SocketOptionTests.java revision 6073:cea72c2bf071 
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.
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 4640544
26 * @summary Unit test to check SocketChannel setOption/getOption/options
27 *          methods.
28 */
29
30import java.nio.*;
31import java.nio.channels.*;
32import java.net.*;
33import java.io.IOException;
34import java.util.*;
35import static java.net.StandardSocketOptions.*;
36
37public class SocketOptionTests {
38
39    static void checkOption(SocketChannel sc, SocketOption name, Object expectedValue)
40        throws IOException
41    {
42        Object value = sc.getOption(name);
43        if (!value.equals(expectedValue))
44            throw new RuntimeException("value not as expected");
45    }
46
47    public static void main(String[] args) throws IOException {
48        SocketChannel sc = SocketChannel.open();
49
50        // check supported options
51        Set<SocketOption<?>> options = sc.supportedOptions();
52        List<? extends SocketOption> expected = Arrays.asList(SO_SNDBUF, SO_RCVBUF,
53            SO_KEEPALIVE, SO_REUSEADDR, SO_LINGER, TCP_NODELAY);
54        for (SocketOption opt: expected) {
55            if (!options.contains(opt))
56                throw new RuntimeException(opt.name() + " should be supported");
57        }
58
59        // check specified defaults
60        int linger = sc.<Integer>getOption(SO_LINGER);
61        if (linger >= 0)
62            throw new RuntimeException("initial value of SO_LINGER should be < 0");
63        checkOption(sc, SO_KEEPALIVE, false);
64        checkOption(sc, TCP_NODELAY, false);
65
66        // allowed to change when not bound
67        sc.setOption(SO_KEEPALIVE, true);
68        checkOption(sc, SO_KEEPALIVE, true);
69        sc.setOption(SO_KEEPALIVE, false);
70        checkOption(sc, SO_KEEPALIVE, false);
71        sc.setOption(SO_SNDBUF, 128*1024);      // can't check
72        sc.setOption(SO_RCVBUF, 256*1024);      // can't check
73        int before, after;
74        before = sc.getOption(SO_SNDBUF);
75        after = sc.setOption(SO_SNDBUF, Integer.MAX_VALUE).getOption(SO_SNDBUF);
76        if (after < before)
77            throw new RuntimeException("setOption caused SO_SNDBUF to decrease");
78        before = sc.getOption(SO_RCVBUF);
79        after = sc.setOption(SO_RCVBUF, Integer.MAX_VALUE).getOption(SO_RCVBUF);
80        if (after < before)
81            throw new RuntimeException("setOption caused SO_RCVBUF to decrease");
82        sc.setOption(SO_REUSEADDR, true);
83        checkOption(sc, SO_REUSEADDR, true);
84        sc.setOption(SO_REUSEADDR, false);
85        checkOption(sc, SO_REUSEADDR, false);
86        sc.setOption(SO_LINGER, 10);
87        linger = sc.<Integer>getOption(SO_LINGER);
88        if (linger < 1)
89            throw new RuntimeException("expected linger to be enabled");
90        sc.setOption(SO_LINGER, -1);
91        linger = sc.<Integer>getOption(SO_LINGER);
92        if (linger >= 0)
93            throw new RuntimeException("expected linger to be disabled");
94        sc.setOption(TCP_NODELAY, true);
95        checkOption(sc, TCP_NODELAY, true);
96        sc.setOption(TCP_NODELAY, false);       // can't check
97
98        // bind socket
99        sc.bind(new InetSocketAddress(0));
100
101        // allow to change when bound
102        sc.setOption(SO_KEEPALIVE, true);
103        checkOption(sc, SO_KEEPALIVE, true);
104        sc.setOption(SO_KEEPALIVE, false);
105        checkOption(sc, SO_KEEPALIVE, false);
106
107        sc.setOption(SO_LINGER, 10);
108        linger = sc.<Integer>getOption(SO_LINGER);
109        if (linger < 1)
110            throw new RuntimeException("expected linger to be enabled");
111        sc.setOption(SO_LINGER, -1);
112        linger = sc.<Integer>getOption(SO_LINGER);
113        if (linger >= 0)
114            throw new RuntimeException("expected linger to be disabled");
115        sc.setOption(TCP_NODELAY, true);        // can't check
116        sc.setOption(TCP_NODELAY, false);       // can't check
117
118        // NullPointerException
119        try {
120            sc.setOption(null, "value");
121            throw new RuntimeException("NullPointerException not thrown");
122        } catch (NullPointerException x) {
123        }
124        try {
125            sc.getOption(null);
126            throw new RuntimeException("NullPointerException not thrown");
127        } catch (NullPointerException x) {
128        }
129
130        // ClosedChannelException
131        sc.close();
132        try {
133            sc.setOption(TCP_NODELAY, true);
134            throw new RuntimeException("ClosedChannelException not thrown");
135        } catch (ClosedChannelException x) {
136        }
137    }
138}
139