/*

 * Copyright (c) 2000, 2016, 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

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 */

/**

 * @test

 * @bug 4361783

 * @key intermittent

 * @summary  Test to see if ICMP Port Unreachable on non-connected

 *           DatagramSocket causes a SocketException "socket closed"

 *           exception on Windows 2000.

 */

import java.net.InetAddress;

import java.net.DatagramSocket;

import java.net.DatagramPacket;

public class PortUnreachable {

    DatagramSocket clientSock;

    int serverPort;

    int clientPort;

    public void serverSend() {

        try {

            InetAddress addr = InetAddress.getLocalHost();

            Thread.currentThread().sleep(1000);

            // send a delayed packet which should mean a delayed icmp

            // port unreachable

            byte b[] = "A late msg".getBytes();

            DatagramPacket packet = new DatagramPacket(b, b.length, addr,

                                                       serverPort);

            clientSock.send(packet);

            DatagramSocket sock = new DatagramSocket(serverPort);

            b = "Greetings from the server".getBytes();

            packet = new DatagramPacket(b, b.length, addr, clientPort);

            sock.send(packet);

            sock.close();

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

    PortUnreachable() throws Exception {

        clientSock = new DatagramSocket();

        clientPort = clientSock.getLocalPort();

    }

    void execute () throws Exception{

        // pick a port for the server

        DatagramSocket sock2 = new DatagramSocket();

        serverPort = sock2.getLocalPort();

        // send a burst of packets to the unbound port - we should get back

        // icmp port unreachable messages

        //

        InetAddress addr = InetAddress.getLocalHost();

        byte b[] = "Hello me".getBytes();

        DatagramPacket packet = new DatagramPacket(b, b.length, addr,

                                                   serverPort);

        //close just before sending

        sock2.close();

        for (int i=0; i<100; i++)

            clientSock.send(packet);

        serverSend();

        // try to receive

        b = new byte[25];

        packet = new DatagramPacket(b, b.length, addr, serverPort);

        clientSock.setSoTimeout(10000);

        clientSock.receive(packet);

        System.out.println("client received data packet " + new String(packet.getData()));

        // done

        clientSock.close();

    }

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

        PortUnreachable test = new PortUnreachable();

        test.execute();

    }

}