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junixsocket is a Java/JNI library that allows the use of Unix Domain Sockets (AF_UNIX sockets) and other socket types, such as AF_TIPC and AF_VSOCK, from Java, using the standard Socket API

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/*
 * junixsocket
 *
 * Copyright 2009-2024 Christian Kohlschütter
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.newsclub.net.unix;

import java.net.DatagramSocket;
import java.net.Socket;
import java.net.SocketAddress;
import java.nio.channels.DatagramChannel;
import java.nio.channels.SocketChannel;

import org.eclipse.jdt.annotation.Nullable;

/**
 * Marker interface that combines junixsocket-based {@link SocketChannel}s, {@link Socket}s,
 * {@link DatagramChannel}s and {@link DatagramSocket}s.
 *
 * @author Christian Kohlschütter
 * @see AFSocketPair
 * @see AFSocket
 * @see AFSocketChannel
 * @see AFDatagramSocket
 * @see AFDatagramChannel
 */
public interface AFSomeSocket extends AFSomeSocketThing {
  /**
   * Returns the socket's remote socket address, or {@code null} if unavailable/not connected, or if
   * there was a problem retrieving it.
   *
   * @return The remote socket address, or {@code null}.
   */
  @Nullable
  SocketAddress getRemoteSocketAddress();
}