/*

 * Copyright (c) 2007, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/* @test

   @bug  6598160

   @summary Windows IPv6 Socket implementation doesn't set the handle to not inherit

   @author Chris Hegarty

 */

import java.net.BindException;

import java.net.ServerSocket;

import java.io.File;

import java.io.IOException;

/**

 * This test is only really applicable to Windows machines that are running IPv6, but

 * it should still pass on other platforms so we can just run it.

 */

public class InheritHandle

{

    static String java = System.getProperty("java.home") + File.separator +

                         "bin" + File.separator + "java";

    public static void main(String[] args) {

        if (args.length == 1) {

            doWait();

        } else {

            startTest();

        }

    }

    static void startTest() {

        ServerSocket ss;

        int port;

        Process process;

        // create a ServerSocket listening on any port

        try {

            ss = new ServerSocket(0);

            port = ss.getLocalPort();

            System.out.println("First ServerSocket listening on port " + port);

        } catch (IOException e) {

            System.out.println("Cannot create ServerSocket");

            e.printStackTrace();

            return;

        }

        // create another java process that simply waits. If the bug is present this

        // process will inherit the native IPv6 handle for ss and cause the second

        // ServerSocket constructor to throw a BindException

        try {

            process = Runtime.getRuntime().exec(java + " InheritHandle -doWait");

        } catch (IOException ioe) {

            System.out.println("Cannot create process");

            ioe.printStackTrace();

            try {

                ss.close();

            } catch (IOException e) {

                e.printStackTrace();

            }

            return;

        }

        // Allow some time for the process to get started

        try {

            System.out.println("waiting...");

            Thread.sleep(2 * 1000);

            System.out.println("Now close the socket and try to create another" +

                               " one listening on the same port");

            ss.close();

            int retries = 0;

            while (retries < 5) {

                try (ServerSocket s = new ServerSocket(port);) {

                    System.out.println("Second ServerSocket created successfully");

                    break;

                } catch (BindException e) {

                    System.out.println("BindException \"" + e.getMessage() + "\", retrying...");

                    Thread.sleep(100L);

                    retries ++;

                    continue;

                }

            }

        } catch (InterruptedException ie) {

        } catch (IOException ioe) {

            throw new RuntimeException("Failed: " + ioe);

        } finally {

            process.destroy();

        }

        System.out.println("OK");

    }

    static void doWait() {

        try {

            Thread.sleep(200 * 1000);

        } catch (InterruptedException ie) {

        }

    }

}