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 
connect()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      */
handshake()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 
disconnect()56     public void disconnect() {
57         try {
58             sock.close();
59         } catch (IOException x) {
60         }
61     }
62 
write(byte[] data, int length)63     public void write(byte[] data, int length) throws IOException {
64         sock.getOutputStream().write(data, 0, length);
65     }
66 
getInputStream()67     public InputStream getInputStream() throws IOException {
68         return sock.getInputStream();
69     }
70 
71 }
72