/*

 * Copyright (c) 2014, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

package sun.net;

import java.net.*;

import jdk.net.*;

import java.io.IOException;

import java.io.FileDescriptor;

import java.security.PrivilegedAction;

import java.security.AccessController;

import java.lang.reflect.Field;

import java.util.Set;

import java.util.HashSet;

import java.util.HashMap;

import java.util.Collections;

/**

 * Contains the native implementation for extended socket options

 * together with some other static utilities

 */

public class ExtendedOptionsImpl {

    static {

        AccessController.doPrivileged((PrivilegedAction<Void>)() -> {

            System.loadLibrary("net");

            return null;

        });

        init();

    }

    private ExtendedOptionsImpl() {}

    public static void checkSetOptionPermission(SocketOption<?> option) {

        SecurityManager sm = System.getSecurityManager();

        if (sm == null) {

            return;

        }

        String check = "setOption." + option.name();

        sm.checkPermission(new NetworkPermission(check));

    }

    public static void checkGetOptionPermission(SocketOption<?> option) {

        SecurityManager sm = System.getSecurityManager();

        if (sm == null) {

            return;

        }

        String check = "getOption." + option.name();

        sm.checkPermission(new NetworkPermission(check));

    }

    public static void checkValueType(Object value, Class<?> type) {

        if (!type.isAssignableFrom(value.getClass())) {

            String s = "Found: " + value.getClass().toString() + " Expected: "

                        + type.toString();

            throw new IllegalArgumentException(s);

        }

    }

    private static native void init();

    /*

     * Extension native implementations

     *

     * SO_FLOW_SLA

     */

    public static native void setFlowOption(FileDescriptor fd, SocketFlow f);

    public static native void getFlowOption(FileDescriptor fd, SocketFlow f);

    public static native boolean flowSupported();

    public static native void setTcpKeepAliveProbes(FileDescriptor fd, int value) throws SocketException;

    public static native void setTcpKeepAliveTime(FileDescriptor fd, int value) throws SocketException;

    public static native void setTcpKeepAliveIntvl(FileDescriptor fd, int value) throws SocketException;

    public static native int getTcpKeepAliveProbes(FileDescriptor fd) throws SocketException;

    public static native int getTcpKeepAliveTime(FileDescriptor fd) throws SocketException;

    public static native int getTcpKeepAliveIntvl(FileDescriptor fd) throws SocketException;

    public static native boolean keepAliveOptionsSupported();

}