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 018package org.apache.commons.net; 019 020import java.net.DatagramSocket; 021import java.net.InetAddress; 022import java.net.SocketException; 023 024/** 025 * The DatagramSocketFactory interface provides a means for the programmer to control the creation of datagram sockets and provide his own DatagramSocket 026 * implementations for use by all classes derived from {@link org.apache.commons.net.DatagramSocketClient} . This allows you to provide your own DatagramSocket 027 * implementations and to perform security checks or browser capability requests before creating a DatagramSocket. 028 * 029 * 030 */ 031 032public interface DatagramSocketFactory { 033 034 /** 035 * Creates a DatagramSocket on the local host at the first available port. 036 * 037 * @return the socket 038 * 039 * @throws SocketException If the socket could not be created. 040 */ 041 DatagramSocket createDatagramSocket() throws SocketException; 042 043 /** 044 * Creates a DatagramSocket on the local host at a specified port. 045 * 046 * @param port The port to use for the socket. 047 * @return the socket 048 * @throws SocketException If the socket could not be created. 049 */ 050 DatagramSocket createDatagramSocket(int port) throws SocketException; 051 052 /** 053 * Creates a DatagramSocket at the specified address on the local host at a specified port. 054 * 055 * @param port The port to use for the socket. 056 * @param laddr The local address to use. 057 * @return the socket 058 * @throws SocketException If the socket could not be created. 059 */ 060 DatagramSocket createDatagramSocket(int port, InetAddress laddr) throws SocketException; 061}