/*

 * 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

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package jdk.internal.net.rdma;

import java.io.IOException;

import java.net.InetAddress;

import java.net.InetSocketAddress;

import java.net.ServerSocket;

import java.net.Socket;

import java.net.SocketAddress;

import java.net.SocketException;

import java.net.SocketTimeoutException;

import java.net.StandardSocketOptions;

import java.nio.channels.IllegalBlockingModeException;

import java.nio.channels.NotYetBoundException;

import java.nio.channels.ServerSocketChannel;

import java.nio.channels.SocketChannel;

import sun.nio.ch.Net;

class RdmaServerSocketAdaptor

    extends ServerSocket

{

    private final RdmaServerSocketChannelImpl ssc;

    private volatile int timeout;

    public static ServerSocket create(RdmaServerSocketChannelImpl ssc) {

        try {

            return new RdmaServerSocketAdaptor(ssc);

        } catch (IOException x) {

            throw new Error(x);

        }

    }

    private RdmaServerSocketAdaptor(RdmaServerSocketChannelImpl ssc)

            throws IOException {

        this.ssc = ssc;

    }

    public void bind(SocketAddress local) throws IOException {

        bind(local, 50);

    }

    public void bind(SocketAddress local, int backlog) throws IOException {

        if (local == null)

            local = new InetSocketAddress(0);

        try {

            ssc.bind(local, backlog);

        } catch (Exception x) {

            Net.translateException(x);

        }

    }

    public InetAddress getInetAddress() {

        InetSocketAddress local = ssc.localAddress();

        if (local == null) {

            return null;

        } else {

            return Net.getRevealedLocalAddress(local).getAddress();

        }

    }

    public int getLocalPort() {

        InetSocketAddress local = ssc.localAddress();

        if (local == null) {

            return -1;

        } else {

            return local.getPort();

        }

    }

    public Socket accept() throws IOException {

        synchronized (ssc.blockingLock()) {

            try {

                if (!ssc.isBound())

                    throw new NotYetBoundException();

                long to = this.timeout;

                if (to == 0) {

                    // for compatibility reasons: accept connection if available

                    // when configured non-blocking

                    SocketChannel sc = ssc.accept();

                    if (sc == null && !ssc.isBlocking())

                        throw new IllegalBlockingModeException();

                    return sc.socket();

                }

                if (!ssc.isBlocking())

                    throw new IllegalBlockingModeException();

                for (;;) {

                    long st = System.currentTimeMillis();

                    if (ssc.pollAccept(to))

                        return ssc.accept().socket();

                    to -= System.currentTimeMillis() - st;

                    if (to <= 0)

                        throw new SocketTimeoutException();

                }

            } catch (Exception x) {

                Net.translateException(x);

                assert false;

                return null;            // Never happens

            }

        }

    }

    public void close() throws IOException {

        ssc.close();

    }

    public ServerSocketChannel getChannel() {

        return ssc;

    }

    public boolean isBound() {

        return ssc.isBound();

    }

    public boolean isClosed() {

        return !ssc.isOpen();

    }

    public void setSoTimeout(int timeout) throws SocketException {

        this.timeout = timeout;

    }

    public int getSoTimeout() throws SocketException {

        return timeout;

    }

    public void setReuseAddress(boolean on) throws SocketException {

        try {

            ssc.setOption(StandardSocketOptions.SO_REUSEADDR, on);

        } catch (IOException x) {

            Net.translateToSocketException(x);

        }

    }

    public boolean getReuseAddress() throws SocketException {

        try {

            return ssc.getOption(StandardSocketOptions.SO_REUSEADDR)

                      .booleanValue();

        } catch (IOException x) {

            Net.translateToSocketException(x);

            return false;       // Never happens

        }

    }

    public String toString() {

        if (!isBound())

            return "RdmaServerSocket[unbound]";

        return "RdmaServerSocket[addr=" + getInetAddress() +

               ",localport=" + getLocalPort()  + "]";

    }

    public void setReceiveBufferSize(int size) throws SocketException {

        // size 0 valid for ServerSocketChannel, invalid for ServerSocket

        if (size <= 0)

            throw new IllegalArgumentException("size cannot be 0 or negative");

        try {

            ssc.setOption(StandardSocketOptions.SO_RCVBUF, size);

        } catch (IOException x) {

            Net.translateToSocketException(x);

        }

    }

    public int getReceiveBufferSize() throws SocketException {

        try {

            return ssc.getOption(StandardSocketOptions.SO_RCVBUF).intValue();

        } catch (IOException x) {

            Net.translateToSocketException(x);

            return -1;          // Never happens

        }

    }

}