/*

 * Copyright (c) 2018, 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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 * questions.

 */

/* @test

 * @bug 8195160

 * @summary Test for nonblocking connect and finishConnect

 * @requires (os.family == "linux")

 * @library .. /test/lib

 * @build jdk.test.lib.Utils TestServers

 * @build RsocketTest

 * @run main/othervm BasicConnect

 */

import java.net.InetSocketAddress;

import java.net.StandardProtocolFamily;

import java.nio.ByteBuffer;

import java.nio.channels.SelectionKey;

import java.nio.channels.Selector;

import java.nio.channels.SocketChannel;

import java.nio.channels.spi.SelectorProvider;

import java.util.Iterator;

import java.util.Set;

import jdk.net.RdmaSockets;

import jtreg.SkippedException;

/**

 * Typically there would be more than one channel registered to select

 * on, this test is just a very simple version with only one channel

 * registered for the connectSelector.

 */

public class BasicConnect {

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

        if (!RsocketTest.isRsocketAvailable())

            throw new SkippedException("rsocket is not available");

        Selector connectSelector =

            RdmaSockets.openSelector();

        try {

            TestServers.EchoServer echoServer

                = TestServers.EchoServer.startNewServer(100);

            InetSocketAddress isa

                = new InetSocketAddress(echoServer.getAddress(),

                                        echoServer.getPort());

            SocketChannel sc = RdmaSockets.openSocketChannel(

                StandardProtocolFamily.INET);

            sc.configureBlocking(false);

            boolean result = sc.connect(isa);

            if (result) {

                System.out.println("Socket immediately connected on "

                        + System.getProperty("os.name")

                        + ": " + sc);

            }

            while (!result) {

                SelectionKey connectKey = sc.register(connectSelector,

                                                      SelectionKey.OP_CONNECT);

                int keysAdded = connectSelector.select();

                if (keysAdded > 0) {

                    Set readyKeys = connectSelector.selectedKeys();

                    Iterator i = readyKeys.iterator();

                    while (i.hasNext()) {

                        SelectionKey sk = (SelectionKey)i.next();

                        i.remove();

                        SocketChannel nextReady = (SocketChannel)sk.channel();

                        result = nextReady.finishConnect();

                        if (result)

                            sk.cancel();

                    }

                }

            }

            byte[] bs = new byte[] { (byte)0xca, (byte)0xfe,

                                     (byte)0xba, (byte)0xbe };

            ByteBuffer bb = ByteBuffer.wrap(bs);

            sc.configureBlocking(true);

            sc.write(bb);

            bb.rewind();

            ByteBuffer bb2 = ByteBuffer.allocateDirect(100);

            int n = sc.read(bb2);

            bb2.flip();

            sc.close();

            connectSelector.close();

            if (!bb.equals(bb2))

                throw new Exception("Echoed bytes incorrect: Sent "

                                    + bb + ", got " + bb2);

        } catch (Exception e) {

            e.printStackTrace();

            throw new RuntimeException("Test Failed!");

        } 

    }

}