001/*
002 * ====================================================================
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *   http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing,
014 * software distributed under the License is distributed on an
015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
016 * KIND, either express or implied.  See the License for the
017 * specific language governing permissions and limitations
018 * under the License.
019 * ====================================================================
020 *
021 * This software consists of voluntary contributions made by many
022 * individuals on behalf of the Apache Software Foundation.  For more
023 * information on the Apache Software Foundation, please see
024 * <http://www.apache.org/>.
025 *
026 */
027
028package org.apache.http.conn.socket;
029
030import java.io.IOException;
031import java.net.Socket;
032import java.net.UnknownHostException;
033
034import org.apache.http.protocol.HttpContext;
035
036/**
037 * Extended {@link ConnectionSocketFactory} interface for layered sockets such as SSL/TLS.
038 *
039 * @since 4.3
040 */
041public interface LayeredConnectionSocketFactory extends ConnectionSocketFactory {
042
043    /**
044     * Returns a socket connected to the given host that is layered over an
045     * existing socket.  Used primarily for creating secure sockets through
046     * proxies.
047     *
048     * @param socket the existing socket
049     * @param target the name of the target host.
050     * @param port the port to connect to on the target host.
051     * @param context the actual HTTP context.
052     *
053     * @return Socket a new socket
054     *
055     * @throws IOException if an I/O error occurs while creating the socket
056     */
057    Socket createLayeredSocket(
058        Socket socket,
059        String target,
060        int port,
061        HttpContext context) throws IOException, UnknownHostException;
062
063}