1 /* 2 * Copyright (c) 2013, 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 8014377 26 * @summary Test for interference when two sockets are bound to the same 27 * port but joined to different multicast groups 28 * @build Promiscuous NetworkConfiguration 29 * @run main Promiscuous 30 * @run main/othervm -Djava.net.preferIPv4Stack=true Promiscuous 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 41 public class Promiscuous { 42 43 static final Random rand = new Random(); 44 45 static final ProtocolFamily UNSPEC = new ProtocolFamily() { 46 public String name() { 47 return "UNSPEC"; 48 } 49 }; 50 51 /** 52 * Sends a datagram to the given multicast group 53 */ 54 static int sendDatagram(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 .setOption(StandardSocketOptions.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 -> group %s (id=0x%x)\n", 67 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. The {@code datagramExepcted} 75 * parameter indicates whether a datagram is expected, and if 76 * {@true} then {@code id} is the identifier in the payload. 77 */ 78 static void receiveDatagram(DatagramChannel dc, 79 String name, 80 boolean datagramExepcted, 81 int id) 82 throws IOException 83 { 84 System.out.println("Checking if received by " + name); 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 (datagramExepcted) { 100 throw new RuntimeException("Expected message not recieved"); 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 int receivedId = Integer.parseInt(new String(bytes)); 113 114 System.out.format("Received message from %s (id=0x%x)\n", 115 sender, receivedId); 116 117 if (!datagramExepcted) { 118 if (receivedId == id) 119 throw new RuntimeException("Message not expected"); 120 System.out.println("Message ignored (has wrong id)"); 121 } else { 122 if (receivedId == id) { 123 System.out.println("Message expected"); 124 return; 125 } 126 System.out.println("Message ignored (wrong sender)"); 127 } 128 129 sel.selectedKeys().clear(); 130 buf.rewind(); 131 } 132 } finally { 133 sel.close(); 134 } 135 } 136 137 static void test(ProtocolFamily family, 138 NetworkInterface nif, 139 InetAddress group1, 140 InetAddress group2) 141 throws IOException 142 { 143 144 System.out.format("%nTest family=%s%n", family.name()); 145 146 DatagramChannel dc1 = (family == UNSPEC) ? 147 DatagramChannel.open() : DatagramChannel.open(family); 148 DatagramChannel dc2 = (family == UNSPEC) ? 149 DatagramChannel.open() : DatagramChannel.open(family); 150 151 try { 152 dc1.setOption(StandardSocketOptions.SO_REUSEADDR, true); 153 dc2.setOption(StandardSocketOptions.SO_REUSEADDR, true); 154 155 dc1.bind(new InetSocketAddress(0)); 156 int port = dc1.socket().getLocalPort(); 157 dc2.bind(new InetSocketAddress(port)); 158 159 System.out.format("dc1 joining [%s]:%d @ %s\n", 160 group1.getHostAddress(), port, nif.getName()); 161 System.out.format("dc2 joining [%s]:%d @ %s\n", 162 group2.getHostAddress(), port, nif.getName()); 163 164 dc1.join(group1, nif); 165 dc2.join(group2, nif); 166 167 int id = sendDatagram(nif, group1, port); 168 169 receiveDatagram(dc1, "dc1", true, id); 170 receiveDatagram(dc2, "dc2", false, id); 171 172 id = sendDatagram(nif, group2, port); 173 174 receiveDatagram(dc1, "dc1", false, id); 175 receiveDatagram(dc2, "dc2", true, id); 176 177 } finally { 178 dc1.close(); 179 dc2.close(); 180 } 181 } 182 183 public static void main(String[] args) throws IOException { 184 String os = System.getProperty("os.name"); 185 186 // Requires IP_MULTICAST_ALL on Linux (new since 2.6.31) so skip 187 // on older kernels. Note that we skip on <= version 3 to keep the 188 // parsing simple 189 if (os.equals("Linux")) { 190 String osversion = System.getProperty("os.version"); 191 String[] vers = osversion.split("\\.", 0); 192 int major = Integer.parseInt(vers[0]); 193 if (major < 3) { 194 System.out.format("Kernel version is %s, test skipped%n", osversion); 195 return; 196 } 197 } 198 199 // get local network configuration to use 200 NetworkConfiguration config = NetworkConfiguration.probe(); 201 202 // multicast groups used for the test 203 InetAddress ip4Group1 = InetAddress.getByName("225.4.5.6"); 204 InetAddress ip4Group2 = InetAddress.getByName("225.4.6.6"); 205 206 for (NetworkInterface nif: config.ip4Interfaces()) { 207 InetAddress source = config.ip4Addresses(nif).iterator().next(); 208 test(INET, nif, ip4Group1, ip4Group2); 209 210 // Solaris and Linux allow IPv6 sockets join IPv4 multicast groups 211 if (os.equals("SunOS") || os.equals("Linux")) 212 test(UNSPEC, nif, ip4Group1, ip4Group2); 213 } 214 } 215 }