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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

 * 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).

 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

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/* @test

 * @bug 4849277 7183800

 * @summary Test DatagramChannel send while connected

 * @library ..

 * @run testng ConnectedSend

 * @author Mike McCloskey

 */

import java.io.*;

import java.net.*;

import java.nio.*;

import java.nio.channels.*;

import java.nio.charset.*;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

public class ConnectedSend {

    // Check if DatagramChannel.send while connected can include

    // address without throwing

    @Test

    public static void sendToConnectedAddress() throws Exception {

        DatagramChannel sndChannel = DatagramChannel.open();

        sndChannel.bind(null);

        InetAddress address = InetAddress.getLocalHost();

        if (address.isLoopbackAddress()) {

            address = InetAddress.getLoopbackAddress();

        }

        InetSocketAddress sender = new InetSocketAddress(

            address,

            sndChannel.socket().getLocalPort());

        DatagramChannel rcvChannel = DatagramChannel.open();

        rcvChannel.bind(null);

        InetSocketAddress receiver = new InetSocketAddress(

            address,

            rcvChannel.socket().getLocalPort());

        rcvChannel.connect(sender);

        sndChannel.connect(receiver);

        ByteBuffer bb = ByteBuffer.allocate(256);

        bb.put("hello".getBytes());

        bb.flip();

        int sent = sndChannel.send(bb, receiver);

        bb.clear();

        rcvChannel.receive(bb);

        bb.flip();

        CharBuffer cb = Charset.forName("US-ASCII").newDecoder().decode(bb);

        assertTrue(cb.toString().startsWith("h"), "Unexpected message content");

        rcvChannel.close();

        sndChannel.close();

    }

    // Check if the datagramsocket adaptor can send with a packet

    // that has not been initialized with an address; the legacy

    // datagram socket will send in this case

    @Test

    public static void sendAddressedPacket() throws Exception {

        DatagramChannel sndChannel = DatagramChannel.open();

        sndChannel.bind(null);

        InetAddress address = InetAddress.getLocalHost();

        if (address.isLoopbackAddress()) {

            address = InetAddress.getLoopbackAddress();

        }

        InetSocketAddress sender = new InetSocketAddress(

            address,

            sndChannel.socket().getLocalPort());

        DatagramChannel rcvChannel = DatagramChannel.open();

        rcvChannel.bind(null);

        InetSocketAddress receiver = new InetSocketAddress(

            address,

            rcvChannel.socket().getLocalPort());

        rcvChannel.connect(sender);

        sndChannel.connect(receiver);

        byte b[] = "hello".getBytes("UTF-8");

        DatagramPacket pkt = new DatagramPacket(b, b.length);

        sndChannel.socket().send(pkt);

        ByteBuffer bb = ByteBuffer.allocate(256);

        rcvChannel.receive(bb);

        bb.flip();

        CharBuffer cb = Charset.forName("US-ASCII").newDecoder().decode(bb);

        assertTrue(cb.toString().startsWith("h"), "Unexpected message content");

        // Check that the pkt got set with the target address;

        // This is legacy behavior

        assertEquals(pkt.getSocketAddress(), receiver,

            "Unexpected address set on packet");

        rcvChannel.close();

        sndChannel.close();

    }

}