/*

 * Copyright (c) 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.

 */

import javax.naming.Context;

import javax.naming.ldap.InitialLdapContext;

import java.io.IOException;

import java.io.OutputStream;

import java.net.InetAddress;

import java.net.Socket;

import java.util.Hashtable;

import java.util.concurrent.Semaphore;

import java.util.concurrent.TimeUnit;

/*

 * @test

 * @bug 8217606

 * @summary The LdapContext.reconnect method allows LDAP clients to initiate an

 *          LDAP bind operation on the existing connection. Invoking this method

 *          should not open a new connection under those circumstances.

 *

 * @library ../lib/

 * @run main Reconnect

 */

public class Reconnect {

    private static final byte[] BIND_RESPONSE = {

            0x30, 0x0C, 0x02, 0x01, 0x01, 0x61, 0x07, 0x0A,

            0x01, 0x00, 0x04, 0x00, 0x04, 0x00

    };

    /*

     * This test checks that there's only one connection from the client to

     * the server.

     *

     * The mechanics is as follows. The first connection is awaited for some

     * generous timeout to factor in a possibility of running on a slow system.

     * Once the connection has been made, the second timeout begins. This

     * second timeout is smaller. The test then verifies that no further

     * connections have been made for that amount of time.

     */

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

        final Semaphore s = new Semaphore(0);

        BaseLdapServer server = new BaseLdapServer() {

            @Override

            protected void beforeConnectionHandled(Socket socket) {

                // Increment the number of connections from LDAP client

                s.release(1);

            }

            @Override

            protected void handleRequest(Socket socket,

                                         LdapMessage msg,

                                         OutputStream out)

                    throws IOException

            {

                switch (msg.getOperation()) {

                    case BIND_REQUEST:

                        out.write(BIND_RESPONSE);

                    default:

                        break;

                }

            }

        };

        try (var s1 = server.start()) {

            Hashtable<String, Object> env = new Hashtable<>();

            env.put(Context.INITIAL_CONTEXT_FACTORY,

                    "com.sun.jndi.ldap.LdapCtxFactory");

            env.put(Context.PROVIDER_URL,

                    "ldap://" + InetAddress.getLoopbackAddress().getHostName()

                            + ":" + server.getPort());

            env.put("java.naming.ldap.version", "3");

            // open connection

            InitialLdapContext context = new InitialLdapContext(env, null);

            // send bind request

            context.addToEnvironment(Context.SECURITY_AUTHENTICATION, "simple");

            context.addToEnvironment(Context.SECURITY_PRINCIPAL, "test");

            context.addToEnvironment(Context.SECURITY_CREDENTIALS, "secret");

            context.reconnect(null);

        }

        if (!s.tryAcquire(60L, TimeUnit.SECONDS)) {

            throw new RuntimeException("No connection has been made");

        }

        if (s.tryAcquire(5L, TimeUnit.SECONDS)) {

            throw new RuntimeException("Expected 1 connection, but found: "

                                               + (s.availablePermits() + 2));

        }

    }

}