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/*
* Copyright (C) 2020 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.server.connectivity;
import static android.net.QosCallbackException.EX_TYPE_FILTER_NONE;
import android.annotation.NonNull;
import android.net.IQosCallback;
import android.net.Network;
import android.net.QosCallbackException;
import android.net.QosFilter;
import android.net.QosSession;
import android.os.IBinder;
import android.os.RemoteException;
import android.telephony.data.EpsBearerQosSessionAttributes;
import android.telephony.data.NrQosSessionAttributes;
import android.util.Log;
import java.util.Objects;
/**
* Wraps callback related information and sends messages between network agent and the application.
* <p/>
* This is a satellite class of {@link com.android.server.ConnectivityService} and not meant
* to be used in other contexts.
*
* @hide
*/
class QosCallbackAgentConnection implements IBinder.DeathRecipient {
private static final String TAG = QosCallbackAgentConnection.class.getSimpleName();
private static final boolean DBG = false;
private final int mAgentCallbackId;
@NonNull private final QosCallbackTracker mQosCallbackTracker;
@NonNull private final IQosCallback mCallback;
@NonNull private final IBinder mBinder;
@NonNull private final QosFilter mFilter;
@NonNull private final NetworkAgentInfo mNetworkAgentInfo;
private final int mUid;
/**
* Gets the uid
* @return uid
*/
int getUid() {
return mUid;
}
/**
* Gets the binder
* @return binder
*/
@NonNull
IBinder getBinder() {
return mBinder;
}
/**
* Gets the callback id
*
* @return callback id
*/
int getAgentCallbackId() {
return mAgentCallbackId;
}
/**
* Gets the network tied to the callback of this connection
*
* @return network
*/
@NonNull
Network getNetwork() {
return mFilter.getNetwork();
}
QosCallbackAgentConnection(@NonNull final QosCallbackTracker qosCallbackTracker,
final int agentCallbackId,
@NonNull final IQosCallback callback,
@NonNull final QosFilter filter,
final int uid,
@NonNull final NetworkAgentInfo networkAgentInfo) {
Objects.requireNonNull(qosCallbackTracker, "qosCallbackTracker must be non-null");
Objects.requireNonNull(callback, "callback must be non-null");
Objects.requireNonNull(filter, "filter must be non-null");
Objects.requireNonNull(networkAgentInfo, "networkAgentInfo must be non-null");
mQosCallbackTracker = qosCallbackTracker;
mAgentCallbackId = agentCallbackId;
mCallback = callback;
mFilter = filter;
mUid = uid;
mBinder = mCallback.asBinder();
mNetworkAgentInfo = networkAgentInfo;
}
@Override
public void binderDied() {
logw("binderDied: binder died with callback id: " + mAgentCallbackId);
mQosCallbackTracker.unregisterCallback(mCallback);
}
void unlinkToDeathRecipient() {
mBinder.unlinkToDeath(this, 0);
}
// Returns false if the NetworkAgent was never notified.
boolean sendCmdRegisterCallback() {
final int exceptionType = mFilter.validate();
if (exceptionType != EX_TYPE_FILTER_NONE) {
try {
if (DBG) log("sendCmdRegisterCallback: filter validation failed");
mCallback.onError(exceptionType);
} catch (final RemoteException e) {
loge("sendCmdRegisterCallback:", e);
}
return false;
}
try {
mBinder.linkToDeath(this, 0);
} catch (final RemoteException e) {
loge("failed linking to death recipient", e);
return false;
}
mNetworkAgentInfo.onQosFilterCallbackRegistered(mAgentCallbackId, mFilter);
return true;
}
void sendCmdUnregisterCallback() {
if (DBG) log("sendCmdUnregisterCallback: unregistering");
mNetworkAgentInfo.onQosCallbackUnregistered(mAgentCallbackId);
}
void sendEventEpsQosSessionAvailable(final QosSession session,
final EpsBearerQosSessionAttributes attributes) {
try {
if (DBG) log("sendEventEpsQosSessionAvailable: sending...");
mCallback.onQosEpsBearerSessionAvailable(session, attributes);
} catch (final RemoteException e) {
loge("sendEventEpsQosSessionAvailable: remote exception", e);
}
}
void sendEventNrQosSessionAvailable(final QosSession session,
final NrQosSessionAttributes attributes) {
try {
if (DBG) log("sendEventNrQosSessionAvailable: sending...");
mCallback.onNrQosSessionAvailable(session, attributes);
} catch (final RemoteException e) {
loge("sendEventNrQosSessionAvailable: remote exception", e);
}
}
void sendEventQosSessionLost(@NonNull final QosSession session) {
try {
if (DBG) log("sendEventQosSessionLost: sending...");
mCallback.onQosSessionLost(session);
} catch (final RemoteException e) {
loge("sendEventQosSessionLost: remote exception", e);
}
}
void sendEventQosCallbackError(@QosCallbackException.ExceptionType final int exceptionType) {
try {
if (DBG) log("sendEventQosCallbackError: sending...");
mCallback.onError(exceptionType);
} catch (final RemoteException e) {
loge("sendEventQosCallbackError: remote exception", e);
}
}
private static void log(@NonNull final String msg) {
Log.d(TAG, msg);
}
private static void logw(@NonNull final String msg) {
Log.w(TAG, msg);
}
private static void loge(@NonNull final String msg, final Throwable t) {
Log.e(TAG, msg, t);
}
}
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