1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/*
* Copyright (c) 2010, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 6213702
* @requires (os.family != "mac") | (os.version == "10.10.5")
* | (os.simpleVersion != "10.8" & os.simpleVersion != "10.9"
* & os.simpleVersion != "10.10")
* @summary OOB data causes a SocketChannel, with OOBINLINE disabled, to be
* selected
*/
import java.net.*;
import java.nio.ByteBuffer;
import java.nio.channels.*;
import java.io.IOException;
public class OutOfBand {
public static void main(String[] args) throws Exception {
ServerSocketChannel ssc = null;
SocketChannel sc = null;
Selector sel = null;
Socket s = null;
try {
// establish loopback connection.
ssc = ServerSocketChannel.open().bind(new InetSocketAddress(0));
s = new Socket(InetAddress.getLocalHost(),
ssc.socket().getLocalPort());
sc = ssc.accept();
sel = Selector.open();
sc.configureBlocking(false);
sc.register(sel, SelectionKey.OP_READ);
// OOB data should be disabled by default
if (sc.socket().getOOBInline())
throw new RuntimeException("SO_OOBINLINE enabled");
test(s, false, 0, 0, sel);
test(s, false, 512, 0, sel);
test(s, false, 0, 512, sel);
test(s, false, 512, 512, sel);
// enable SO_OOBINLINE
sc.socket().setOOBInline(true);
// OOB data should be received
test(s, true, 0, 0, sel);
test(s, true, 512, 0, sel);
test(s, true, 0, 512, sel);
test(s, true, 512, 512, sel);
} finally {
if (sel != null) sel.close();
if (sc != null) sc.close();
if (ssc != null) ssc.close();
if (s != null) sc.close();
}
}
static void test(Socket s, boolean urgentExpected,
int bytesBefore, int bytesAfter,
Selector sel)
throws IOException
{
// send data
int bytesExpected = 0;
if (bytesBefore > 0) {
s.getOutputStream().write(new byte[bytesBefore]);
bytesExpected += bytesBefore;
}
s.sendUrgentData(0xff);
if (urgentExpected)
bytesExpected++;
if (bytesAfter > 0) {
s.getOutputStream().write(new byte[bytesAfter]);
bytesExpected += bytesAfter;
}
// receive data, checking for spurious wakeups and reads
int spuriousWakeups = 0;
int spuriousReads = 0;
int bytesRead = 0;
ByteBuffer bb = ByteBuffer.allocate(100);
for (;;) {
int n = sel.select(2000);
if (n == 0) {
if (bytesRead == bytesExpected) {
System.out.format("Selector wakeups %d\tSpurious reads %d%n",
spuriousWakeups, spuriousReads);
return;
}
if (++spuriousWakeups >= 3)
throw new RuntimeException("Selector appears to be spinning" +
" or data not received");
continue;
}
if (n > 1)
throw new RuntimeException("More than one key selected????");
SelectionKey key = sel.selectedKeys().iterator().next();
bb.clear();
n = ((SocketChannel)key.channel()).read(bb);
if (n == 0) {
if (++spuriousReads >=3)
throw new RuntimeException("Too many spurious reads");
} else {
bytesRead += n;
if (bytesRead > bytesExpected)
throw new RuntimeException("Received more than expected");
}
sel.selectedKeys().clear();
}
}
}
|
