/*

 * Copyright (c) 2001, 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 4094894

 * @summary On W95/W98 it's not possible to send a datagram >12k

 *          via the loopback address.

 * @run main Send12k

 * @run main/othervm -Djava.net.preferIPv6Addresses=true Send12k

 */

import java.net.*;

import java.io.*;

public class Send12k {

    public static void main(String args[]) throws Exception {

         int SEND_SIZE=0;

         if(System.getProperty("os.name").contains("Mac")) {

             SEND_SIZE = 16 * 576;

         } else {

             SEND_SIZE = 16 * 1024;

         }

        InetAddress localHost = InetAddress.getLocalHost();

        DatagramSocket s1 = new DatagramSocket();

        DatagramSocket s2 = new DatagramSocket(0, localHost);

        byte b1[] = new byte[ SEND_SIZE ];

        DatagramPacket p1 = new DatagramPacket(b1, 0, b1.length,

                                               localHost,

                                               s2.getLocalPort());

        boolean sendOkay = true;

        try {

            System.out.println("Sending to: [" + localHost + "]:" + s2.getLocalPort());

            s1.send(p1);

        } catch (IOException e) {

            /*

             * Prior to merlin a send of > 12k to loopback address

             * would fail silently.

             */

            System.out.println("Sending failed: " + e);

            sendOkay = false;

        }

        if (sendOkay) {

            byte b2[] = new byte[ SEND_SIZE * 2];

            DatagramPacket p2 = new DatagramPacket( b2, SEND_SIZE * 2 );

            s2.setSoTimeout(2000);

            try {

                s2.receive(p1);

            } catch (InterruptedIOException ioe) {

                throw new Exception("Datagram not received within timeout");

            }

            if (p1.getLength() != SEND_SIZE) {

                throw new Exception("Received datagram incorrect size");

            }

        }

    }

}