| /* |
| * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 4630914 |
| * @summary Should only be one PUE even if multiple ICMPs were received |
| */ |
| import java.net.*; |
| import java.nio.*; |
| import java.nio.channels.*; |
| |
| public class ThereCanBeOnlyOne { |
| |
| static void doTest(InetAddress ia, boolean testSend) throws Exception { |
| DatagramChannel dc1 = DatagramChannel.open(); |
| dc1.socket().bind((SocketAddress)null); |
| int port = dc1.socket().getLocalPort(); |
| InetSocketAddress isa = new InetSocketAddress(ia, port); |
| dc1.connect(isa); |
| |
| ByteBuffer bb = ByteBuffer.allocateDirect(512); |
| bb.put("hello".getBytes()); |
| bb.flip(); |
| |
| /* |
| * Send a bunch of packets to the destination |
| */ |
| int outstanding = 0; |
| for (int i=0; i<20; i++) { |
| try { |
| bb.rewind(); |
| dc1.write(bb); |
| outstanding++; |
| } catch (PortUnreachableException e) { |
| /* PUE throw => assume none outstanding now */ |
| outstanding = 0; |
| } |
| if (outstanding > 1) { |
| break; |
| } |
| } |
| if (outstanding < 1) { |
| System.err.println("Insufficient exceptions outstanding - Test Skipped (Passed)."); |
| dc1.close(); |
| return; |
| } |
| |
| /* |
| * Give time for ICMP port unreachables to return |
| */ |
| Thread.currentThread().sleep(5000); |
| |
| /* |
| * The next send or receive should cause a PUE to be thrown |
| */ |
| boolean gotPUE = false; |
| boolean gotTimeout = false; |
| dc1.configureBlocking(false); |
| |
| try { |
| if (testSend) { |
| bb.rewind(); |
| dc1.write(bb); |
| } else { |
| bb.clear(); |
| dc1.receive(bb); |
| } |
| } catch (PortUnreachableException pue) { |
| System.err.println("Got one PUE..."); |
| gotPUE = true; |
| } |
| |
| /* |
| * The next receive should not get another PUE |
| */ |
| if (gotPUE) { |
| try { |
| dc1.receive(bb); |
| } catch (PortUnreachableException pue) { |
| throw new Exception("PUs should have been consumed"); |
| } |
| } else { |
| // packets discarded. Okay |
| } |
| |
| dc1.close(); |
| } |
| |
| |
| public static void main(String args[]) throws Exception { |
| InetAddress ia = InetAddress.getLocalHost(); |
| doTest(ia, true); |
| doTest(ia, false); |
| } |
| |
| } |