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 * 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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 * 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,

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/* @test

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

 * @requires !vm.graal.enabled

 * @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 {

    }

        // check supported options

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

        boolean reuseport = options.contains(SO_REUSEPORT);

        List<? extends SocketOption<?>> expected;

        if (reuseport) {

           expected = Arrays.asList(SO_SNDBUF, SO_RCVBUF,

                      SO_REUSEADDR, SO_REUSEPORT, SO_BROADCAST, IP_TOS, IP_MULTICAST_IF,

                      IP_MULTICAST_TTL, IP_MULTICAST_LOOP);

        } else {

           expected = Arrays.asList(SO_SNDBUF, SO_RCVBUF,

                      SO_REUSEADDR, SO_BROADCAST, IP_TOS, IP_MULTICAST_IF, IP_MULTICAST_TTL,

                      IP_MULTICAST_LOOP);

        }

        for (SocketOption opt: expected) {

            if (!options.contains(opt))

                throw new RuntimeException(opt.name() + " should be supported");

        }

        // check specified defaults

        checkOption(dc, SO_BROADCAST, false);

        checkOption(dc, IP_MULTICAST_TTL, 1);           // true on supported platforms

        checkOption(dc, IP_MULTICAST_LOOP, true);       // true on supported platforms

        // allowed to change when not bound

        dc.setOption(SO_BROADCAST, true);

        checkOption(dc, SO_BROADCAST, true);

        dc.setOption(SO_BROADCAST, false);

        checkOption(dc, SO_BROADCAST, false);

        dc.setOption(SO_SNDBUF, 128*1024);       // can't check

        dc.setOption(SO_RCVBUF, 128*1024);       // can't check

        int before, after;

        before = dc.getOption(SO_SNDBUF);

        after = dc.setOption(SO_SNDBUF, Integer.MAX_VALUE).getOption(SO_SNDBUF);

        if (after < before)

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

        before = dc.getOption(SO_RCVBUF);

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

        if (after < before)

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

        dc.setOption(SO_REUSEADDR, true);

        checkOption(dc, SO_REUSEADDR, true);

        dc.setOption(SO_REUSEADDR, false);

        checkOption(dc, SO_REUSEADDR, false);

        if (reuseport) {

            dc.setOption(SO_REUSEPORT, true);

            checkOption(dc, SO_REUSEPORT, true);

            dc.setOption(SO_REUSEPORT, false);

            checkOption(dc, SO_REUSEPORT, false);

        }

        // bind socket

        // allow to change when bound

        dc.setOption(SO_BROADCAST, true);

        checkOption(dc, SO_BROADCAST, true);

        dc.setOption(SO_BROADCAST, false);

        checkOption(dc, SO_BROADCAST, false);

        dc.setOption(IP_TOS, 0x08);     // can't check

        dc.setOption(IP_MULTICAST_TTL, 2);

        checkOption(dc, IP_MULTICAST_TTL, 2);

        dc.setOption(IP_MULTICAST_LOOP, false);

        checkOption(dc, IP_MULTICAST_LOOP, false);

        dc.setOption(IP_MULTICAST_LOOP, true);

        checkOption(dc, IP_MULTICAST_LOOP, true);

        // NullPointerException

        try {

            dc.setOption(null, "value");

            throw new RuntimeException("NullPointerException not thrown");

        } catch (NullPointerException x) {

        }

        try {

            dc.getOption(null);

            throw new RuntimeException("NullPointerException not thrown");

        } catch (NullPointerException x) {

        }

        // ClosedChannelException

        dc.close();

        try {

            dc.setOption(IP_MULTICAST_LOOP, true);

            throw new RuntimeException("ClosedChannelException not thrown");

        } catch (ClosedChannelException x) {

        }

    }

}