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 36import java.nio.ByteBuffer; 37import java.nio.channels.*; 38import java.net.*; 39import static java.net.StandardProtocolFamily.*; 40import java.util.*; 41import java.io.IOException; 42import java.util.stream.Collectors; 43 44import jdk.test.lib.NetworkConfiguration; 45 46public 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} 262