1 /*
   2  * Copyright (c) 2015, 2019, 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  * @library /test/lib
  33  * @build DTLSOverDatagram
  34  * @run main/othervm Retransmission
  35  */
  36 
  37 import java.util.List;
  38 import java.util.ArrayList;
  39 import java.net.DatagramPacket;
  40 import java.net.SocketAddress;
  41 import javax.net.ssl.SSLEngine;
  42 
  43 /**
  44  * Test that DTLS implementation is able to do retransmission internally
  45  * automatically if packet get lost.
  46  */
  47 public class Retransmission extends DTLSOverDatagram {
  48     boolean needPacketLoss = true;
  49 
  50     public static void main(String[] args) throws Exception {
  51         Retransmission testCase = new Retransmission();
  52         testCase.runTest(testCase);
  53     }
  54 
  55     @Override
  56     boolean produceHandshakePackets(SSLEngine engine, SocketAddress socketAddr,
  57             String side, List<DatagramPacket> packets) throws Exception {
  58 
  59         boolean finished = super.produceHandshakePackets(
  60                 engine, socketAddr, side, packets);
  61 
  62         if (!needPacketLoss || (!engine.getUseClientMode())) {
  63             return finished;
  64         }
  65 
  66         List<DatagramPacket> parts = new ArrayList<>();
  67         int lostSeq = 2;
  68         for (DatagramPacket packet : packets) {
  69             lostSeq--;
  70             if (lostSeq == 0) {
  71                 needPacketLoss = false;
  72                 // loss this packet
  73                 System.out.println("Loss a packet");
  74                 continue;
  75             }
  76 
  77             parts.add(packet);
  78         }
  79 
  80         packets.clear();
  81         packets.addAll(parts);
  82 
  83         return finished;
  84     }
  85 }