/*

 * Copyright (c) 2018, 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.

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 */

@@END_COPYRIGHT@@

#include <stdio.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <netinet/tcp.h>

/* To be able to name the Java constants the same as the C constants without

   having the preprocessor rewrite those identifiers, add PREFIX_ to all

   identifiers matching a C constant. The PREFIX_ is filtered out in the

   makefile. */

@@START_HERE@@

package jdk.internal.net.rdma;

import java.net.SocketOption;

import java.net.StandardSocketOptions;

import java.net.ProtocolFamily;

import java.util.Map;

import java.util.HashMap;

class RdmaSocketOptionRegistry {

    private RdmaSocketOptionRegistry() { }

    private static class RegistryKey {

        private final SocketOption<?> name;

        private final ProtocolFamily family;

        RegistryKey(SocketOption<?> name, ProtocolFamily family) {

            this.name = name;

            this.family = family;

        }

        public int hashCode() {

            return name.hashCode() + family.hashCode();

        }

        public boolean equals(Object ob) {

            if (ob == null) return false;

            if (!(ob instanceof RegistryKey)) return false;

            RegistryKey other = (RegistryKey)ob;

            if (this.name != other.name) return false;

            if (this.family != other.family) return false;

            return true;

        }

    }

    private static class LazyInitialization {

        static final Map<RegistryKey,RdmaOptionKey> options = options();

        private static Map<RegistryKey,RdmaOptionKey> options() {

            Map<RegistryKey,RdmaOptionKey> map =

                new HashMap<RegistryKey,RdmaOptionKey>();

            map.put(new RegistryKey(StandardSocketOptions.PREFIX_SO_SNDBUF,

                RdmaNet.UNSPEC), new RdmaOptionKey(SOL_SOCKET, SO_SNDBUF));

            map.put(new RegistryKey(StandardSocketOptions.PREFIX_SO_RCVBUF,

                RdmaNet.UNSPEC), new RdmaOptionKey(SOL_SOCKET, SO_RCVBUF));

            map.put(new RegistryKey(StandardSocketOptions.PREFIX_SO_REUSEADDR,

                RdmaNet.UNSPEC), new RdmaOptionKey(SOL_SOCKET, SO_REUSEADDR));

            // IPPROTO_TCP is 6

            map.put(new RegistryKey(StandardSocketOptions.PREFIX_TCP_NODELAY,

                RdmaNet.UNSPEC), new RdmaOptionKey(6, TCP_NODELAY));

            return map;

        }

    }

    public static RdmaOptionKey findOption(SocketOption<?> name,

                                           ProtocolFamily family) {

        RegistryKey key = new RegistryKey(name, family);

        return LazyInitialization.options.get(key);

    }

}