Move module sources to packages/Connectivity
Files that are planned to be part of the connectivity module are grouped in packages/Connectivity, so they can be built separately and moved in one operation with their history into packages/modules/Connectivity. This places the files in the existing framework-connectivity-sources filegroup instead of the current framework-core-sources filegroup. Both are used the same way in framework-non-updatable-sources. Bug: 171540887 Test: m Change-Id: I62d9d91574ace6f5c4624035d190260c3126b91e
This commit is contained in:
Remi NGUYEN VAN
301
framework/src/android/net/SocketKeepalive.java
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301
framework/src/android/net/SocketKeepalive.java
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/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.net;
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import android.annotation.IntDef;
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import android.annotation.IntRange;
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import android.annotation.NonNull;
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import android.annotation.Nullable;
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import android.annotation.SystemApi;
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import android.os.Binder;
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import android.os.ParcelFileDescriptor;
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import android.os.RemoteException;
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import java.io.IOException;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.util.concurrent.Executor;
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/**
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* Allows applications to request that the system periodically send specific packets on their
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* behalf, using hardware offload to save battery power.
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*
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* To request that the system send keepalives, call one of the methods that return a
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* {@link SocketKeepalive} object, such as {@link ConnectivityManager#createSocketKeepalive},
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* passing in a non-null callback. If the {@link SocketKeepalive} is successfully
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* started, the callback's {@code onStarted} method will be called. If an error occurs,
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* {@code onError} will be called, specifying one of the {@code ERROR_*} constants in this
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* class.
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*
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* To stop an existing keepalive, call {@link SocketKeepalive#stop}. The system will call
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* {@link SocketKeepalive.Callback#onStopped} if the operation was successful or
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* {@link SocketKeepalive.Callback#onError} if an error occurred.
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*
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* For cellular, the device MUST support at least 1 keepalive slot.
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*
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* For WiFi, the device SHOULD support keepalive offload. If it does not, it MUST reply with
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* {@link SocketKeepalive.Callback#onError} with {@code ERROR_UNSUPPORTED} to any keepalive offload
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* request. If it does, it MUST support at least 3 concurrent keepalive slots.
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*/
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public abstract class SocketKeepalive implements AutoCloseable {
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static final String TAG = "SocketKeepalive";
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/**
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* No errors.
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* @hide
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*/
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@SystemApi
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public static final int SUCCESS = 0;
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/** @hide */
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public static final int NO_KEEPALIVE = -1;
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/** @hide */
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public static final int DATA_RECEIVED = -2;
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/** @hide */
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public static final int BINDER_DIED = -10;
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/** The specified {@code Network} is not connected. */
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public static final int ERROR_INVALID_NETWORK = -20;
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/** The specified IP addresses are invalid. For example, the specified source IP address is
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* not configured on the specified {@code Network}. */
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public static final int ERROR_INVALID_IP_ADDRESS = -21;
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/** The requested port is invalid. */
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public static final int ERROR_INVALID_PORT = -22;
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/** The packet length is invalid (e.g., too long). */
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public static final int ERROR_INVALID_LENGTH = -23;
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/** The packet transmission interval is invalid (e.g., too short). */
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public static final int ERROR_INVALID_INTERVAL = -24;
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/** The target socket is invalid. */
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public static final int ERROR_INVALID_SOCKET = -25;
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/** The target socket is not idle. */
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public static final int ERROR_SOCKET_NOT_IDLE = -26;
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/**
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* The stop reason is uninitialized. This should only be internally used as initial state
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* of stop reason, instead of propagating to application.
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* @hide
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*/
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public static final int ERROR_STOP_REASON_UNINITIALIZED = -27;
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/** The device does not support this request. */
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public static final int ERROR_UNSUPPORTED = -30;
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/** @hide TODO: delete when telephony code has been updated. */
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public static final int ERROR_HARDWARE_UNSUPPORTED = ERROR_UNSUPPORTED;
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/** The hardware returned an error. */
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public static final int ERROR_HARDWARE_ERROR = -31;
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/** The limitation of resource is reached. */
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public static final int ERROR_INSUFFICIENT_RESOURCES = -32;
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/** @hide */
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@Retention(RetentionPolicy.SOURCE)
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@IntDef(prefix = { "ERROR_" }, value = {
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ERROR_INVALID_NETWORK,
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ERROR_INVALID_IP_ADDRESS,
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ERROR_INVALID_PORT,
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ERROR_INVALID_LENGTH,
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ERROR_INVALID_INTERVAL,
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ERROR_INVALID_SOCKET,
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ERROR_SOCKET_NOT_IDLE
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})
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public @interface ErrorCode {}
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/** @hide */
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@Retention(RetentionPolicy.SOURCE)
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@IntDef(value = {
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SUCCESS,
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ERROR_INVALID_LENGTH,
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ERROR_UNSUPPORTED,
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ERROR_INSUFFICIENT_RESOURCES,
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ERROR_HARDWARE_UNSUPPORTED
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})
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public @interface KeepaliveEvent {}
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/**
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* The minimum interval in seconds between keepalive packet transmissions.
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*
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* @hide
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**/
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public static final int MIN_INTERVAL_SEC = 10;
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/**
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* The maximum interval in seconds between keepalive packet transmissions.
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*
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* @hide
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**/
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public static final int MAX_INTERVAL_SEC = 3600;
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/**
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* An exception that embarks an error code.
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* @hide
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*/
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public static class ErrorCodeException extends Exception {
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public final int error;
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public ErrorCodeException(final int error, final Throwable e) {
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super(e);
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this.error = error;
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}
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public ErrorCodeException(final int error) {
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this.error = error;
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}
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}
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/**
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* This socket is invalid.
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* See the error code for details, and the optional cause.
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* @hide
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*/
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public static class InvalidSocketException extends ErrorCodeException {
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public InvalidSocketException(final int error, final Throwable e) {
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super(error, e);
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}
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public InvalidSocketException(final int error) {
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super(error);
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}
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}
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@NonNull final IConnectivityManager mService;
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@NonNull final Network mNetwork;
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@NonNull final ParcelFileDescriptor mPfd;
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@NonNull final Executor mExecutor;
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@NonNull final ISocketKeepaliveCallback mCallback;
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// TODO: remove slot since mCallback could be used to identify which keepalive to stop.
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@Nullable Integer mSlot;
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SocketKeepalive(@NonNull IConnectivityManager service, @NonNull Network network,
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@NonNull ParcelFileDescriptor pfd,
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@NonNull Executor executor, @NonNull Callback callback) {
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mService = service;
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mNetwork = network;
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mPfd = pfd;
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mExecutor = executor;
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mCallback = new ISocketKeepaliveCallback.Stub() {
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@Override
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public void onStarted(int slot) {
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final long token = Binder.clearCallingIdentity();
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try {
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mExecutor.execute(() -> {
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mSlot = slot;
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callback.onStarted();
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});
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} finally {
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Binder.restoreCallingIdentity(token);
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}
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}
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@Override
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public void onStopped() {
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final long token = Binder.clearCallingIdentity();
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try {
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executor.execute(() -> {
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mSlot = null;
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callback.onStopped();
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});
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} finally {
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Binder.restoreCallingIdentity(token);
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}
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}
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@Override
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public void onError(int error) {
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final long token = Binder.clearCallingIdentity();
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try {
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executor.execute(() -> {
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mSlot = null;
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callback.onError(error);
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});
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} finally {
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Binder.restoreCallingIdentity(token);
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}
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}
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@Override
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public void onDataReceived() {
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final long token = Binder.clearCallingIdentity();
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try {
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executor.execute(() -> {
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mSlot = null;
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callback.onDataReceived();
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});
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} finally {
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Binder.restoreCallingIdentity(token);
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}
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}
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};
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}
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/**
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* Request that keepalive be started with the given {@code intervalSec}. See
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* {@link SocketKeepalive}. If the remote binder dies, or the binder call throws an exception
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* when invoking start or stop of the {@link SocketKeepalive}, a {@link RemoteException} will be
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* thrown into the {@code executor}. This is typically not important to catch because the remote
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* party is the system, so if it is not in shape to communicate through binder the system is
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* probably going down anyway. If the caller cares regardless, it can use a custom
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* {@link Executor} to catch the {@link RemoteException}.
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*
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* @param intervalSec The target interval in seconds between keepalive packet transmissions.
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* The interval should be between 10 seconds and 3600 seconds, otherwise
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* {@link #ERROR_INVALID_INTERVAL} will be returned.
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*/
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public final void start(@IntRange(from = MIN_INTERVAL_SEC, to = MAX_INTERVAL_SEC)
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int intervalSec) {
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startImpl(intervalSec);
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}
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abstract void startImpl(int intervalSec);
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/**
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* Requests that keepalive be stopped. The application must wait for {@link Callback#onStopped}
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* before using the object. See {@link SocketKeepalive}.
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*/
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public final void stop() {
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stopImpl();
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}
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abstract void stopImpl();
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/**
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* Deactivate this {@link SocketKeepalive} and free allocated resources. The instance won't be
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* usable again if {@code close()} is called.
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*/
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@Override
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public final void close() {
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stop();
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try {
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mPfd.close();
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} catch (IOException e) {
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// Nothing much can be done.
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}
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}
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/**
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* The callback which app can use to learn the status changes of {@link SocketKeepalive}. See
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* {@link SocketKeepalive}.
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*/
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public static class Callback {
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/** The requested keepalive was successfully started. */
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public void onStarted() {}
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/** The keepalive was successfully stopped. */
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public void onStopped() {}
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/** An error occurred. */
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public void onError(@ErrorCode int error) {}
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/** The keepalive on a TCP socket was stopped because the socket received data. This is
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* never called for UDP sockets. */
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public void onDataReceived() {}
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}
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}
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