1 /*
2 * Copyright (c) 2007, 2008, 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
26 * @summary Unit test for DatagramChannel's multicast support
27 * @build MulticastSendReceiveTests NetworkConfiguration
28 * @run main MulticastSendReceiveTests
29 */
30
31 import java.nio.ByteBuffer;
32 import java.nio.channels.*;
33 import java.net.*;
34 import static java.net.StandardProtocolFamily.*;
35 import java.util.*;
36 import java.io.IOException;
37
38 public class MulticastSendReceiveTests {
39
40 static final Random rand = new Random();
41
42 static final ProtocolFamily UNSPEC = new ProtocolFamily() {
43 public String name() {
44 return "UNSPEC";
45 }
46 };
47
48 /**
49 * Send datagram from given local address to given multicast
50 * group.
51 */
52 static int sendDatagram(InetAddress local,
53 NetworkInterface nif,
54 InetAddress group,
55 int port)
56 throws IOException
57 {
58 ProtocolFamily family = (group instanceof Inet6Address) ?
59 StandardProtocolFamily.INET6 : StandardProtocolFamily.INET;
60 DatagramChannel dc = DatagramChannel.open(family)
61 .bind(new InetSocketAddress(local, 0))
62 .setOption(StandardSocketOption.IP_MULTICAST_IF, nif);
63 int id = rand.nextInt();
64 byte[] msg = Integer.toString(id).getBytes("UTF-8");
65 ByteBuffer buf = ByteBuffer.wrap(msg);
66 System.out.format("Send message from %s -> group %s (id=0x%x)\n",
67 local.getHostAddress(), group.getHostAddress(), id);
68 dc.send(buf, new InetSocketAddress(group, port));
69 dc.close();
70 return id;
71 }
72
73 /**
74 * Wait (with timeout) for datagram.
75 *
76 * @param expectedSender - expected sender address, or
77 * null if no datagram expected
78 * @param id - expected id of datagram
79 */
80 static void receiveDatagram(DatagramChannel dc,
81 InetAddress expectedSender,
82 int id)
83 throws IOException
84 {
85 Selector sel = Selector.open();
86 dc.configureBlocking(false);
87 dc.register(sel, SelectionKey.OP_READ);
88 ByteBuffer buf = ByteBuffer.allocateDirect(100);
89
90 try {
91 for (;;) {
92 System.out.println("Waiting to receive message");
93 sel.select(5*1000);
94 SocketAddress sa = dc.receive(buf);
95
96 // no datagram received
97 if (sa == null) {
98 if (expectedSender != null) {
99 throw new RuntimeException("Expected message not recieved");
100 }
101 System.out.println("No message received (correct)");
102 return;
103 }
104
105 // datagram received
106
107 InetAddress sender = ((InetSocketAddress)sa).getAddress();
108 buf.flip();
109 byte[] bytes = new byte[buf.remaining()];
110 buf.get(bytes);
111 int receivedId = Integer.parseInt(new String(bytes));
112
113 System.out.format("Received message from %s (id=0x%x)\n",
114 sender, receivedId);
115
116 if (expectedSender == null) {
117 if (receivedId == id)
118 throw new RuntimeException("Message not expected");
119 System.out.println("Message ignored (has wrong id)");
120 } else {
121 if (sender.equals(expectedSender)) {
122 System.out.println("Message expected");
123 return;
124 }
125 System.out.println("Message ignored (wrong sender)");
126 }
127
128 sel.selectedKeys().clear();
129 buf.rewind();
130 }
131 } finally {
132 sel.close();
133 }
134 }
135
136
137 /**
138 * Exercise multicast send/receive on given group/interface
139 */
140 static void test(ProtocolFamily family,
141 NetworkInterface nif,
142 InetAddress group,
143 InetAddress source)
144 throws IOException
145 {
146 System.out.format("\nTest DatagramChannel to %s socket\n", family.name());
147 try (DatagramChannel dc = (family == UNSPEC) ?
148 DatagramChannel.open() : DatagramChannel.open(family)) {
149 dc.setOption(StandardSocketOption.SO_REUSEADDR, true)
150 .bind(new InetSocketAddress(0));
151
152 // join group
153 System.out.format("join %s @ %s\n", group.getHostAddress(),
154 nif.getName());
155 MembershipKey key;
156 try {
157 key = dc.join(group, nif);
158 } catch (IllegalArgumentException iae) {
159 if (family == UNSPEC) {
160 System.out.println("Not supported");
161 return;
162 }
163 throw iae;
164 }
165
166 // send message to group
167 int port = ((InetSocketAddress)dc.getLocalAddress()).getPort();
168 int id = sendDatagram(source, nif, group, port);
169
170 // receive message and check id matches
171 receiveDatagram(dc, source, id);
172
173 // exclude-mode filtering
174
175 try {
176 System.out.format("block %s\n", source.getHostAddress());
177
178 // may throw UOE
179 key.block(source);
180 id = sendDatagram(source, nif, group, port);
181 receiveDatagram(dc, null, id);
182
183 // unblock source, send message, message should be received
184 System.out.format("unblock %s\n", source.getHostAddress());
185 key.unblock(source);
186 id = sendDatagram(source, nif, group, port);
187 receiveDatagram(dc, source, id);
188 } catch (UnsupportedOperationException x) {
189 System.out.println("Exclude-mode filtering not supported!");
190 }
191
192 key.drop();
193
194 // include-mode filtering
195
196 InetAddress bogus = (group instanceof Inet6Address) ?
197 InetAddress.getByName("fe80::1234") :
198 InetAddress.getByName("1.2.3.4");
199 System.out.format("join %s @ %s only-source %s\n", group.getHostAddress(),
200 nif.getName(), bogus.getHostAddress());
201 try {
202 // may throw UOE
203 key = dc.join(group, nif, bogus);
204
205 id = sendDatagram(source, nif, group, port);
206 receiveDatagram(dc, null, id);
207
208 System.out.format("join %s @ %s only-source %s\n", group.getHostAddress(),
209 nif.getName(), source.getHostAddress());
210 key = dc.join(group, nif, source);
211
212 id = sendDatagram(source, nif, group, port);
213 receiveDatagram(dc, source, id);
214 } catch (UnsupportedOperationException x) {
215 System.out.println("Include-mode filtering not supported!");
216 }
217 }
218 }
219
220 public static void main(String[] args) throws IOException {
221 NetworkConfiguration config = NetworkConfiguration.probe();
222
223 // multicast groups used for the test
224 InetAddress ip4Group = InetAddress.getByName("225.4.5.6");
225 InetAddress ip6Group = InetAddress.getByName("ff02::a");
226
227 for (NetworkInterface nif: config.ip4Interfaces()) {
228 InetAddress source = config.ip4Addresses(nif).iterator().next();
229 test(INET, nif, ip4Group, source);
230 test(UNSPEC, nif, ip4Group, source);
231 }
232
233 for (NetworkInterface nif: config.ip6Interfaces()) {
234 InetAddress source = config.ip6Addresses(nif).iterator().next();
235 test(INET6, nif, ip6Group, source);
236 test(UNSPEC, nif, ip6Group, source);
237 }
238 }
239 }