/*

 * Copyright (c) 2014, 2019, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @library /test/lib

 * @requires !vm.graal.enabled

 * @run main/othervm -Xcheck:jni OptionsTest

 * @run main/othervm -Djdk.net.usePlainSocketImpl 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.*;

import jdk.test.lib.net.IPSupport;

public class OptionsTest {

    static class Test<T> {

        final SocketOption<T> option;

        final T value;

        Test(SocketOption<T> option, T value) {

            this.option = option;

            this.value = value;

        }

        static <T> Test<T> create(SocketOption<T> option, T value) {

            return new Test<T>(option, value);

        }

    }

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

    // which could be different, 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(-1)),

        Test.create(StandardSocketOptions.SO_LINGER, Integer.valueOf(0)),

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

        Test.create(StandardSocketOptions.IP_TOS, Integer.valueOf(0)),  // lower-bound

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

        Test.create(StandardSocketOptions.IP_TOS, Integer.valueOf(255))  //upper-bound

    };

    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(0)),  // lower-bound

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

        Test.create(StandardSocketOptions.IP_TOS, Integer.valueOf(255))  //upper-bound

    };

    static Test<?>[] datagramSocketTests = 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.SO_BROADCAST, Boolean.FALSE),

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

        Test.create(StandardSocketOptions.IP_TOS, Integer.valueOf(0)),  // lower-bound

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

        Test.create(StandardSocketOptions.IP_TOS, Integer.valueOf(255))  //upper-bound

    };

    static Test<?>[] multicastSocketTests = new Test<?>[] {

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

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

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

        Test.create(StandardSocketOptions.IP_MULTICAST_TTL, Integer.valueOf(0)),   // lower-bound

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

        Test.create(StandardSocketOptions.IP_MULTICAST_TTL, Integer.valueOf(255)), //upper-bound

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

    };

    static NetworkInterface getNetworkInterface() {

        try {

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

            while (nifs.hasMoreElements()) {

                NetworkInterface ni = nifs.nextElement();

                if (ni.supportsMulticast()) {

                    return ni;

                }

            }

        } catch (Exception e) {

        }

        return null;

    }

    static boolean okayToTest(Socket s, SocketOption<?> option) {

        if (option == StandardSocketOptions.SO_REUSEPORT) {

            // skip SO_REUSEPORT if option is not supported

            return s.supportedOptions().contains(StandardSocketOptions.SO_REUSEPORT);

        }

        if (option == StandardSocketOptions.IP_TOS && s.isConnected()) {

            // skip IP_TOS if connected

            return false;

        }

        return true;

    }

    static <T> void testEqual(SocketOption<T> option, T value1, T value2) {

        if (!value1.equals(value2)) {

            throw new RuntimeException("Test of " + option.name() + " failed: "

                    + value1 + " != " + value2);

        }

    }

    static <T> void test(Socket s, Test<T> test) throws Exception {

        SocketOption<T> option = test.option;

        s.setOption(option, test.value);

        T value1 = s.getOption(test.option);

        T value2 = (T) legacyGetOption(Socket.class, s, test.option);

        testEqual(option, value1, value2);

    }

    static <T> void test(ServerSocket ss, Test<T> test) throws Exception {

        SocketOption<T> option = test.option;

        ss.setOption(option, test.value);

        T value1 = ss.getOption(test.option);

        T value2 = (T) legacyGetOption(ServerSocket.class, ss, test.option);

        testEqual(option, value1, value2);

    }

    static <T> void test(DatagramSocket ds, Test<T> test) throws Exception {

        SocketOption<T> option = test.option;

        ds.setOption(option, test.value);

        T value1 = ds.getOption(test.option);

        T value2 = (T) legacyGetOption(ds.getClass(), ds, test.option);

        testEqual(option, value1, value2);

    }

    // Tests default and negative values of SO_LINGER. All negative values should

    // retrieve as -1.

    static void testSoLingerValues() throws Exception {

        try (Socket s = new Socket()) {

            // retrieve without set

            int defaultValue = s.getOption(StandardSocketOptions.SO_LINGER);

            testEqual(StandardSocketOptions.SO_LINGER, -1, defaultValue);

            for (int v : List.of(-1, -2, -100, -65534, -65535, -65536, -100000)) {

                System.out.println("Testing SO_LINGER with:" + v);

                s.setOption(StandardSocketOptions.SO_LINGER, v);

                int value = s.getOption(StandardSocketOptions.SO_LINGER);

                testEqual(StandardSocketOptions.SO_LINGER, -1, value);

            }

        }

    }

    @SuppressWarnings("try")

    static void doSocketTests() throws Exception {

        // unconnected socket

        try (Socket s = new Socket()) {

            for (Test<?> test : socketTests) {

                if (okayToTest(s, test.option)) {

                    test(s, test);

                }

            }

        }

        // connected socket

        try (ServerSocket ss = new ServerSocket()) {

            var loopback = InetAddress.getLoopbackAddress();

            ss.bind(new InetSocketAddress(loopback, 0));

            try (Socket s1 = new Socket()) {

                s1.connect(ss.getLocalSocketAddress());

                try (Socket s2 = ss.accept()) {

                    for (Test<?> test : socketTests) {

                        if (okayToTest(s1, test.option)) {

                            test(s1, test);

                        }

                    }

                }

            }

        }

        testSoLingerValues();

    }

    static void doServerSocketTests() throws Exception {

        try (ServerSocket ss = new ServerSocket(0)) {

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

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

            for (Test<?> test : serverSocketTests) {

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

                    test(ss, test);

                }

            }

        }

    }

    static void doDatagramSocketTests() throws Exception {

        try (DatagramSocket ds = new DatagramSocket(0)) {

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

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

            for (Test<?> test : datagramSocketTests) {

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

                    test(ds, test);

                }

            }

        }

    }

    static void doMulticastSocketTests() throws Exception {

        try (MulticastSocket ms = new MulticastSocket(0)) {

            for (Test<?> test : multicastSocketTests) {

                test(ms, test);

            }

        }

    }

    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("unexpected 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("unexpected 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_BROADCAST)) {

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

            } 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("unexpected 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_BROADCAST)) {

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

            } 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)) {

            } else {

                throw new RuntimeException("unexpected socket option");

            }

        }

        throw new RuntimeException("unexpected socket type");

    }

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

        IPSupport.throwSkippedExceptionIfNonOperational();

        doSocketTests();

        doServerSocketTests();

        doDatagramSocketTests();

        doMulticastSocketTests();

    }

    // 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);

        }

    }

}