1 /*
2 * Copyright (c) 2007, 2012, 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 4527345 7026376 6633549
26 * @summary Unit test for DatagramChannel's multicast support
27 * @library /test/lib
28 * @build jdk.test.lib.NetworkConfiguration
29 * jdk.test.lib.Utils
30 * jdk.test.lib.Asserts
31 * jdk.test.lib.JDKToolFinder
32 * jdk.test.lib.JDKToolLauncher
33 * jdk.test.lib.Platform
34 * jdk.test.lib.process.*
35 * MulticastSendReceiveTests
36 * @run main MulticastSendReceiveTests
37 * @run main/othervm -Djava.net.preferIPv4Stack=true MulticastSendReceiveTests
38 * @key randomness
39 */
40
41 import java.nio.ByteBuffer;
42 import java.nio.channels.*;
43 import java.net.*;
44 import static java.net.StandardProtocolFamily.*;
45 import java.util.*;
46 import java.io.IOException;
47 import java.util.stream.Collectors;
48
49 import jdk.test.lib.NetworkConfiguration;
50
51 public class MulticastSendReceiveTests {
52
53 static final Random rand = new Random();
54
55 static final ProtocolFamily UNSPEC = new ProtocolFamily() {
56 public String name() {
57 return "UNSPEC";
58 }
59 };
60
61 /**
62 * Send datagram from given local address to given multicast
63 * group.
64 */
65 static int sendDatagram(InetAddress local,
66 NetworkInterface nif,
67 InetAddress group,
68 int port)
69 throws IOException
70 {
71 ProtocolFamily family = (group instanceof Inet6Address) ?
72 StandardProtocolFamily.INET6 : StandardProtocolFamily.INET;
73 DatagramChannel dc = DatagramChannel.open(family)
74 .bind(new InetSocketAddress(local, 0))
75 .setOption(StandardSocketOptions.IP_MULTICAST_IF, nif);
76 int id = rand.nextInt();
77 byte[] msg = Integer.toString(id).getBytes("UTF-8");
78 ByteBuffer buf = ByteBuffer.wrap(msg);
79 System.out.format("Send message from %s -> group %s (id=0x%x)\n",
80 local.getHostAddress(), group.getHostAddress(), id);
81 dc.send(buf, new InetSocketAddress(group, port));
82 dc.close();
83 return id;
84 }
85
86 /**
87 * Wait (with timeout) for datagram.
88 *
89 * @param expectedSender - expected sender address, or
90 * null if no datagram expected
91 * @param id - expected id of datagram
92 */
93 static void receiveDatagram(DatagramChannel dc,
94 InetAddress expectedSender,
95 int id)
96 throws IOException
97 {
98 Selector sel = Selector.open();
99 dc.configureBlocking(false);
100 dc.register(sel, SelectionKey.OP_READ);
101 ByteBuffer buf = ByteBuffer.allocateDirect(100);
102
103 try {
104 for (;;) {
105 System.out.println("Waiting to receive message");
106 sel.select(5*1000);
107 SocketAddress sa = dc.receive(buf);
108
109 // no datagram received
110 if (sa == null) {
111 if (expectedSender != null) {
112 throw new RuntimeException("Expected message not received");
113 }
114 System.out.println("No message received (correct)");
115 return;
116 }
117
118 // datagram received
119
120 InetAddress sender = ((InetSocketAddress)sa).getAddress();
121 buf.flip();
122 byte[] bytes = new byte[buf.remaining()];
123 buf.get(bytes);
124 String s = new String(bytes, "UTF-8");
125 int receivedId = -1;
126 try {
127 receivedId = Integer.parseInt(s);
128 System.out.format("Received message from %s (id=0x%x)\n",
129 sender, receivedId);
130 } catch (NumberFormatException x) {
131 System.out.format("Received message from %s (msg=%s)\n", sender, s);
132 }
133
134 if (expectedSender == null) {
135 if (receivedId == id)
136 throw new RuntimeException("Message not expected");
137 System.out.println("Message ignored (has wrong id)");
138 } else {
139 if (sender.equals(expectedSender)) {
140 System.out.println("Message expected");
141 return;
142 }
143 System.out.println("Message ignored (wrong sender)");
144 }
145
146 sel.selectedKeys().clear();
147 buf.rewind();
148 }
149 } finally {
150 sel.close();
151 }
152 }
153
154
155 /**
156 * Exercise multicast send/receive on given group/interface
157 */
158 static void test(ProtocolFamily family,
159 NetworkInterface nif,
160 InetAddress group,
161 InetAddress source)
162 throws IOException
163 {
164 System.out.format("\nTest DatagramChannel to %s socket\n", family.name());
165 try (DatagramChannel dc = (family == UNSPEC) ?
166 DatagramChannel.open() : DatagramChannel.open(family)) {
167 dc.setOption(StandardSocketOptions.SO_REUSEADDR, true)
168 .bind(new InetSocketAddress(0));
169
170 // join group
171 System.out.format("join %s @ %s\n", group.getHostAddress(),
172 nif.getName());
173 MembershipKey key;
174 try {
175 key = dc.join(group, nif);
176 } catch (IllegalArgumentException iae) {
177 if (family == UNSPEC) {
178 System.out.println("Not supported");
179 return;
180 }
181 throw iae;
182 }
183
184 // send message to group
185 int port = ((InetSocketAddress)dc.getLocalAddress()).getPort();
186 int id = sendDatagram(source, nif, group, port);
187
188 // receive message and check id matches
189 receiveDatagram(dc, source, id);
190
191 // exclude-mode filtering
192
193 try {
194 System.out.format("block %s\n", source.getHostAddress());
195
196 // may throw UOE
197 key.block(source);
198 id = sendDatagram(source, nif, group, port);
199 receiveDatagram(dc, null, id);
200
201 // unblock source, send message, message should be received
202 System.out.format("unblock %s\n", source.getHostAddress());
203 key.unblock(source);
204 id = sendDatagram(source, nif, group, port);
205 receiveDatagram(dc, source, id);
206 } catch (UnsupportedOperationException x) {
207 String os = System.getProperty("os.name");
208 // Exclude-mode filtering supported on these platforms so UOE should never be thrown
209 if (os.equals("SunOS") || os.equals("Linux"))
210 throw x;
211 System.out.println("Exclude-mode filtering not supported!");
212 }
213
214 key.drop();
215
216 // include-mode filtering
217
218 InetAddress bogus = (group instanceof Inet6Address) ?
219 InetAddress.getByName("fe80::1234") :
220 InetAddress.getByName("1.2.3.4");
221 System.out.format("join %s @ %s only-source %s\n", group.getHostAddress(),
222 nif.getName(), bogus.getHostAddress());
223 try {
224 // may throw UOE
225 key = dc.join(group, nif, bogus);
226
227 id = sendDatagram(source, nif, group, port);
228 receiveDatagram(dc, null, id);
229
230 System.out.format("join %s @ %s only-source %s\n", group.getHostAddress(),
231 nif.getName(), source.getHostAddress());
232 key = dc.join(group, nif, source);
233
234 id = sendDatagram(source, nif, group, port);
235 receiveDatagram(dc, source, id);
236 } catch (UnsupportedOperationException x) {
237 String os = System.getProperty("os.name");
238 // Include-mode filtering supported on these platforms so UOE should never be thrown
239 if (os.equals("SunOS") || os.equals("Linux"))
240 throw x;
241 System.out.println("Include-mode filtering not supported!");
242 }
243 }
244 }
245
246 public static void main(String[] args) throws IOException {
247 NetworkConfiguration config = NetworkConfiguration.probe();
248
249 // multicast groups used for the test
250 InetAddress ip4Group = InetAddress.getByName("225.4.5.6");
251 InetAddress ip6Group = InetAddress.getByName("ff02::a");
252 for (NetworkInterface nif: config.ip4MulticastInterfaces()
253 .collect(Collectors.toList())) {
254 InetAddress source = config.ip4Addresses(nif).iterator().next();
255 test(INET, nif, ip4Group, source);
256 test(UNSPEC, nif, ip4Group, source);
257 }
258
259 for (NetworkInterface nif: config.ip6MulticastInterfaces()
260 .collect(Collectors.toList())) {
261 InetAddress source = config.ip6Addresses(nif).iterator().next();
262 test(INET6, nif, ip6Group, source);
263 test(UNSPEC, nif, ip6Group, source);
264 }
265 }
266 }