1 /*

     2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 import java.io.IOException;

    25 import java.io.InputStream;

    26 import java.net.Socket;

    27 import java.util.Arrays;

    28 

    29 /**

    30  * JDWP socket transport

    31  */

    32 public class JdwpChannel {

    33 

    34     private Socket sock;

    35 

    36     public void connect() throws IOException {

    37         sock = new Socket("localhost", DebuggeeLauncher.getJdwpPort());

    38         handshake();

    39     }

    40 

    41     /**

    42      * Sends JDWP handshake and verifies the reply

    43      * @throws IOException

    44      */

    45     private void handshake() throws IOException {

    46         final byte[] HANDSHAKE = "JDWP-Handshake".getBytes();

    47         sock.getOutputStream().write(HANDSHAKE, 0, HANDSHAKE.length);

    48 

    49         byte[] reply = new byte[14];

    50         sock.getInputStream().read(reply, 0, 14);

    51         if (!Arrays.equals(HANDSHAKE, reply)) {

    52             throw new RuntimeException("Error during handshake. Reply was: " + new String(reply) + " expected " + new String(HANDSHAKE));

    53         }

    54     }

    55 

    56     public void disconnect() {

    57         try {

    58             sock.close();

    59         } catch (IOException x) {

    60         }

    61     }

    62 

    63     public void write(byte[] data, int length) throws IOException {

    64         sock.getOutputStream().write(data, 0, length);

    65     }

    66 

    67     public InputStream getInputStream() throws IOException {

    68         return sock.getInputStream();

    69     }

    70 

    71 }