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 * @build MulticastSendReceiveTests NetworkConfiguration
28 * @run main MulticastSendReceiveTests
29 * @run main/othervm -Djava.net.preferIPv4Stack=true MulticastSendReceiveTests
30 */
31
32 import java.nio.ByteBuffer;
33 import java.nio.channels.*;
34 import java.net.*;
35 import static java.net.StandardProtocolFamily.*;
36 import java.util.*;
37 import java.io.IOException;
38
39 public class MulticastSendReceiveTests {
40
41 static final Random rand = new Random();
42
43 static final ProtocolFamily UNSPEC = new ProtocolFamily() {
44 public String name() {
45 return "UNSPEC";
46 }
47 };
48
49 /**
50 * Send datagram from given local address to given multicast
51 * group.
52 */
53 static int sendDatagram(InetAddress local,
54 NetworkInterface nif,
55 InetAddress group,
56 int port)
57 throws IOException
58 {
59 ProtocolFamily family = (group instanceof Inet6Address) ?
60 StandardProtocolFamily.INET6 : StandardProtocolFamily.INET;
61 DatagramChannel dc = DatagramChannel.open(family)
62 .bind(new InetSocketAddress(local, 0))
63 .setOption(StandardSocketOptions.IP_MULTICAST_IF, nif);
64 int id = rand.nextInt();
65 byte[] msg = Integer.toString(id).getBytes("UTF-8");
66 ByteBuffer buf = ByteBuffer.wrap(msg);
67 System.out.format("Send message from %s -> group %s (id=0x%x)\n",
68 local.getHostAddress(), group.getHostAddress(), id);
69 dc.send(buf, new InetSocketAddress(group, port));
70 dc.close();
71 return id;
72 }
73
74 /**
75 * Wait (with timeout) for datagram.
76 *
77 * @param expectedSender - expected sender address, or
78 * null if no datagram expected
79 * @param id - expected id of datagram
80 */
81 static void receiveDatagram(DatagramChannel dc,
82 InetAddress expectedSender,
83 int id)
84 throws IOException
85 {
86 Selector sel = Selector.open();
87 dc.configureBlocking(false);
88 dc.register(sel, SelectionKey.OP_READ);
89 ByteBuffer buf = ByteBuffer.allocateDirect(100);
90
91 try {
92 for (;;) {
93 System.out.println("Waiting to receive message");
94 sel.select(5*1000);
95 SocketAddress sa = dc.receive(buf);
96
97 // no datagram received
98 if (sa == null) {
99 if (expectedSender != null) {
100 throw new RuntimeException("Expected message not received");
101 }
102 System.out.println("No message received (correct)");
103 return;
104 }
105
106 // datagram received
107
108 InetAddress sender = ((InetSocketAddress)sa).getAddress();
109 buf.flip();
110 byte[] bytes = new byte[buf.remaining()];
111 buf.get(bytes);
112 String s = new String(bytes, "UTF-8");
113 int receivedId = -1;
114 try {
115 receivedId = Integer.parseInt(s);
116 System.out.format("Received message from %s (id=0x%x)\n",
117 sender, receivedId);
118 } catch (NumberFormatException x) {
119 System.out.format("Received message from %s (msg=%s)\n", sender, s);
120 }
121
122 if (expectedSender == null) {
123 if (receivedId == id)
124 throw new RuntimeException("Message not expected");
125 System.out.println("Message ignored (has wrong id)");
126 } else {
127 if (sender.equals(expectedSender)) {
128 System.out.println("Message expected");
129 return;
130 }
131 System.out.println("Message ignored (wrong sender)");
132 }
133
134 sel.selectedKeys().clear();
135 buf.rewind();
136 }
137 } finally {
138 sel.close();
139 }
140 }
141
142
143 /**
144 * Exercise multicast send/receive on given group/interface
145 */
146 static void test(ProtocolFamily family,
147 NetworkInterface nif,
148 InetAddress group,
149 InetAddress source)
150 throws IOException
151 {
152 System.out.format("\nTest DatagramChannel to %s socket\n", family.name());
153 try (DatagramChannel dc = (family == UNSPEC) ?
154 DatagramChannel.open() : DatagramChannel.open(family)) {
155 dc.setOption(StandardSocketOptions.SO_REUSEADDR, true)
156 .bind(new InetSocketAddress(0));
157
158 // join group
159 System.out.format("join %s @ %s\n", group.getHostAddress(),
160 nif.getName());
161 MembershipKey key;
162 try {
163 key = dc.join(group, nif);
164 } catch (IllegalArgumentException iae) {
165 if (family == UNSPEC) {
166 System.out.println("Not supported");
167 return;
168 }
169 throw iae;
170 }
171
172 // send message to group
173 int port = ((InetSocketAddress)dc.getLocalAddress()).getPort();
174 int id = sendDatagram(source, nif, group, port);
175
176 // receive message and check id matches
177 receiveDatagram(dc, source, id);
178
179 // exclude-mode filtering
180
181 try {
182 System.out.format("block %s\n", source.getHostAddress());
183
184 // may throw UOE
185 key.block(source);
186 id = sendDatagram(source, nif, group, port);
187 receiveDatagram(dc, null, id);
188
189 // unblock source, send message, message should be received
190 System.out.format("unblock %s\n", source.getHostAddress());
191 key.unblock(source);
192 id = sendDatagram(source, nif, group, port);
193 receiveDatagram(dc, source, id);
194 } catch (UnsupportedOperationException x) {
195 String os = System.getProperty("os.name");
196 // Exclude-mode filtering supported on these platforms so UOE should never be thrown
197 if (os.equals("SunOS") || os.equals("Linux"))
198 throw x;
199 System.out.println("Exclude-mode filtering not supported!");
200 }
201
202 key.drop();
203
204 // include-mode filtering
205
206 InetAddress bogus = (group instanceof Inet6Address) ?
207 InetAddress.getByName("fe80::1234") :
208 InetAddress.getByName("1.2.3.4");
209 System.out.format("join %s @ %s only-source %s\n", group.getHostAddress(),
210 nif.getName(), bogus.getHostAddress());
211 try {
212 // may throw UOE
213 key = dc.join(group, nif, bogus);
214
215 id = sendDatagram(source, nif, group, port);
216 receiveDatagram(dc, null, id);
217
218 System.out.format("join %s @ %s only-source %s\n", group.getHostAddress(),
219 nif.getName(), source.getHostAddress());
220 key = dc.join(group, nif, source);
221
222 id = sendDatagram(source, nif, group, port);
223 receiveDatagram(dc, source, id);
224 } catch (UnsupportedOperationException x) {
225 String os = System.getProperty("os.name");
226 // Include-mode filtering supported on these platforms so UOE should never be thrown
227 if (os.equals("SunOS") || os.equals("Linux"))
228 throw x;
229 System.out.println("Include-mode filtering not supported!");
230 }
231 }
232 }
233
234 public static void main(String[] args) throws IOException {
235 NetworkConfiguration config = NetworkConfiguration.probe();
236
237 // multicast groups used for the test
238 InetAddress ip4Group = InetAddress.getByName("225.4.5.6");
239 InetAddress ip6Group = InetAddress.getByName("ff02::a");
240
241 for (NetworkInterface nif: config.ip4Interfaces()) {
242 InetAddress source = config.ip4Addresses(nif).iterator().next();
243 test(INET, nif, ip4Group, source);
244 test(UNSPEC, nif, ip4Group, source);
245 }
246
247 for (NetworkInterface nif: config.ip6Interfaces()) {
248 InetAddress source = config.ip6Addresses(nif).iterator().next();
249 test(INET6, nif, ip6Group, source);
250 test(UNSPEC, nif, ip6Group, source);
251 }
252 }
253 }