SendUrgentData.java

/*
 * Copyright (c) 2015, 2019, 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 8071599
 * @run main/othervm SendUrgentData
 * @run main/othervm SendUrgentData -inline
 * @summary Test sending of urgent data.
 */

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.net.SocketException;
import java.nio.ByteBuffer;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;

public class SendUrgentData {

    /**
     * The arguments may be one of the following:
     * <ol>
     * <li>-server</li>
     * <li>-client host port [-inline]</li>
     * <li>[-inline]</li>
     * </ol>
     * The first option creates a standalone server, the second a standalone
     * client, and the third a self-contained server-client pair on the
     * local host.
     *
     * @param args
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {

        ServerSocketChannelThread serverThread
                = new ServerSocketChannelThread("SendUrgentDataServer");
        serverThread.start();
        boolean b = serverThread.isAlive();

        String host = null;
        int port = 0;
        boolean inline = false;
        if (args.length > 0 && args[0].equals("-server")) {
            System.out.println(serverThread.getAddress());
            Thread.currentThread().suspend();
        } else {
            if (args.length > 0 && args[0].equals("-client")) {
                host = args[1];
                port = Integer.parseInt(args[2]);
                if (args.length > 3) {
                    inline = args[2].equals("-inline");
                }
            } else {
                host = "localhost";
                port = serverThread.getAddress().getPort();
                if (args.length > 0) {
                    inline = args[0].equals("-inline");
                }
            }
        }

        System.out.println("OOB Inline : "+inline);

        SocketAddress sa = new InetSocketAddress(host, port);

        try (SocketChannel sc = SocketChannel.open(sa)) {
            sc.configureBlocking(false);
            sc.socket().setOOBInline(inline);

            sc.socket().sendUrgentData(0);
            System.out.println("wrote 1 OOB byte");

            ByteBuffer bb = ByteBuffer.wrap(new byte[100 * 1000]);

            int blocked = 0;
            long total = 0;

            int n;
            do {
                n = sc.write(bb);
                if (n == 0) {
                    System.out.println("blocked, wrote " + total + " so far");
                    if (++blocked == 10) {
                        break;
                    }
                    Thread.sleep(100);
                } else {
                    total += n;
                    bb.rewind();
                }
            } while (n > 0);

            long attempted = 0;
            while (attempted < total) {
                bb.rewind();
                n = sc.write(bb);
                System.out.println("wrote " + n + " normal bytes");
                attempted += bb.capacity();

                String osName = System.getProperty("os.name").toLowerCase();

                try {
                    sc.socket().sendUrgentData(0);
                } catch (IOException ex) {
                    if (osName.contains("linux")) {
                        if (!ex.getMessage().contains("Socket buffer full")) {
                            throw new RuntimeException("Unexpected message", ex);
                        }
                    } else if (osName.contains("os x") || osName.contains("mac")) {
                        if (!ex.getMessage().equals("No buffer space available")) {
                            throw new RuntimeException("Unexpected message", ex);
                        }
                    } else if (osName.contains("windows")) {
                        if (!ex.getMessage().equals("Socket buffer full")) {
                            throw new RuntimeException("Unexpected message", ex);
                        }
                    } else {
                        throw new RuntimeException("Unexpected IOException", ex);
                    }
                }

                try {
                    Thread.sleep(100);
                } catch (InterruptedException ex) {
                    // don't want to fail on this so just print trace and break
                    ex.printStackTrace();
                    break;
                }
            }
        } finally {
            serverThread.close();
        }
    }

    static class ServerSocketChannelThread extends Thread {

        private ServerSocketChannel ssc;

        private ServerSocketChannelThread(String name) {
            super(name);
            try {
                ssc = ServerSocketChannel.open();
                ssc.bind(new InetSocketAddress((0)));
            } catch (IOException ex) {
                throw new RuntimeException(ex);
            }
        }

        public void run() {
            while (ssc.isOpen()) {
                try {
                    Thread.sleep(100);
                } catch (InterruptedException ex) {
                    throw new RuntimeException(ex);
                }
            }
            try {
                ssc.close();
            } catch (IOException ex) {
                throw new RuntimeException(ex);
            }
            System.out.println("ServerSocketChannelThread exiting ...");
        }

        public InetSocketAddress getAddress() throws IOException {
            if (ssc == null) {
                throw new IllegalStateException("ServerSocketChannel not created");
            }

            return (InetSocketAddress) ssc.getLocalAddress();
        }

        public void close() {
            try {
                ssc.close();
            } catch (IOException ex) {
                throw new RuntimeException(ex);
            }
        }
    }
}