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 * @key randomness
31 */
32
33 import java.nio.ByteBuffer;
34 import java.nio.channels.*;
35 import java.net.*;
36 import static java.net.StandardProtocolFamily.*;
37 import java.util.*;
38 import java.io.IOException;
39
40 public class MulticastSendReceiveTests {
41
42 static final Random rand = new Random();
43
44 static final ProtocolFamily UNSPEC = new ProtocolFamily() {
45 public String name() {
46 return "UNSPEC";
47 }
48 };
49
50 /**
51 * Send datagram from given local address to given multicast
52 * group.
53 */
54 static int sendDatagram(InetAddress local,
55 NetworkInterface nif,
56 InetAddress group,
57 int port)
58 throws IOException
59 {
60 ProtocolFamily family = (group instanceof Inet6Address) ?
61 StandardProtocolFamily.INET6 : StandardProtocolFamily.INET;
62 DatagramChannel dc = DatagramChannel.open(family)
63 .bind(new InetSocketAddress(local, 0))
64 .setOption(StandardSocketOptions.IP_MULTICAST_IF, nif);
65 int id = rand.nextInt();
66 byte[] msg = Integer.toString(id).getBytes("UTF-8");
67 ByteBuffer buf = ByteBuffer.wrap(msg);
68 System.out.format("Send message from %s -> group %s (id=0x%x)\n",
69 local.getHostAddress(), group.getHostAddress(), id);
70 dc.send(buf, new InetSocketAddress(group, port));
71 dc.close();
72 return id;
73 }
74
75 /**
76 * Wait (with timeout) for datagram.
77 *
78 * @param expectedSender - expected sender address, or
79 * null if no datagram expected
80 * @param id - expected id of datagram
81 */
82 static void receiveDatagram(DatagramChannel dc,
83 InetAddress expectedSender,
84 int id)
85 throws IOException
86 {
87 Selector sel = Selector.open();
88 dc.configureBlocking(false);
89 dc.register(sel, SelectionKey.OP_READ);
90 ByteBuffer buf = ByteBuffer.allocateDirect(100);
91
92 try {
93 for (;;) {
94 System.out.println("Waiting to receive message");
95 sel.select(5*1000);
96 SocketAddress sa = dc.receive(buf);
97
98 // no datagram received
99 if (sa == null) {
100 if (expectedSender != null) {
101 throw new RuntimeException("Expected message not received");
102 }
103 System.out.println("No message received (correct)");
104 return;
105 }
106
107 // datagram received
108
109 InetAddress sender = ((InetSocketAddress)sa).getAddress();
110 buf.flip();
111 byte[] bytes = new byte[buf.remaining()];
112 buf.get(bytes);
113 String s = new String(bytes, "UTF-8");
114 int receivedId = -1;
115 try {
116 receivedId = Integer.parseInt(s);
117 System.out.format("Received message from %s (id=0x%x)\n",
118 sender, receivedId);
119 } catch (NumberFormatException x) {
120 System.out.format("Received message from %s (msg=%s)\n", sender, s);
121 }
122
123 if (expectedSender == null) {
124 if (receivedId == id)
125 throw new RuntimeException("Message not expected");
126 System.out.println("Message ignored (has wrong id)");
127 } else {
128 if (sender.equals(expectedSender)) {
129 System.out.println("Message expected");
130 return;
131 }
132 System.out.println("Message ignored (wrong sender)");
133 }
134
135 sel.selectedKeys().clear();
136 buf.rewind();
137 }
138 } finally {
139 sel.close();
140 }
141 }
142
143
144 /**
145 * Exercise multicast send/receive on given group/interface
146 */
147 static void test(ProtocolFamily family,
148 NetworkInterface nif,
149 InetAddress group,
150 InetAddress source)
151 throws IOException
152 {
153 System.out.format("\nTest DatagramChannel to %s socket\n", family.name());
154 try (DatagramChannel dc = (family == UNSPEC) ?
155 DatagramChannel.open() : DatagramChannel.open(family)) {
156 dc.setOption(StandardSocketOptions.SO_REUSEADDR, true)
157 .bind(new InetSocketAddress(0));
158
159 // join group
160 System.out.format("join %s @ %s\n", group.getHostAddress(),
161 nif.getName());
162 MembershipKey key;
163 try {
164 key = dc.join(group, nif);
165 } catch (IllegalArgumentException iae) {
166 if (family == UNSPEC) {
167 System.out.println("Not supported");
168 return;
169 }
170 throw iae;
171 }
172
173 // send message to group
174 int port = ((InetSocketAddress)dc.getLocalAddress()).getPort();
175 int id = sendDatagram(source, nif, group, port);
176
177 // receive message and check id matches
178 receiveDatagram(dc, source, id);
179
180 // exclude-mode filtering
181
182 try {
183 System.out.format("block %s\n", source.getHostAddress());
184
185 // may throw UOE
186 key.block(source);
187 id = sendDatagram(source, nif, group, port);
188 receiveDatagram(dc, null, id);
189
190 // unblock source, send message, message should be received
191 System.out.format("unblock %s\n", source.getHostAddress());
192 key.unblock(source);
193 id = sendDatagram(source, nif, group, port);
194 receiveDatagram(dc, source, id);
195 } catch (UnsupportedOperationException x) {
196 String os = System.getProperty("os.name");
197 // Exclude-mode filtering supported on these platforms so UOE should never be thrown
198 if (os.equals("SunOS") || os.equals("Linux"))
199 throw x;
200 System.out.println("Exclude-mode filtering not supported!");
201 }
202
203 key.drop();
204
205 // include-mode filtering
206
207 InetAddress bogus = (group instanceof Inet6Address) ?
208 InetAddress.getByName("fe80::1234") :
209 InetAddress.getByName("1.2.3.4");
210 System.out.format("join %s @ %s only-source %s\n", group.getHostAddress(),
211 nif.getName(), bogus.getHostAddress());
212 try {
213 // may throw UOE
214 key = dc.join(group, nif, bogus);
215
216 id = sendDatagram(source, nif, group, port);
217 receiveDatagram(dc, null, id);
218
219 System.out.format("join %s @ %s only-source %s\n", group.getHostAddress(),
220 nif.getName(), source.getHostAddress());
221 key = dc.join(group, nif, source);
222
223 id = sendDatagram(source, nif, group, port);
224 receiveDatagram(dc, source, id);
225 } catch (UnsupportedOperationException x) {
226 String os = System.getProperty("os.name");
227 // Include-mode filtering supported on these platforms so UOE should never be thrown
228 if (os.equals("SunOS") || os.equals("Linux"))
229 throw x;
230 System.out.println("Include-mode filtering not supported!");
231 }
232 }
233 }
234
235 public static void main(String[] args) throws IOException {
236 NetworkConfiguration config = NetworkConfiguration.probe();
237
238 // multicast groups used for the test
239 InetAddress ip4Group = InetAddress.getByName("225.4.5.6");
240 InetAddress ip6Group = InetAddress.getByName("ff02::a");
241
242 for (NetworkInterface nif: config.ip4Interfaces()) {
243 InetAddress source = config.ip4Addresses(nif).iterator().next();
244 test(INET, nif, ip4Group, source);
245 test(UNSPEC, nif, ip4Group, source);
246 }
247
248 for (NetworkInterface nif: config.ip6Interfaces()) {
249 InetAddress source = config.ip6Addresses(nif).iterator().next();
250 test(INET6, nif, ip6Group, source);
251 test(UNSPEC, nif, ip6Group, source);
252 }
253 }
254 }