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