/*

 * 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.

 */

/*

 * @test

 * @bug 8036979 8072384 8044773

 * @run main/othervm -Xcheck:jni OptionsTest

 * @run main/othervm -Xcheck:jni -Djava.net.preferIPv4Stack=true OptionsTest

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

 */

import java.lang.reflect.Method;

import java.net.*;

import java.util.*;

public class OptionsTest {

    static class Test {

        Test(SocketOption<?> option, Object testValue) {

            this.option = option;

            this.testValue = testValue;

        }

        static Test create (SocketOption<?> option, Object testValue) {

            return new Test(option, testValue);

        }

        Object option;

        Object testValue;

    }

    // The tests set the option using the new API, read back the set value

    // which could be diferent, and then use the legacy get API to check

    // these values are the same

    static Test[] socketTests = new Test[] {

        Test.create(StandardSocketOptions.SO_KEEPALIVE, Boolean.TRUE),

        Test.create(StandardSocketOptions.SO_SNDBUF, Integer.valueOf(10 * 100)),

        Test.create(StandardSocketOptions.SO_RCVBUF, Integer.valueOf(8 * 100)),

        Test.create(StandardSocketOptions.SO_REUSEADDR, Boolean.FALSE),

        Test.create(StandardSocketOptions.SO_REUSEPORT, Boolean.FALSE),

        Test.create(StandardSocketOptions.SO_LINGER, Integer.valueOf(80)),

        Test.create(StandardSocketOptions.IP_TOS, Integer.valueOf(100))

    };

    static Test[] serverSocketTests = new Test[] {

        Test.create(StandardSocketOptions.SO_RCVBUF, Integer.valueOf(8 * 100)),

        Test.create(StandardSocketOptions.SO_REUSEADDR, Boolean.FALSE),

        Test.create(StandardSocketOptions.SO_REUSEPORT, Boolean.FALSE),

        Test.create(StandardSocketOptions.IP_TOS, Integer.valueOf(100))

    };

    static Test[] dgSocketTests = new Test[] {

        Test.create(StandardSocketOptions.SO_SNDBUF, Integer.valueOf(10 * 100)),

        Test.create(StandardSocketOptions.SO_RCVBUF, Integer.valueOf(8 * 100)),

        Test.create(StandardSocketOptions.SO_REUSEADDR, Boolean.FALSE),

        Test.create(StandardSocketOptions.SO_REUSEPORT, Boolean.FALSE),

        Test.create(StandardSocketOptions.IP_TOS, Integer.valueOf(100))

    };

    static Test[] mcSocketTests = new Test[] {

        Test.create(StandardSocketOptions.IP_MULTICAST_IF, getNetworkInterface()),

        Test.create(StandardSocketOptions.IP_MULTICAST_TTL, Integer.valueOf(10)),

        Test.create(StandardSocketOptions.IP_MULTICAST_LOOP, Boolean.TRUE)

    };

    static NetworkInterface getNetworkInterface() {

        try {

            Enumeration<NetworkInterface> nifs = NetworkInterface.getNetworkInterfaces();

            while (nifs.hasMoreElements()) {

                NetworkInterface ni = (NetworkInterface)nifs.nextElement();

                if (ni.supportsMulticast()) {

                    return ni;

                }

            }

        } catch (Exception e) {

        }

        return null;

    }

    static void doSocketTests() throws Exception {

        try (

            ServerSocket srv = new ServerSocket(0);

            Socket c = new Socket("127.0.0.1", srv.getLocalPort());

            Socket s = srv.accept();

        ) {

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

            boolean reuseport = options.contains(StandardSocketOptions.SO_REUSEPORT);

            for (int i=0; i<socketTests.length; i++) {

                Test test = socketTests[i];

                if (!(test.option == StandardSocketOptions.SO_REUSEPORT && !reuseport)) {

                    c.setOption((SocketOption)test.option, test.testValue);

                    Object getval = c.getOption((SocketOption)test.option);

                    Object legacyget = legacyGetOption(Socket.class, c,test.option);

                    if (!getval.equals(legacyget)) {

                        Formatter f = new Formatter();

                        f.format("S Err %d: %s/%s", i, getval, legacyget);

                        throw new RuntimeException(f.toString());

                    }

                }

            }

        }

    }

    static void doDgSocketTests() throws Exception {

        try (

            DatagramSocket c = new DatagramSocket(0);

        ) {

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

            boolean reuseport = options.contains(StandardSocketOptions.SO_REUSEPORT);

            for (int i=0; i<dgSocketTests.length; i++) {

                Test test = dgSocketTests[i];

                if (!(test.option == StandardSocketOptions.SO_REUSEPORT && !reuseport)) {

                    c.setOption((SocketOption)test.option, test.testValue);

                    Object getval = c.getOption((SocketOption)test.option);

                    Object legacyget = legacyGetOption(DatagramSocket.class, c,test.option);

                    if (!getval.equals(legacyget)) {

                        Formatter f = new Formatter();

                        f.format("DG Err %d: %s/%s", i, getval, legacyget);

                        throw new RuntimeException(f.toString());

                    }

                }

            }

        }

    }

    static void doMcSocketTests() throws Exception {

        try (

            MulticastSocket c = new MulticastSocket(0);

        ) {

            for (int i=0; i<mcSocketTests.length; i++) {

                Test test = mcSocketTests[i];

                c.setOption((SocketOption)test.option, test.testValue);

                Object getval = c.getOption((SocketOption)test.option);

                Object legacyget = legacyGetOption(MulticastSocket.class, c,test.option);

                if (!getval.equals(legacyget)) {

                    Formatter f = new Formatter();

                    f.format("MC Err %d: %s/%s", i, getval, legacyget);

                    throw new RuntimeException(f.toString());

                }

            }

        }

    }

    static void doServerSocketTests() throws Exception {

        try (

            ServerSocket c = new ServerSocket(0);

        ) {

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

            boolean reuseport = options.contains(StandardSocketOptions.SO_REUSEPORT);

            for (int i=0; i<serverSocketTests.length; i++) {

                Test test = serverSocketTests[i];

                if (!(test.option == StandardSocketOptions.SO_REUSEPORT && !reuseport)) {

                    c.setOption((SocketOption)test.option, test.testValue);

                    Object getval = c.getOption((SocketOption)test.option);

                    Object legacyget = legacyGetOption(

                        ServerSocket.class, c, test.option

                    );

                    if (!getval.equals(legacyget)) {

                        Formatter f = new Formatter();

                        f.format("SS Err %d: %s/%s", i, getval, legacyget);

                        throw new RuntimeException(f.toString());

                    }

                }

            }

        }

    }

    static Object legacyGetOption(

        Class<?> type, Object s, Object option)

        throws Exception

    {

        if (type.equals(Socket.class)) {

            Socket socket = (Socket)s;

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

            boolean reuseport = options.contains(StandardSocketOptions.SO_REUSEPORT);

            if (option.equals(StandardSocketOptions.SO_KEEPALIVE)) {

                return Boolean.valueOf(socket.getKeepAlive());

            } else if (option.equals(StandardSocketOptions.SO_SNDBUF)) {

                return Integer.valueOf(socket.getSendBufferSize());

            } else if (option.equals(StandardSocketOptions.SO_RCVBUF)) {

                return Integer.valueOf(socket.getReceiveBufferSize());

            } else if (option.equals(StandardSocketOptions.SO_REUSEADDR)) {

                return Boolean.valueOf(socket.getReuseAddress());

            } else if (option.equals(StandardSocketOptions.SO_REUSEPORT) && reuseport) {

                return Boolean.valueOf(socket.getOption(StandardSocketOptions.SO_REUSEPORT));

            } else if (option.equals(StandardSocketOptions.SO_LINGER)) {

                return Integer.valueOf(socket.getSoLinger());

            } else if (option.equals(StandardSocketOptions.IP_TOS)) {

                return Integer.valueOf(socket.getTrafficClass());

            } else if (option.equals(StandardSocketOptions.TCP_NODELAY)) {

                return Boolean.valueOf(socket.getTcpNoDelay());

            } else {

                throw new RuntimeException("unexecpted socket option");

            }

        } else if  (type.equals(ServerSocket.class)) {

            ServerSocket socket = (ServerSocket)s;

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

            boolean reuseport = options.contains(StandardSocketOptions.SO_REUSEPORT);

            if (option.equals(StandardSocketOptions.SO_RCVBUF)) {

                return Integer.valueOf(socket.getReceiveBufferSize());

            } else if (option.equals(StandardSocketOptions.SO_REUSEADDR)) {

                return Boolean.valueOf(socket.getReuseAddress());

            } else if (option.equals(StandardSocketOptions.SO_REUSEPORT) && reuseport) {

                return Boolean.valueOf(socket.getOption(StandardSocketOptions.SO_REUSEPORT));

            } else if (option.equals(StandardSocketOptions.IP_TOS)) {

                return getServerSocketTrafficClass(socket);

            } else {

                throw new RuntimeException("unexecpted socket option");

            }

        } else if  (type.equals(DatagramSocket.class)) {

            DatagramSocket socket = (DatagramSocket)s;

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

            boolean reuseport = options.contains(StandardSocketOptions.SO_REUSEPORT);

            if (option.equals(StandardSocketOptions.SO_SNDBUF)) {

                return Integer.valueOf(socket.getSendBufferSize());

            } else if (option.equals(StandardSocketOptions.SO_RCVBUF)) {

                return Integer.valueOf(socket.getReceiveBufferSize());

            } else if (option.equals(StandardSocketOptions.SO_REUSEADDR)) {

                return Boolean.valueOf(socket.getReuseAddress());

            } else if (option.equals(StandardSocketOptions.SO_REUSEPORT) && reuseport) {

                return Boolean.valueOf(socket.getOption(StandardSocketOptions.SO_REUSEPORT));

            } else if (option.equals(StandardSocketOptions.IP_TOS)) {

                return Integer.valueOf(socket.getTrafficClass());

            } else {

                throw new RuntimeException("unexecpted socket option");

            }

        } else if  (type.equals(MulticastSocket.class)) {

            MulticastSocket socket = (MulticastSocket)s;

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

            boolean reuseport = options.contains(StandardSocketOptions.SO_REUSEPORT);

            if (option.equals(StandardSocketOptions.SO_SNDBUF)) {

                return Integer.valueOf(socket.getSendBufferSize());

            } else if (option.equals(StandardSocketOptions.SO_RCVBUF)) {

                return Integer.valueOf(socket.getReceiveBufferSize());

            } else if (option.equals(StandardSocketOptions.SO_REUSEADDR)) {

                return Boolean.valueOf(socket.getReuseAddress());

            } else if (option.equals(StandardSocketOptions.SO_REUSEPORT) && reuseport) {

                return Boolean.valueOf(socket.getOption(StandardSocketOptions.SO_REUSEPORT));

            } else if (option.equals(StandardSocketOptions.IP_TOS)) {

                return Integer.valueOf(socket.getTrafficClass());

            } else if (option.equals(StandardSocketOptions.IP_MULTICAST_IF)) {

                return socket.getNetworkInterface();

            } else if (option.equals(StandardSocketOptions.IP_MULTICAST_TTL)) {

                return Integer.valueOf(socket.getTimeToLive());

            } else if (option.equals(StandardSocketOptions.IP_MULTICAST_LOOP)) {

                return Boolean.valueOf(socket.getLoopbackMode());

            } else {

                throw new RuntimeException("unexecpted socket option");

            }

        }

        throw new RuntimeException("unexecpted socket type");

    }

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

        doSocketTests();

        doServerSocketTests();

        doDgSocketTests();

        doMcSocketTests();

    }

    // Reflectively access jdk.net.Sockets.getOption so that the test can run

    // without the jdk.net module.

    static Object getServerSocketTrafficClass(ServerSocket ss) throws Exception {

        try {

            Class<?> c = Class.forName("jdk.net.Sockets");

            Method m = c.getDeclaredMethod("getOption", ServerSocket.class, SocketOption.class);

            return m.invoke(null, ss, StandardSocketOptions.IP_TOS);

        } catch (ClassNotFoundException e) {

            // Ok, jdk.net module not present, just fall back

            System.out.println("jdk.net module not present, falling back.");

            return Integer.valueOf(ss.getOption(StandardSocketOptions.IP_TOS));

        } catch (ReflectiveOperationException e) {

            throw new AssertionError(e);

        }

    }

}