/*

 * Copyright (c) 2007, 2015, 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 java.net;

import java.io.IOException;

import java.util.Set;

import java.util.HashSet;

import java.util.Collections;

import jdk.net.*;

import static sun.net.ExtendedOptionsImpl.*;

/*

 * On Unix systems we simply delegate to native methods.

 *

 * @author Chris Hegarty

 */

class PlainDatagramSocketImpl extends AbstractPlainDatagramSocketImpl

{

    static {

        init();

    }

    protected <T> void setOption(SocketOption<T> name, T value) throws IOException {

        if (!name.equals(ExtendedSocketOptions.SO_FLOW_SLA)) {

            super.setOption(name, value);

        } else {

            if (isClosed()) {

                throw new SocketException("Socket closed");

            }

            checkSetOptionPermission(name);

            checkValueType(value, SocketFlow.class);

            setFlowOption(getFileDescriptor(), (SocketFlow)value);

        }

    }

    @SuppressWarnings("unchecked")

    protected <T> T getOption(SocketOption<T> name) throws IOException {

        if (!name.equals(ExtendedSocketOptions.SO_FLOW_SLA)) {

            return super.getOption(name);

        }

        if (isClosed()) {

            throw new SocketException("Socket closed");

        }

        checkGetOptionPermission(name);

        SocketFlow flow = SocketFlow.create();

        getFlowOption(getFileDescriptor(), flow);

        return (T)flow;

    }

    protected Set<SocketOption<?>> supportedOptions() {

        HashSet<SocketOption<?>> options = new HashSet<>(

            super.supportedOptions());

        if (flowSupported()) {

            options.add(ExtendedSocketOptions.SO_FLOW_SLA);

        }

        return options;

    }

    protected void socketSetOption(int opt, Object val) throws SocketException {

        try {

            socketSetOption0(opt, val);

        } catch (SocketException se) {

            if (!connected)

                throw se;

        }

    }

    protected synchronized native void bind0(int lport, InetAddress laddr)

        throws SocketException;

    protected native void send(DatagramPacket p) throws IOException;

    protected synchronized native int peek(InetAddress i) throws IOException;

    protected synchronized native int peekData(DatagramPacket p) throws IOException;

    protected synchronized native void receive0(DatagramPacket p)

        throws IOException;

    protected native void setTimeToLive(int ttl) throws IOException;

    protected native int getTimeToLive() throws IOException;

    @Deprecated

    protected native void setTTL(byte ttl) throws IOException;

    @Deprecated

    protected native byte getTTL() throws IOException;

    protected native void join(InetAddress inetaddr, NetworkInterface netIf)

        throws IOException;

    protected native void leave(InetAddress inetaddr, NetworkInterface netIf)

        throws IOException;

    protected native void datagramSocketCreate() throws SocketException;

    protected native void datagramSocketClose();

    protected native void socketSetOption0(int opt, Object val)

        throws SocketException;

    protected native Object socketGetOption(int opt) throws SocketException;

    protected native void connect0(InetAddress address, int port) throws SocketException;

    protected native void disconnect0(int family);

    native int dataAvailable();

    /**

     * Perform class load-time initializations.

     */

    private static native void init();

}