem command was sent. Treat
		// as success.
		mEmergencyOverride.sendOverrideCompleteCallbackResultAndClear(true);
		// Do not clear mEmergencyOverride here, as we still want to keep the override
		// active for the time specified in case the user tries to switch default data.
		}
		break;
		}
		case EVENT_REMOVE_DDS_EMERGENCY_OVERRIDE: {
		log("Emergency override removed - " + mEmergencyOverride);
		mEmergencyOverride = null;
		onEvaluate(REQUESTS_UNCHANGED, "emer_rm_override_dds");
		break;
		}
		}
		}

		private boolean isEmergency() {
		if (isInEmergencyCallbackMode()) return true;
		for (Phone p : mPhones) {
		if (p == null) continue;
		if (p.isInEcm() \|\| p.isInEmergencyCall()) return true;
		if (p.isInEmergencyCall()) return true;
		Phone imsPhone = p.getImsPhone();
		if (imsPhone != null && (imsPhone.isInEcm() \|\| imsPhone.isInEmergencyCall())) {
		if (imsPhone != null && imsPhone.isInEmergencyCall()) {
		return true;
		}
		}
		return false;
		}

		private boolean isInEmergencyCallbackMode() {
		for (Phone p : mPhones) {
		if (p == null) continue;
		if (p.isInEcm()) return true;
		Phone imsPhone = p.getImsPhone();
		if (imsPhone != null && imsPhone.isInEcm()) {
		return true;
		}
		}
		@@ -569,7 +750,7 @@ public class PhoneSwitcher extends Handler {
		private boolean onEvaluate(boolean requestsChanged, String reason) {
		StringBuilder sb = new StringBuilder(reason);
		if (isEmergency()) {
		log("onEvalute aborted due to Emergency");
		log("onEvaluate for reason " + reason + " aborted due to Emergency");
		return false;
		}

		@@ -726,6 +907,35 @@ public class PhoneSwitcher extends Handler {
		msg.sendToTarget();
		}

		/**
		* Switch the Default data for the context of an outgoing emergency call.
		*
		* In some cases, we need to try to switch the Default Data subscription before placing the
		* emergency call on DSDS devices. This includes the following situation:
		* - The modem does not support processing GNSS SUPL requests on the non-default data
		* subscription. For some carriers that do not provide a control plane fallback mechanism, the
		* SUPL request will be dropped and we will not be able to get the user's location for the
		* emergency call. In this case, we need to swap default data temporarily.
		* @param phoneId The phone to use to evaluate whether or not the default data should be moved
		* to this subscription.
		* @param overrideTimeSec The amount of time to override the default data setting for after the
		* emergency call ends.
		* @param dataSwitchResult A {@link CompletableFuture} to be called with a {@link Boolean}
		* result when the default data switch has either completed (true) or
		* failed (false).
		*/
		public void overrideDefaultDataForEmergency(int phoneId, int overrideTimeSec,
		CompletableFuture<Boolean> dataSwitchResult) {
		validatePhoneId(phoneId);
		Message msg = obtainMessage(EVENT_OVERRIDE_DDS_FOR_EMERGENCY);
		EmergencyOverrideRequest request = new EmergencyOverrideRequest();
		request.mPhoneId = phoneId;
		request.mGnssOverrideTimeMs = overrideTimeSec * 1000;
		request.mOverrideCompleteFuture = dataSwitchResult;
		msg.obj = request;
		msg.sendToTarget();
		}

		private void sendRilCommands(int phoneId) {
		if (!SubscriptionManager.isValidPhoneId(phoneId) \|\| phoneId >= mNumPhones) return;

		@@ -819,7 +1029,15 @@ public class PhoneSwitcher extends Handler {
		// requests.
		private void updatePreferredDataPhoneId() {
		Phone voicePhone = findPhoneById(mPhoneIdInVoiceCall);
		if (voicePhone != null && voicePhone.getDataEnabledSettings().isDataEnabled(
		if (mEmergencyOverride != null && findPhoneById(mEmergencyOverride.mPhoneId) != null) {
		// Override DDS for emergency even if user data is not enabled, since it is an
		// emergency.
		// TODO: Provide a notification to the user that metered data is currently being
		// used during this period.
		log("updatePreferredDataPhoneId: preferred data overridden for emergency."
		+ " phoneId = " + mEmergencyOverride.mPhoneId);
		mPreferredDataPhoneId = mEmergencyOverride.mPhoneId;
		} else if (voicePhone != null && voicePhone.getDataEnabledSettings().isDataEnabled(
		ApnSetting.TYPE_DEFAULT)) {
		// If a phone is in call and user enabled its mobile data, we
		// should switch internet connection to it. Because the other modem

src/java/com/android/internal/telephony/imsphone/ImsPhone.java

+1 −0

Original line number	Diff line number	Diff line
		@@ -1601,6 +1601,7 @@ public class ImsPhone extends ImsPhoneBase {
		setIsInEcm(true);
		// notify change
		sendEmergencyCallbackModeChange();
		((GsmCdmaPhone) mDefaultPhone).notifyEmergencyCallRegistrants(true);

		// Post this runnable so we will automatically exit
		// if no one invokes exitEmergencyCallbackMode() directly.

tests/telephonytests/src/com/android/internal/telephony/PhoneSwitcherTest.java

+339 −16

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