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/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.internal.telephony.domainselection;
import static android.telephony.AccessNetworkConstants.TRANSPORT_TYPE_INVALID;
import static android.telephony.AccessNetworkConstants.TRANSPORT_TYPE_WLAN;
import static android.telephony.AccessNetworkConstants.TRANSPORT_TYPE_WWAN;
import static android.telephony.DomainSelectionService.SELECTOR_TYPE_CALLING;
import static android.telephony.NetworkRegistrationInfo.DOMAIN_PS;
import static com.android.internal.telephony.PhoneConstants.DOMAIN_NON_3GPP_PS;
import static com.android.internal.telephony.emergency.EmergencyConstants.MODE_EMERGENCY_WLAN;
import static com.android.internal.telephony.emergency.EmergencyConstants.MODE_EMERGENCY_WWAN;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.telephony.AccessNetworkConstants.TransportType;
import android.telephony.Annotation.DisconnectCauses;
import android.telephony.Annotation.NetCapability;
import android.telephony.DomainSelectionService;
import android.telephony.EmergencyRegResult;
import android.telephony.NetworkRegistrationInfo;
import android.telephony.data.ApnSetting;
import android.telephony.ims.ImsReasonInfo;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.telephony.Phone;
import com.android.internal.telephony.data.AccessNetworksManager;
import com.android.internal.telephony.emergency.EmergencyStateTracker;
import java.util.concurrent.CompletableFuture;
/**
* Manages the information of request and the callback binder for emergency calling.
*/
public class EmergencyCallDomainSelectionConnection extends DomainSelectionConnection {
private static final boolean DBG = false;
private @NonNull EmergencyStateTracker mEmergencyStateTracker = null;
private @Nullable DomainSelectionConnectionCallback mCallback;
private @TransportType int mPreferredTransportType = TRANSPORT_TYPE_INVALID;
/**
* Create an instance.
*
* @param phone For which this service is requested.
* @param controller The controller to communicate with the domain selection service.
*/
public EmergencyCallDomainSelectionConnection(@NonNull Phone phone,
@NonNull DomainSelectionController controller) {
this(phone, controller, EmergencyStateTracker.getInstance());
}
/**
* Create an instance.
*
* @param phone For which this service is requested.
* @param controller The controller to communicate with the domain selection service.
* @param tracker The {@link EmergencyStateTracker} instance.
*/
@VisibleForTesting
public EmergencyCallDomainSelectionConnection(@NonNull Phone phone,
@NonNull DomainSelectionController controller, @NonNull EmergencyStateTracker tracker) {
super(phone, SELECTOR_TYPE_CALLING, true, controller);
mTag = "EmergencyCallDomainSelectionConnection";
mEmergencyStateTracker = tracker;
}
/** {@inheritDoc} */
@Override
public void onWlanSelected(boolean useEmergencyPdn) {
mEmergencyStateTracker.onEmergencyTransportChanged(
EmergencyStateTracker.EMERGENCY_TYPE_CALL, MODE_EMERGENCY_WLAN);
if (useEmergencyPdn) {
AccessNetworksManager anm = mPhone.getAccessNetworksManager();
int transportType = anm.getPreferredTransport(ApnSetting.TYPE_EMERGENCY);
logi("onWlanSelected curTransportType=" + transportType);
if (transportType != TRANSPORT_TYPE_WLAN) {
changePreferredTransport(TRANSPORT_TYPE_WLAN);
return;
}
}
CompletableFuture<Integer> future = getCompletableFuture();
if (future != null) future.complete(DOMAIN_NON_3GPP_PS);
}
/** {@inheritDoc} */
@Override
public void onWwanSelected() {
mEmergencyStateTracker.onEmergencyTransportChanged(
EmergencyStateTracker.EMERGENCY_TYPE_CALL, MODE_EMERGENCY_WWAN);
}
/** {@inheritDoc} */
@Override
public void onSelectionTerminated(@DisconnectCauses int cause) {
if (mCallback != null) mCallback.onSelectionTerminated(cause);
}
/** {@inheritDoc} */
@Override
public void onDomainSelected(@NetworkRegistrationInfo.Domain int domain,
boolean useEmergencyPdn) {
if (domain == DOMAIN_PS && useEmergencyPdn) {
AccessNetworksManager anm = mPhone.getAccessNetworksManager();
int transportType = anm.getPreferredTransport(ApnSetting.TYPE_EMERGENCY);
logi("onDomainSelected curTransportType=" + transportType);
if (transportType != TRANSPORT_TYPE_WWAN) {
changePreferredTransport(TRANSPORT_TYPE_WWAN);
return;
}
}
super.onDomainSelected(domain, useEmergencyPdn);
}
/**
* Request a domain for emergency call.
*
* @param attr The attributes required to determine the domain.
* @param callback A callback to receive the response.
* @return the callback to receive the response.
*/
public @NonNull CompletableFuture<Integer> createEmergencyConnection(
@NonNull DomainSelectionService.SelectionAttributes attr,
@NonNull DomainSelectionConnectionCallback callback) {
mCallback = callback;
selectDomain(attr);
return getCompletableFuture();
}
private void changePreferredTransport(@TransportType int transportType) {
logi("changePreferredTransport " + transportType);
initHandler();
mPreferredTransportType = transportType;
AccessNetworksManager anm = mPhone.getAccessNetworksManager();
anm.registerForQualifiedNetworksChanged(mHandler, EVENT_QUALIFIED_NETWORKS_CHANGED);
mPhone.notifyEmergencyDomainSelected(transportType);
}
private AccessNetworksManager.AccessNetworksManagerCallback mPreferredTransportCallback =
new AccessNetworksManager.AccessNetworksManagerCallback(Runnable::run) {
@Override
public void onPreferredTransportChanged(@NetCapability int capability) {
}
};
/** {@inheritDoc} */
@Override
protected void onQualifiedNetworksChanged() {
AccessNetworksManager anm = mPhone.getAccessNetworksManager();
int preferredTransport = anm.getPreferredTransport(ApnSetting.TYPE_EMERGENCY);
logi("onQualifiedNetworksChanged preferred=" + mPreferredTransportType
+ ", current=" + preferredTransport);
if (preferredTransport == mPreferredTransportType) {
CompletableFuture<Integer> future = getCompletableFuture();
if (future != null) {
if (preferredTransport == TRANSPORT_TYPE_WLAN) {
future.complete(DOMAIN_NON_3GPP_PS);
} else {
future.complete(DOMAIN_PS);
}
}
anm.unregisterForQualifiedNetworksChanged(mHandler);
}
}
/** {@inheritDoc} */
@Override
public void cancelSelection() {
logi("cancelSelection");
AccessNetworksManager anm = mPhone.getAccessNetworksManager();
anm.unregisterForQualifiedNetworksChanged(mHandler);
super.cancelSelection();
}
/**
* Returns the attributes required to determine the domain for a telephony service.
*
* @param slotId The slot identifier.
* @param subId The subscription identifier.
* @param exited {@code true} if the request caused the device to move out of airplane mode.
* @param callId The call identifier.
* @param number The dialed number.
* @param callFailCause The reason why the last CS attempt failed.
* @param imsReasonInfo The reason why the last PS attempt failed.
* @param emergencyRegResult The current registration result for emergency services.
* @return The attributes required to determine the domain.
*/
public static @NonNull DomainSelectionService.SelectionAttributes getSelectionAttributes(
int slotId, int subId, boolean exited,
@NonNull String callId, @NonNull String number, int callFailCause,
@Nullable ImsReasonInfo imsReasonInfo,
@Nullable EmergencyRegResult emergencyRegResult) {
DomainSelectionService.SelectionAttributes.Builder builder =
new DomainSelectionService.SelectionAttributes.Builder(
slotId, subId, SELECTOR_TYPE_CALLING)
.setEmergency(true)
.setExitedFromAirplaneMode(exited)
.setCallId(callId)
.setNumber(number)
.setCsDisconnectCause(callFailCause);
if (imsReasonInfo != null) builder.setPsDisconnectCause(imsReasonInfo);
if (emergencyRegResult != null) builder.setEmergencyRegResult(emergencyRegResult);
return builder.build();
}
}
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