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Commit 30a8f7ef authored by Lorenzo Colitti's avatar Lorenzo Colitti Committed by Remi NGUYEN VAN
Browse files

Support putting one Ethernet interface in server mode. 

requestTetheredInterface can be used to put an interface in server mode,
which will persist until release() is called on the returned request, or
until the requesting process dies.

Test: Enabled ethernet tethering with change on top
Bug: 130840861
Change-Id: Id96d581acb3fa4e52ca62dd94ec257f56bd3a1ce
parent 31ef4c05

core/java/android/net/EthernetManager.java

+77 −1
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 


package android.net;



import android.annotation.NonNull;

import android.annotation.SystemService;

import android.compat.annotation.UnsupportedAppUsage;

import android.content.Context;
@@ -24,6 +25,7 @@ import android.os.Message; 
import android.os.RemoteException;



import java.util.ArrayList;

import java.util.Objects;



/**

 * A class representing the IP configuration of the Ethernet network.
@@ -37,7 +39,7 @@ public class EthernetManager { 


    private final Context mContext;

    private final IEthernetManager mService;

    private final Handler mHandler = new Handler() {

    private final Handler mHandler = new Handler(ConnectivityThread.getInstanceLooper()) {

        @Override

        public void handleMessage(Message msg) {

            if (msg.what == MSG_AVAILABILITY_CHANGED) {
@@ -180,4 +182,78 @@ public class EthernetManager { 
            }

        }

    }



    /**

     * A request for a tethered interface.

     */

    public static class TetheredInterfaceRequest {

        private final IEthernetManager mService;

        private final ITetheredInterfaceCallback mCb;



        private TetheredInterfaceRequest(@NonNull IEthernetManager service,

                @NonNull ITetheredInterfaceCallback cb) {

            this.mService = service;

            this.mCb = cb;

        }



        /**

         * Release the request, causing the interface to revert back from tethering mode if there

         * is no other requestor.

         */

        public void release() {

            try {

                mService.releaseTetheredInterface(mCb);

            } catch (RemoteException e) {

                e.rethrowFromSystemServer();

            }

        }

    }



    /**

     * Callback for {@link #requestTetheredInterface(TetheredInterfaceCallback)}.

     */

    public interface TetheredInterfaceCallback {

        /**

         * Called when the tethered interface is available.

         * @param iface The name of the interface.

         */

        void onAvailable(@NonNull String iface);



        /**

         * Called when the tethered interface is now unavailable.

         */

        void onUnavailable();

    }



    /**

     * Request a tethered interface in tethering mode.

     *

     * <p>When this method is called and there is at least one ethernet interface available, the

     * system will designate one to act as a tethered interface. If there is already a tethered

     * interface, the existing interface will be used.

     * @param callback A callback to be called once the request has been fulfilled.

     */

    @NonNull

    public TetheredInterfaceRequest requestTetheredInterface(

            @NonNull TetheredInterfaceCallback callback) {

        Objects.requireNonNull(callback, "Callback must be non-null");

        final ITetheredInterfaceCallback cbInternal = new ITetheredInterfaceCallback.Stub() {

            @Override

            public void onAvailable(String iface) {

                callback.onAvailable(iface);

            }



            @Override

            public void onUnavailable() {

                callback.onUnavailable();

            }

        };



        try {

            mService.requestTetheredInterface(cbInternal);

        } catch (RemoteException e) {

            throw e.rethrowFromSystemServer();

        }

        return new TetheredInterfaceRequest(mService, cbInternal);

    }

}

core/java/android/net/IEthernetManager.aidl

+3 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ package android.net; 


import android.net.IpConfiguration;

import android.net.IEthernetServiceListener;

import android.net.ITetheredInterfaceCallback;



/**

 * Interface that answers queries about, and allows changing
@@ -32,4 +33,6 @@ interface IEthernetManager 
    boolean isAvailable(String iface);

    void addListener(in IEthernetServiceListener listener);

    void removeListener(in IEthernetServiceListener listener);

    void requestTetheredInterface(in ITetheredInterfaceCallback callback);

    void releaseTetheredInterface(in ITetheredInterfaceCallback callback);

}

core/java/android/net/ITetheredInterfaceCallback.aidl

0 → 100644
+23 −0
Original line number Diff line number Diff line 
/*

 * 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 android.net;



/** @hide */

interface ITetheredInterfaceCallback {

    void onAvailable(in String iface);

    void onUnavailable();

}
 
 No newline at end of file