001 /* 002 * Copyright 2001-2005 The Apache Software Foundation 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 package org.apache.commons.net; 017 018 import java.net.DatagramSocket; 019 import java.net.InetAddress; 020 import java.net.SocketException; 021 022 /*** 023 * The DatagramSocketFactory interface provides a means for the 024 * programmer to control the creation of datagram sockets and 025 * provide his own DatagramSocket implementations for use by all 026 * classes derived from 027 * {@link org.apache.commons.net.DatagramSocketClient} 028 * . 029 * This allows you to provide your own DatagramSocket implementations and 030 * to perform security checks or browser capability requests before 031 * creating a DatagramSocket. 032 * <p> 033 * <p> 034 * @author Daniel F. Savarese 035 ***/ 036 037 public interface DatagramSocketFactory 038 { 039 040 /*** 041 * Creates a DatagramSocket on the local host at the first available port. 042 * <p> 043 * @exception SocketException If the socket could not be created. 044 ***/ 045 public DatagramSocket createDatagramSocket() throws SocketException; 046 047 /*** 048 * Creates a DatagramSocket on the local host at a specified port. 049 * <p> 050 * @param port The port to use for the socket. 051 * @exception SocketException If the socket could not be created. 052 ***/ 053 public DatagramSocket createDatagramSocket(int port) throws SocketException; 054 055 /*** 056 * Creates a DatagramSocket at the specified address on the local host 057 * at a specified port. 058 * <p> 059 * @param port The port to use for the socket. 060 * @param laddr The local address to use. 061 * @exception SocketException If the socket could not be created. 062 ***/ 063 public DatagramSocket createDatagramSocket(int port, InetAddress laddr) 064 throws SocketException; 065 }