| /* |
| * Copyright (c) 2018, 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 8203059 |
| * @summary Test SocketChannel.close with SO_LINGER enabled |
| */ |
| |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.StandardSocketOptions; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.SelectionKey; |
| import java.nio.channels.Selector; |
| import java.nio.channels.ServerSocketChannel; |
| import java.nio.channels.SocketChannel; |
| |
| public class LingerOnClose { |
| |
| private enum TestMode { |
| BLOCKING, |
| NON_BLOCKING, |
| NON_BLOCKING_AND_REGISTERED; |
| } |
| |
| public static void main(String[] args) throws IOException { |
| // blocking mode |
| test(TestMode.BLOCKING, -1); |
| test(TestMode.BLOCKING, 0); |
| test(TestMode.BLOCKING, 1); |
| |
| // non-blocking mode |
| test(TestMode.NON_BLOCKING, -1); |
| test(TestMode.NON_BLOCKING, 0); |
| test(TestMode.NON_BLOCKING, 1); |
| |
| // non-blocking mode, close while registered with Selector |
| test(TestMode.NON_BLOCKING_AND_REGISTERED, -1); |
| test(TestMode.NON_BLOCKING_AND_REGISTERED, 0); |
| test(TestMode.NON_BLOCKING_AND_REGISTERED, 1); |
| } |
| |
| /** |
| * Test closing a SocketChannel with SO_LINGER set to the given linger |
| * interval. If the linger interval is 0, it checks that the peer observes |
| * a connection reset (TCP RST). |
| */ |
| static void test(TestMode mode, int interval) throws IOException { |
| SocketChannel sc = null; |
| SocketChannel peer = null; |
| Selector sel = null; |
| |
| try (ServerSocketChannel ssc = ServerSocketChannel.open()) { |
| ssc.bind(new InetSocketAddress(InetAddress.getLocalHost(), 0)); |
| |
| // establish loopback connection |
| sc = SocketChannel.open(ssc.getLocalAddress()); |
| peer = ssc.accept(); |
| |
| // configured blocking mode and register with Selector if needed |
| if (mode != TestMode.BLOCKING) |
| sc.configureBlocking(false); |
| if (mode == TestMode.NON_BLOCKING_AND_REGISTERED) { |
| sel = Selector.open(); |
| sc.register(sel, SelectionKey.OP_READ); |
| sel.selectNow(); |
| } |
| |
| // enable or disable SO_LINGER |
| sc.setOption(StandardSocketOptions.SO_LINGER, interval); |
| |
| // close channel and flush Selector if needed |
| sc.close(); |
| if (mode == TestMode.NON_BLOCKING_AND_REGISTERED) |
| sel.selectNow(); |
| |
| // read other end of connection, expect EOF or RST |
| ByteBuffer bb = ByteBuffer.allocate(100); |
| try { |
| int n = peer.read(bb); |
| if (interval == 0) { |
| throw new RuntimeException("RST expected"); |
| } else if (n != -1) { |
| throw new RuntimeException("EOF expected"); |
| } |
| } catch (IOException ioe) { |
| if (interval != 0) { |
| // exception not expected |
| throw ioe; |
| } |
| } |
| } finally { |
| if (sc != null) sc.close(); |
| if (peer != null) peer.close(); |
| if (sel != null) sel.close(); |
| } |
| } |
| } |