1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.dumprendertree2.forwarder;
18
19import android.util.Log;
20
21import java.io.IOException;
22import java.io.InputStream;
23import java.io.OutputStream;
24import java.net.Socket;
25
26/**
27 * The utility class that can setup a socket allowing the device to communicate with remote
28 * machines through the machine that the device is connected to via adb.
29 */
30public class AdbUtils {
31    private static final String LOG_TAG = "AdbUtils";
32
33    private static final String ADB_OK = "OKAY";
34    private static final int ADB_PORT = 5037;
35    private static final String ADB_HOST = "127.0.0.1";
36    private static final int ADB_RESPONSE_SIZE = 4;
37
38    /**
39     * Creates a new socket that can be configured to serve as a transparent proxy to a
40     * remote machine. This can be achieved by calling configureSocket()
41     *
42     * @return a socket that can be configured to link to remote machine
43     * @throws IOException
44     */
45    public static Socket createSocket() throws IOException{
46        return new Socket(ADB_HOST, ADB_PORT);
47    }
48
49    /**
50     * Configures the connection to serve as a transparent proxy to a remote machine.
51     * The given streams must belong to a socket created by createSocket().
52     *
53     * @param inputStream inputStream of the socket we want to configure
54     * @param outputStream outputStream of the socket we want to configure
55     * @param remoteAddress address of the remote machine (as you would type in a browser
56     *      in a machine that the device is connected to via adb)
57     * @param remotePort port on which to connect
58     * @return if the configuration suceeded
59     * @throws IOException
60     */
61    public static boolean configureConnection(InputStream inputStream, OutputStream outputStream,
62            String remoteAddress, int remotePort) throws IOException {
63        String cmd = "tcp:" + remotePort + ":" + remoteAddress;
64        cmd = String.format("%04X", cmd.length()) + cmd;
65
66        byte[] buf = new byte[ADB_RESPONSE_SIZE];
67        outputStream.write(cmd.getBytes());
68        int read = inputStream.read(buf);
69        if (read != ADB_RESPONSE_SIZE || !ADB_OK.equals(new String(buf))) {
70            Log.w(LOG_TAG, "adb cmd failed.");
71            return false;
72        }
73        return true;
74    }
75}
76