/*

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

 *

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 * 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.

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/* @test

 * @bug 4640544 8044773

 * @summary Unit test for ServerSocketChannel setOption/getOption/options

 *          methods.

 * @run main SocketOptionTests

 * @run main/othervm --limit-modules=java.base SocketOptionTests

 */

import java.nio.*;

import java.nio.channels.*;

import java.net.*;

import java.io.IOException;

import java.util.*;

import static java.net.StandardSocketOptions.*;

public class SocketOptionTests {

    static void checkOption(ServerSocketChannel ssc, SocketOption name, Object expectedValue)

        throws IOException

    {

        Object value = ssc.getOption(name);

        if (!value.equals(expectedValue))

            throw new RuntimeException("value not as expected");

    }

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

        ServerSocketChannel ssc = ServerSocketChannel.open();

        // check supported options

        Set<SocketOption<?>> options = ssc.supportedOptions();

        boolean reuseport = options.contains(SO_REUSEPORT);

        if (!options.contains(SO_REUSEADDR))

            throw new RuntimeException("SO_REUSEADDR should be supported");

        if (!options.contains(SO_REUSEPORT) && reuseport)

            throw new RuntimeException("SO_REUSEPORT should be supported");

        if (!options.contains(SO_RCVBUF))

            throw new RuntimeException("SO_RCVBUF should be supported");

        // allowed to change when not bound

        ssc.setOption(SO_RCVBUF, 256*1024);     // can't check

        int before = ssc.getOption(SO_RCVBUF);

        int after = ssc.setOption(SO_RCVBUF, Integer.MAX_VALUE).getOption(SO_RCVBUF);

        if (after < before)

            throw new RuntimeException("setOption caused SO_RCVBUF to decrease");

        ssc.setOption(SO_REUSEADDR, true);

        checkOption(ssc, SO_REUSEADDR, true);

        ssc.setOption(SO_REUSEADDR, false);

        checkOption(ssc, SO_REUSEADDR, false);

        if (reuseport) {

            ssc.setOption(SO_REUSEPORT, true);

            checkOption(ssc, SO_REUSEPORT, true);

            ssc.setOption(SO_REUSEPORT, false);

            checkOption(ssc, SO_REUSEPORT, false);

        }

        // NullPointerException

        try {

            ssc.setOption(null, "value");

            throw new RuntimeException("NullPointerException not thrown");

        } catch (NullPointerException x) {

        }

        try {

            ssc.getOption(null);

            throw new RuntimeException("NullPointerException not thrown");

        } catch (NullPointerException x) {

        }

        // ClosedChannelException

        ssc.close();

        try {

            ssc.setOption(SO_REUSEADDR, true);

            throw new RuntimeException("ClosedChannelException not thrown");

        } catch (ClosedChannelException x) {

        }

    }

}