1/*
2 * Copyright (c) 2015, 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// SunJSSE does not support dynamic system properties, no way to re-use
25// system properties in samevm/agentvm mode.
26
27/*
28 * @test
29 * @bug 8043758
30 * @summary Datagram Transport Layer Security (DTLS)
31 * @modules java.base/sun.security.util
32 * @build DTLSOverDatagram
33 * @run main/othervm Retransmission
34 */
35
36import java.util.List;
37import java.util.ArrayList;
38import java.net.DatagramPacket;
39import java.net.SocketAddress;
40import javax.net.ssl.SSLEngine;
41
42/**
43 * Test that DTLS implementation is able to do retransmission internally
44 * automatically if packet get lost.
45 */
46public class Retransmission extends DTLSOverDatagram {
47    boolean needPacketLoss = true;
48
49    public static void main(String[] args) throws Exception {
50        Retransmission testCase = new Retransmission();
51        testCase.runTest(testCase);
52    }
53
54    @Override
55    boolean produceHandshakePackets(SSLEngine engine, SocketAddress socketAddr,
56            String side, List<DatagramPacket> packets) throws Exception {
57
58        boolean finished = super.produceHandshakePackets(
59                engine, socketAddr, side, packets);
60
61        if (!needPacketLoss || (!engine.getUseClientMode())) {
62            return finished;
63        }
64
65        List<DatagramPacket> parts = new ArrayList<>();
66        int lostSeq = 2;
67        for (DatagramPacket packet : packets) {
68            lostSeq--;
69            if (lostSeq == 0) {
70                needPacketLoss = false;
71                // loss this packet
72                System.out.println("Loss a packet");
73                continue;
74            }
75
76            parts.add(packet);
77        }
78
79        packets.clear();
80        packets.addAll(parts);
81
82        return finished;
83    }
84}
85