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      1 /*
      2  * Copyright (C) 2009 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 
     17 package com.android.dumprendertree.forwarder;
     18 
     19 import android.util.Log;
     20 
     21 import java.io.DataInputStream;
     22 import java.io.IOException;
     23 import java.io.InputStream;
     24 import java.io.OutputStream;
     25 import java.net.Socket;
     26 
     27 public class AdbUtils {
     28 
     29     private static final String ADB_OK = "OKAY";
     30     private static final int ADB_PORT = 5037;
     31     private static final String ADB_HOST = "127.0.0.1";
     32     private static final int ADB_RESPONSE_SIZE = 4;
     33 
     34     private static final String LOGTAG = "AdbUtils";
     35 
     36     /**
     37      *
     38      * Convert integer format IP into xxx.xxx.xxx.xxx format
     39      *
     40      * @param host IP address in integer format
     41      * @return human readable format
     42      */
     43     public static String convert(int host) {
     44         return ((host >> 24) & 0xFF) + "."
     45         + ((host >> 16) & 0xFF) + "."
     46         + ((host >> 8) & 0xFF) + "."
     47         + (host & 0xFF);
     48     }
     49 
     50     /**
     51      *
     52      * Resolve DNS name into IP address
     53      *
     54      * @param host DNS name
     55      * @return IP address in integer format
     56      * @throws IOException
     57      */
     58     public static int resolve(String host)  throws IOException {
     59         Socket localSocket = new Socket(ADB_HOST, ADB_PORT);
     60         DataInputStream dis = new DataInputStream(localSocket.getInputStream());
     61         OutputStream os = localSocket.getOutputStream();
     62         int count_read = 0;
     63 
     64         if (localSocket == null || dis == null || os == null)
     65             return -1;
     66         String cmd = "dns:" + host;
     67 
     68         if(!sendAdbCmd(dis, os, cmd))
     69             return -1;
     70 
     71         count_read = dis.readInt();
     72         localSocket.close();
     73         return count_read;
     74     }
     75 
     76     /**
     77      *
     78      * Send an ADB command using existing socket connection
     79      *
     80      * the streams provided must be from a socket connected to adbd already
     81      *
     82      * @param is input stream of the socket connection
     83      * @param os output stream of the socket
     84      * @param cmd the adb command to send
     85      * @return if adb gave a success response
     86      * @throws IOException
     87      */
     88     public static boolean sendAdbCmd(InputStream is, OutputStream os,
     89             String cmd) throws IOException {
     90         byte[] buf = new byte[ADB_RESPONSE_SIZE];
     91 
     92         cmd = String.format("%04X", cmd.length()) + cmd;
     93         os.write(cmd.getBytes());
     94         int read = is.read(buf);
     95         if(read != ADB_RESPONSE_SIZE || !ADB_OK.equals(new String(buf))) {
     96             Log.w(LOGTAG, "adb cmd faild.");
     97             return false;
     98         }
     99         return true;
    100     }
    101 
    102     /**
    103      *
    104      * Get a tcp socket connection to specified IP address and port proxied by adb
    105      *
    106      * The proxying is transparent, e.g. if a socket is returned, then it can be written to and
    107      * read from as if it is directly connected to the target
    108      *
    109      * @param remoteAddress IP address of the host to connect to
    110      * @param remotePort port of the host to connect to
    111      * @return a valid Socket instance if successful, null otherwise
    112      */
    113     public static Socket getForwardedSocket(int remoteAddress, int remotePort) {
    114         try {
    115             Socket socket = new Socket(ADB_HOST, ADB_PORT);
    116             String cmd = "tcp:" + remotePort + ":" + convert(remoteAddress);
    117             if(!sendAdbCmd(socket.getInputStream(), socket.getOutputStream(), cmd)) {
    118                 socket.close();
    119                 return null;
    120             }
    121             return socket;
    122         } catch (IOException ioe) {
    123             Log.w(LOGTAG, "error creating adb socket", ioe);
    124             return null;
    125         }
    126     }
    127 }
    128