120 lines
4.2 KiB
Java
120 lines
4.2 KiB
Java
/*
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* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 8203059
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* @summary Test SocketChannel.close with SO_LINGER enabled
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*/
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import java.io.IOException;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.StandardSocketOptions;
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import java.nio.ByteBuffer;
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import java.nio.channels.SelectionKey;
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import java.nio.channels.Selector;
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import java.nio.channels.ServerSocketChannel;
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import java.nio.channels.SocketChannel;
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public class LingerOnClose {
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private enum TestMode {
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BLOCKING,
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NON_BLOCKING,
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NON_BLOCKING_AND_REGISTERED;
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}
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public static void main(String[] args) throws IOException {
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// blocking mode
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test(TestMode.BLOCKING, -1);
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test(TestMode.BLOCKING, 0);
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test(TestMode.BLOCKING, 1);
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// non-blocking mode
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test(TestMode.NON_BLOCKING, -1);
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test(TestMode.NON_BLOCKING, 0);
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test(TestMode.NON_BLOCKING, 1);
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// non-blocking mode, close while registered with Selector
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test(TestMode.NON_BLOCKING_AND_REGISTERED, -1);
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test(TestMode.NON_BLOCKING_AND_REGISTERED, 0);
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test(TestMode.NON_BLOCKING_AND_REGISTERED, 1);
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}
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/**
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* Test closing a SocketChannel with SO_LINGER set to the given linger
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* interval. If the linger interval is 0, it checks that the peer observes
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* a connection reset (TCP RST).
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*/
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static void test(TestMode mode, int interval) throws IOException {
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SocketChannel sc = null;
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SocketChannel peer = null;
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Selector sel = null;
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try (ServerSocketChannel ssc = ServerSocketChannel.open()) {
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ssc.bind(new InetSocketAddress(InetAddress.getLocalHost(), 0));
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// establish loopback connection
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sc = SocketChannel.open(ssc.getLocalAddress());
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peer = ssc.accept();
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// configured blocking mode and register with Selector if needed
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if (mode != TestMode.BLOCKING)
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sc.configureBlocking(false);
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if (mode == TestMode.NON_BLOCKING_AND_REGISTERED) {
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sel = Selector.open();
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sc.register(sel, SelectionKey.OP_READ);
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sel.selectNow();
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}
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// enable or disable SO_LINGER
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sc.setOption(StandardSocketOptions.SO_LINGER, interval);
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// close channel and flush Selector if needed
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sc.close();
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if (mode == TestMode.NON_BLOCKING_AND_REGISTERED)
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sel.selectNow();
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// read other end of connection, expect EOF or RST
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ByteBuffer bb = ByteBuffer.allocate(100);
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try {
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int n = peer.read(bb);
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if (interval == 0) {
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throw new RuntimeException("RST expected");
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} else if (n != -1) {
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throw new RuntimeException("EOF expected");
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}
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} catch (IOException ioe) {
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if (interval != 0) {
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// exception not expected
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throw ioe;
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}
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}
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} finally {
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if (sc != null) sc.close();
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if (peer != null) peer.close();
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if (sel != null) sel.close();
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}
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}
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}
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