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