1/* 2 * Copyright (c) 2010, 2011, 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 6935563 7044870 26 * @summary Test that Selector does not select an unconnected DatagramChannel when 27 * ICMP port unreachable received 28 */ 29 30import java.nio.ByteBuffer; 31import java.nio.channels.*; 32import java.net.*; 33import java.io.IOException; 34 35public class SelectWhenRefused { 36 37 public static void main(String[] args) throws IOException { 38 DatagramChannel dc1 = DatagramChannel.open().bind(new InetSocketAddress(0)); 39 int port = dc1.socket().getLocalPort(); 40 41 // datagram sent to this address should be refused 42 SocketAddress refuser = new InetSocketAddress(InetAddress.getLocalHost(), port); 43 44 DatagramChannel dc = DatagramChannel.open().bind(new InetSocketAddress(0)); 45 dc1.close(); 46 47 Selector sel = Selector.open(); 48 try { 49 dc.configureBlocking(false); 50 dc.register(sel, SelectionKey.OP_READ); 51 52 /* Test 1: not connected so ICMP port unreachable should not be received */ 53 sendDatagram(dc, refuser); 54 int n = sel.select(2000); 55 if (n > 0) { 56 sel.selectedKeys().clear(); 57 // BindException will be thrown if another service is using 58 // our expected refuser port, cannot run just exit. 59 DatagramChannel.open().bind(refuser).close(); 60 throw new RuntimeException("Unexpected wakeup"); 61 } 62 63 /* Test 2: connected so ICMP port unreachable may be received */ 64 dc.connect(refuser); 65 try { 66 sendDatagram(dc, refuser); 67 n = sel.select(2000); 68 if (n > 0) { 69 sel.selectedKeys().clear(); 70 try { 71 n = dc.read(ByteBuffer.allocate(100)); 72 throw new RuntimeException("Unexpected datagram received"); 73 } catch (PortUnreachableException pue) { 74 // expected 75 } 76 } 77 } finally { 78 dc.disconnect(); 79 } 80 81 /* Test 3: not connected so ICMP port unreachable should not be received */ 82 sendDatagram(dc, refuser); 83 n = sel.select(2000); 84 if (n > 0) { 85 throw new RuntimeException("Unexpected wakeup after disconnect"); 86 } 87 88 } catch(BindException e) { 89 // Do nothing, some other test has used this port 90 } finally { 91 sel.close(); 92 dc.close(); 93 } 94 } 95 96 static void sendDatagram(DatagramChannel dc, SocketAddress remote) 97 throws IOException 98 { 99 ByteBuffer bb = ByteBuffer.wrap("Greetings!".getBytes()); 100 dc.send(bb, remote); 101 } 102} 103