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
136
137
|
/*
* Copyright (c) 2001, 2002, 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 4686717
* @summary Test MulticastSocket.setLoopbackMode
* @library /test/lib
* @build jdk.test.lib.NetworkConfiguration
* jdk.test.lib.Platform
* @run main/othervm SetLoopbackMode
*/
import java.net.*;
import java.io.IOException;
import java.util.Enumeration;
import jdk.test.lib.NetworkConfiguration;
public class SetLoopbackMode {
static final boolean FAILED = true;
static final boolean PASSED = false;
static boolean test(MulticastSocket mc, InetAddress grp) throws IOException {
boolean disabled = mc.getLoopbackMode();
if (disabled) {
System.out.println("Loopback mode is disabled.");
} else {
System.out.println("Loopback mode is enabled.");
}
byte b[] = "hello".getBytes();
DatagramPacket p = new DatagramPacket(b, b.length, grp,
mc.getLocalPort());
mc.send(p);
boolean gotPacket = false;
mc.setSoTimeout(1000);
try {
b = new byte[16];
p = new DatagramPacket(b, b.length);
mc.receive(p);
gotPacket = true;
/* purge any additional copies of the packet */
for (;;) {
mc.receive(p);
}
} catch (SocketTimeoutException x) {
}
if (gotPacket && disabled) {
System.out.println("Packet received (unexpected as loopback is disabled)");
return FAILED;
}
if (!gotPacket && !disabled) {
System.out.println
("Packet not received (packet excepted as loopback is enabled)");
return FAILED;
}
if (gotPacket && !disabled) {
System.out.println("Packet received - correct.");
} else {
System.out.println("Packet not received - correct.");
}
return PASSED;
}
private static boolean canUseIPv6(NetworkConfiguration nc) {
return nc.ip6MulticastInterfaces().toArray().length > 0;
}
public static void main (String args[]) throws Exception {
int failures = 0;
NetworkConfiguration nc = NetworkConfiguration.probe();
MulticastSocket mc = new MulticastSocket();
InetAddress grp = InetAddress.getByName("224.80.80.80");
/*
* If IPv6 is available then use IPv6 multicast group - needed
* to workaround Linux IPv6 bug whereby !IPV6_MULTICAST_LOOP
* doesn't prevent loopback of IPv4 multicast packets.
*/
if (canUseIPv6(nc)) {
grp = InetAddress.getByName("ff01::1");
}
//mc.setNetworkInterface(NetworkInterface.getByInetAddress(lb));
System.out.println("\nTest will use multicast group: " + grp);
mc.joinGroup(grp);
System.out.println("\n******************\n");
mc.setLoopbackMode(true);
if (test(mc, grp) == FAILED) failures++;
System.out.println("\n******************\n");
mc.setLoopbackMode(false);
if (test(mc, grp) == FAILED) failures++;
System.out.println("\n******************\n");
if (failures > 0) {
throw new RuntimeException("Test failed");
}
}
}
|
