1/*
2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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.
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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.
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22 */
23
24/* @test
25 * @bug 4640544 8044773
26 * @summary Unit test to check SocketChannel setOption/getOption/options
27 *          methods.
28 * @run main SocketOptionTests
29 * @run main/othervm --limit-modules=java.base SocketOptionTests
30 */
31
32import java.nio.*;
33import java.nio.channels.*;
34import java.net.*;
35import java.io.IOException;
36import java.util.*;
37import static java.net.StandardSocketOptions.*;
38
39public class SocketOptionTests {
40
41    static void checkOption(SocketChannel sc, SocketOption name, Object expectedValue)
42        throws IOException
43    {
44        Object value = sc.getOption(name);
45        if (!value.equals(expectedValue))
46            throw new RuntimeException("value not as expected");
47    }
48
49    public static void main(String[] args) throws IOException {
50        SocketChannel sc = SocketChannel.open();
51
52        // check supported options
53        Set<SocketOption<?>> options = sc.supportedOptions();
54        List<? extends SocketOption> expected = Arrays.asList(SO_SNDBUF, SO_RCVBUF,
55            SO_KEEPALIVE, SO_REUSEADDR, SO_LINGER, TCP_NODELAY);
56        for (SocketOption opt: expected) {
57            if (!options.contains(opt))
58                throw new RuntimeException(opt.name() + " should be supported");
59        }
60
61        // check specified defaults
62        int linger = sc.<Integer>getOption(SO_LINGER);
63        if (linger >= 0)
64            throw new RuntimeException("initial value of SO_LINGER should be < 0");
65        checkOption(sc, SO_KEEPALIVE, false);
66        checkOption(sc, TCP_NODELAY, false);
67
68        // allowed to change when not bound
69        sc.setOption(SO_KEEPALIVE, true);
70        checkOption(sc, SO_KEEPALIVE, true);
71        sc.setOption(SO_KEEPALIVE, false);
72        checkOption(sc, SO_KEEPALIVE, false);
73        sc.setOption(SO_SNDBUF, 128*1024);      // can't check
74        sc.setOption(SO_RCVBUF, 256*1024);      // can't check
75        int before, after;
76        before = sc.getOption(SO_SNDBUF);
77        after = sc.setOption(SO_SNDBUF, Integer.MAX_VALUE).getOption(SO_SNDBUF);
78        if (after < before)
79            throw new RuntimeException("setOption caused SO_SNDBUF to decrease");
80        before = sc.getOption(SO_RCVBUF);
81        after = sc.setOption(SO_RCVBUF, Integer.MAX_VALUE).getOption(SO_RCVBUF);
82        if (after < before)
83            throw new RuntimeException("setOption caused SO_RCVBUF to decrease");
84        sc.setOption(SO_REUSEADDR, true);
85        checkOption(sc, SO_REUSEADDR, true);
86        sc.setOption(SO_REUSEADDR, false);
87        checkOption(sc, SO_REUSEADDR, false);
88        sc.setOption(SO_LINGER, 10);
89        linger = sc.<Integer>getOption(SO_LINGER);
90        if (linger < 1)
91            throw new RuntimeException("expected linger to be enabled");
92        sc.setOption(SO_LINGER, -1);
93        linger = sc.<Integer>getOption(SO_LINGER);
94        if (linger >= 0)
95            throw new RuntimeException("expected linger to be disabled");
96        sc.setOption(TCP_NODELAY, true);
97        checkOption(sc, TCP_NODELAY, true);
98        sc.setOption(TCP_NODELAY, false);       // can't check
99
100        // bind socket
101        sc.bind(new InetSocketAddress(0));
102
103        // allow to change when bound
104        sc.setOption(SO_KEEPALIVE, true);
105        checkOption(sc, SO_KEEPALIVE, true);
106        sc.setOption(SO_KEEPALIVE, false);
107        checkOption(sc, SO_KEEPALIVE, false);
108
109        sc.setOption(SO_LINGER, 10);
110        linger = sc.<Integer>getOption(SO_LINGER);
111        if (linger < 1)
112            throw new RuntimeException("expected linger to be enabled");
113        sc.setOption(SO_LINGER, -1);
114        linger = sc.<Integer>getOption(SO_LINGER);
115        if (linger >= 0)
116            throw new RuntimeException("expected linger to be disabled");
117        sc.setOption(TCP_NODELAY, true);        // can't check
118        sc.setOption(TCP_NODELAY, false);       // can't check
119
120        // NullPointerException
121        try {
122            sc.setOption(null, "value");
123            throw new RuntimeException("NullPointerException not thrown");
124        } catch (NullPointerException x) {
125        }
126        try {
127            sc.getOption(null);
128            throw new RuntimeException("NullPointerException not thrown");
129        } catch (NullPointerException x) {
130        }
131
132        // ClosedChannelException
133        sc.close();
134        try {
135            sc.setOption(TCP_NODELAY, true);
136            throw new RuntimeException("ClosedChannelException not thrown");
137        } catch (ClosedChannelException x) {
138        }
139    }
140}
141