1/*
2 * Copyright (c) 2001, 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/* @test
25 * @bug 4313882 4981129 8143610
26 * @summary Unit test for datagram-socket-channel adaptors
27 * @library ..
28 * @key randomness
29 */
30
31import java.net.*;
32import java.nio.channels.*;
33import java.util.*;
34
35
36public class AdaptDatagramSocket {
37
38    static java.io.PrintStream out = System.out;
39    static Random rand = new Random();
40
41    static String toString(DatagramPacket dp) {
42        return ("DatagramPacket[off=" + dp.getOffset()
43                + ", len=" + dp.getLength()
44                + "]");
45    }
46
47    static void test(DatagramSocket ds, InetSocketAddress dst,
48                     boolean shouldTimeout)
49        throws Exception
50    {
51        DatagramPacket op = new DatagramPacket(new byte[100], 13, 42, dst);
52        rand.nextBytes(op.getData());
53        DatagramPacket ip = new DatagramPacket(new byte[100], 19, 100 - 19);
54        out.println("pre  op: " + toString(op) + "  ip: " + toString(ip));
55
56        long start = System.currentTimeMillis();
57        ds.send(op);
58
59        for (;;) {
60            try {
61                ds.receive(ip);
62                if (ip.getLength() == 0) { // ## Not sure why this happens
63                    ip.setLength(100 - 19);
64                    continue;
65                }
66            } catch (SocketTimeoutException x) {
67                if (shouldTimeout) {
68                    out.println("Receive timed out, as expected");
69                    return;
70                }
71                throw x;
72            }
73            break;
74        }
75
76        out.println("rtt: " + (System.currentTimeMillis() - start));
77        out.println("post op: " + toString(op) + "  ip: " + toString(ip));
78
79        for (int i = 0; i < ip.getLength(); i++) {
80            if (ip.getData()[ip.getOffset() + i]
81                != op.getData()[op.getOffset() + i])
82                throw new Exception("Incorrect data received");
83        }
84
85        if (!(ip.getSocketAddress().equals(dst))) {
86            throw new Exception("Incorrect sender address, expected: " + dst
87                + " actual: " + ip.getSocketAddress());
88        }
89    }
90
91    static void test(InetSocketAddress dst,
92                     int timeout, boolean shouldTimeout,
93                     boolean connect)
94        throws Exception
95    {
96        out.println();
97        out.println("dst: " + dst);
98
99        DatagramSocket ds;
100        if (false) {
101            // Original
102            ds = new DatagramSocket();
103        } else {
104            DatagramChannel dc = DatagramChannel.open();
105            ds = dc.socket();
106            ds.bind(new InetSocketAddress(0));
107        }
108
109        out.println("socket: " + ds);
110        if (connect) {
111            ds.connect(dst);
112            out.println("connect: " + ds);
113        }
114        InetSocketAddress src = new InetSocketAddress(ds.getLocalAddress(),
115                                                      ds.getLocalPort());
116        out.println("src: " + src);
117
118        if (timeout > 0)
119            ds.setSoTimeout(timeout);
120        out.println("timeout: " + ds.getSoTimeout());
121
122        for (int i = 0; i < 5; i++) {
123            test(ds, dst, shouldTimeout);
124        }
125
126        // Leave the socket open so that we don't reuse the old src address
127        //ds.close();
128
129    }
130
131    public static void main(String[] args) throws Exception {
132        // need an UDP echo server
133        try (TestServers.UdpEchoServer echoServer
134                = TestServers.UdpEchoServer.startNewServer(100)) {
135            final InetSocketAddress address
136                = new InetSocketAddress(echoServer.getAddress(),
137                                        echoServer.getPort());
138            test(address, 0, false, false);
139            test(address, 0, false, true);
140            test(address, Integer.MAX_VALUE, false, false);
141        }
142        try (TestServers.UdpDiscardServer discardServer
143                = TestServers.UdpDiscardServer.startNewServer()) {
144            final InetSocketAddress address
145                = new InetSocketAddress(discardServer.getAddress(),
146                                        discardServer.getPort());
147            test(address, 10, true, false);
148        }
149    }
150
151}
152