    001    /*
    002     * Licensed to the Apache Software Foundation (ASF) under one or more
    003     * contributor license agreements.  See the NOTICE file distributed with
    004     * this work for additional information regarding copyright ownership.
    005     * The ASF licenses this file to You under the Apache License, Version 2.0
    006     * (the "License"); you may not use this file except in compliance with
    007     * the License.  You may obtain a copy of the License at
    008     *
    009     *      http://www.apache.org/licenses/LICENSE-2.0
    010     *
    011     * Unless required by applicable law or agreed to in writing, software
    012     * distributed under the License is distributed on an "AS IS" BASIS,
    013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014     * See the License for the specific language governing permissions and
    015     * limitations under the License.
    016     */
    017
    018    package org.apache.commons.net;
    019
    020    import java.net.DatagramSocket;
    021    import java.net.InetAddress;
    022    import java.net.SocketException;
    023
    024    /***
    025     * The DatagramSocketFactory interface provides a means for the
    026     * programmer to control the creation of datagram sockets and
    027     * provide his own DatagramSocket implementations for use by all
    028     * classes derived from
    029     * {@link org.apache.commons.net.DatagramSocketClient}
    030     * .
    031     * This allows you to provide your own DatagramSocket implementations and
    032     * to perform security checks or browser capability requests before
    033     * creating a DatagramSocket.
    034     * <p>
    035     * <p>
    036     * @author Daniel F. Savarese
    037     ***/
    038
    039    public interface DatagramSocketFactory
    040    {
    041
    042        /***
    043         * Creates a DatagramSocket on the local host at the first available port.
    044         * <p>
    045         * @exception SocketException If the socket could not be created.
    046         ***/
    047        public DatagramSocket createDatagramSocket() throws SocketException;
    048
    049        /***
    050         * Creates a DatagramSocket on the local host at a specified port.
    051         * <p>
    052         * @param port The port to use for the socket.
    053         * @exception SocketException If the socket could not be created.
    054         ***/
    055        public DatagramSocket createDatagramSocket(int port) throws SocketException;
    056
    057        /***
    058         * Creates a DatagramSocket at the specified address on the local host
    059         * at a specified port.
    060         * <p>
    061         * @param port The port to use for the socket.
    062         * @param laddr  The local address to use.
    063         * @exception SocketException If the socket could not be created.
    064         ***/
    065        public DatagramSocket createDatagramSocket(int port, InetAddress laddr)
    066        throws SocketException;
    067    }