/*

 * 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);

            }

        }

    }

}