/*

 * Copyright (c) 2011, 2015, 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 6964547 5001942 8129444

 * @run main/othervm SocksProxyVersion

 * @summary test socksProxyVersion system property

 */

import java.net.InetSocketAddress;

import java.net.ServerSocket;

import java.net.Socket;

import java.net.SocketException;

import java.io.IOException;

import java.net.InetAddress;

import java.net.Proxy;

public class SocksProxyVersion implements Runnable {

    final ServerSocket ss;

    volatile boolean failed;

    volatile boolean stopped = false;

    volatile int expected;

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

        if (InetAddress.getLocalHost().isLoopbackAddress()) {

            System.out.println("Test cannot run. getLocalHost returns a loopback address");

            return;

        }

        new SocksProxyVersion();

    }

    public SocksProxyVersion() throws Exception {

        ss = new ServerSocket(0);

        int port = ss.getLocalPort();

        Thread serverThread = new Thread(this);

        serverThread.start();

        try (ServerSocket socket = ss) {

            runTest(port);

        } finally {

            stopped = true;

        }

        serverThread.join();

        if (failed) {

            throw new RuntimeException("socksProxyVersion not being set correctly");

        }

    }

    final void runTest(int port) throws Exception {

        /*

         * Retrieving the IP Address of the machine

         * since "localhost" is bypassed as a non-proxy host

         */

        String addr = InetAddress.getLocalHost().getHostAddress();

        System.setProperty("socksProxyHost", addr);

        System.setProperty("socksProxyPort", Integer.toString(port));

        Proxy proxy = new Proxy(Proxy.Type.SOCKS,

                                new InetSocketAddress(addr, port));

        // SOCKS V4

        System.setProperty("socksProxyVersion", Integer.toString(4));

        this.expected = 4;

        check(new Socket(), addr, port);

        check(new Socket(proxy), addr, port);

        // SOCKS V5

        System.setProperty("socksProxyVersion", Integer.toString(5));

        this.expected = 5;

        check(new Socket(), addr, port);

        check(new Socket(proxy), addr, port);

    }

    private void check(Socket socket, String addr, int port)

        throws IOException

    {

        try (Socket s = socket) {

            socket.connect(new InetSocketAddress(addr, port));

        } catch (SocketException e) {

            // java.net.SocketException: Malformed reply from SOCKS server

            // This exception is OK, since the "server" does not implement

            // the socks protocol. It just verifies the version and closes.

        }

    }

    @Override

    public void run() {

        int count = 0;

        try {

            while (!stopped) {

                try (Socket s = ss.accept()) {

                    int version = (s.getInputStream()).read();

                    if (version != expected) {

                        System.out.printf("Iteration: %d, Got: %d, expected: %d%n",

                                          count, version, expected);

                        failed = true;

                    }

                }

                count++;

            }

        } catch (IOException e) {

            if (!ss.isClosed()) {

                e.printStackTrace();

            }

            // ignore, server socket was closed

        }

    }

}