1 /*
2 * Copyright (c) 2013, 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 8014377
26 * @summary Test for interference when two sockets are bound to the same
27 * port but joined to different multicast groups
28 * @library /test/lib
29 * @build jdk.test.lib.NetworkConfiguration
30 * jdk.test.lib.Utils
31 * jdk.test.lib.Asserts
32 * jdk.test.lib.JDKToolFinder
33 * jdk.test.lib.JDKToolLauncher
34 * jdk.test.lib.Platform
35 * jdk.test.lib.process.*
36 * Promiscuous
37 * @run main Promiscuous
38 * @run main/othervm -Djava.net.preferIPv4Stack=true Promiscuous
39 * @key randomness
40 */
41
42 import java.nio.ByteBuffer;
43 import java.nio.channels.*;
44 import java.net.*;
45 import static java.net.StandardProtocolFamily.*;
46 import java.util.*;
47 import java.io.IOException;
48 import java.util.stream.Collectors;
49
50 import jdk.test.lib.NetworkConfiguration;
51
52 public class Promiscuous {
53
54 static final Random rand = new Random();
55
56 static final ProtocolFamily UNSPEC = new ProtocolFamily() {
57 public String name() {
58 return "UNSPEC";
59 }
60 };
61
62 /**
63 * Sends a datagram to the given multicast group
64 */
65 static int sendDatagram(NetworkInterface nif,
66 InetAddress group,
67 int port)
68 throws IOException
69 {
70 ProtocolFamily family = (group instanceof Inet6Address) ?
71 StandardProtocolFamily.INET6 : StandardProtocolFamily.INET;
72 DatagramChannel dc = DatagramChannel.open(family)
73 .setOption(StandardSocketOptions.IP_MULTICAST_IF, nif);
74 int id = rand.nextInt();
75 byte[] msg = Integer.toString(id).getBytes("UTF-8");
76 ByteBuffer buf = ByteBuffer.wrap(msg);
77 System.out.format("Send message -> group %s (id=0x%x)\n",
78 group.getHostAddress(), id);
79 dc.send(buf, new InetSocketAddress(group, port));
80 dc.close();
81 return id;
82 }
83
84 /**
85 * Wait (with timeout) for datagram. The {@code datagramExepcted}
86 * parameter indicates whether a datagram is expected, and if
87 * {@true} then {@code id} is the identifier in the payload.
88 */
89 static void receiveDatagram(DatagramChannel dc,
90 String name,
91 boolean datagramExepcted,
92 int id)
93 throws IOException
94 {
95 System.out.println("Checking if received by " + name);
96
97 Selector sel = Selector.open();
98 dc.configureBlocking(false);
99 dc.register(sel, SelectionKey.OP_READ);
100 ByteBuffer buf = ByteBuffer.allocateDirect(100);
101
102 try {
103 for (;;) {
104 System.out.println("Waiting to receive message");
105 sel.select(5*1000);
106 SocketAddress sa = dc.receive(buf);
107
108 // no datagram received
109 if (sa == null) {
110 if (datagramExepcted) {
111 throw new RuntimeException("Expected message not received");
112 }
113 System.out.println("No message received (correct)");
114 return;
115 }
116
117 // datagram received
118
119 InetAddress sender = ((InetSocketAddress)sa).getAddress();
120 buf.flip();
121 byte[] bytes = new byte[buf.remaining()];
122 buf.get(bytes);
123 String s = new String(bytes, "UTF-8");
124 int receivedId = -1;
125 try {
126 receivedId = Integer.parseInt(s);
127 System.out.format("Received message from %s (id=0x%x)\n",
128 sender, receivedId);
129 } catch (NumberFormatException x) {
130 System.out.format("Received message from %s (msg=%s)\n", sender, s);
131 }
132
133 if (!datagramExepcted) {
134 if (receivedId == id)
135 throw new RuntimeException("Message not expected");
136 System.out.println("Message ignored (has wrong id)");
137 } else {
138 if (receivedId == id) {
139 System.out.println("Message expected");
140 return;
141 }
142 System.out.println("Message ignored (wrong sender)");
143 }
144
145 sel.selectedKeys().clear();
146 buf.rewind();
147 }
148 } finally {
149 sel.close();
150 }
151 }
152
153 static void test(ProtocolFamily family,
154 NetworkInterface nif,
155 InetAddress group1,
156 InetAddress group2)
157 throws IOException
158 {
159
160 System.out.format("%nTest family=%s%n", family.name());
161
162 DatagramChannel dc1 = (family == UNSPEC) ?
163 DatagramChannel.open() : DatagramChannel.open(family);
164 DatagramChannel dc2 = (family == UNSPEC) ?
165 DatagramChannel.open() : DatagramChannel.open(family);
166
167 try {
168 dc1.setOption(StandardSocketOptions.SO_REUSEADDR, true);
169 dc2.setOption(StandardSocketOptions.SO_REUSEADDR, true);
170
171 dc1.bind(new InetSocketAddress(0));
172 int port = dc1.socket().getLocalPort();
173 dc2.bind(new InetSocketAddress(port));
174
175 System.out.format("dc1 joining [%s]:%d @ %s\n",
176 group1.getHostAddress(), port, nif.getName());
177 System.out.format("dc2 joining [%s]:%d @ %s\n",
178 group2.getHostAddress(), port, nif.getName());
179
180 dc1.join(group1, nif);
181 dc2.join(group2, nif);
182
183 int id = sendDatagram(nif, group1, port);
184
185 receiveDatagram(dc1, "dc1", true, id);
186 receiveDatagram(dc2, "dc2", false, id);
187
188 id = sendDatagram(nif, group2, port);
189
190 receiveDatagram(dc1, "dc1", false, id);
191 receiveDatagram(dc2, "dc2", true, id);
192
193 } finally {
194 dc1.close();
195 dc2.close();
196 }
197 }
198
199 public static void main(String[] args) throws IOException {
200 String os = System.getProperty("os.name");
201
202 // Requires IP_MULTICAST_ALL on Linux (new since 2.6.31) so skip
203 // on older kernels. Note that we skip on <= version 3 to keep the
204 // parsing simple
205 if (os.equals("Linux")) {
206 String osversion = System.getProperty("os.version");
207 String[] vers = osversion.split("\\.", 0);
208 int major = Integer.parseInt(vers[0]);
209 if (major < 3) {
210 System.out.format("Kernel version is %s, test skipped%n", osversion);
211 return;
212 }
213 }
214
215 // get local network configuration to use
216 NetworkConfiguration config = NetworkConfiguration.probe();
217
218 // multicast groups used for the test
219 InetAddress ip4Group1 = InetAddress.getByName("225.4.5.6");
220 InetAddress ip4Group2 = InetAddress.getByName("225.4.6.6");
221
222 for (NetworkInterface nif: config.ip4MulticastInterfaces()
223 .collect(Collectors.toList())) {
224 InetAddress source = config.ip4Addresses(nif).iterator().next();
225 test(INET, nif, ip4Group1, ip4Group2);
226
227 // Solaris and Linux allow IPv6 sockets join IPv4 multicast groups
228 if (os.equals("SunOS") || os.equals("Linux"))
229 test(UNSPEC, nif, ip4Group1, ip4Group2);
230 }
231 }
232 }