J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 3 | * |
| 4 | * This code is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License version 2 only, as |
| 6 | * published by the Free Software Foundation. Sun designates this |
| 7 | * particular file as subject to the "Classpath" exception as provided |
| 8 | * by Sun in the LICENSE file that accompanied this code. |
| 9 | * |
| 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 13 | * version 2 for more details (a copy is included in the LICENSE file that |
| 14 | * accompanied this code). |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License version |
| 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | * |
| 20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 21 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 22 | * have any questions. |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * |
| 27 | * (C) Copyright IBM Corp. 1999 All Rights Reserved. |
| 28 | * Copyright 1997 The Open Group Research Institute. All rights reserved. |
| 29 | */ |
| 30 | |
| 31 | package sun.security.krb5.internal; |
| 32 | |
| 33 | import java.io.*; |
| 34 | import java.net.*; |
| 35 | |
| 36 | public class UDPClient { |
| 37 | InetAddress iaddr; |
| 38 | int iport; |
| 39 | int bufSize = 65507; |
| 40 | DatagramSocket dgSocket; |
| 41 | DatagramPacket dgPacketIn; |
| 42 | |
| 43 | public UDPClient(InetAddress newIAddr, int port) |
| 44 | throws SocketException { |
| 45 | iaddr = newIAddr; |
| 46 | iport = port; |
| 47 | dgSocket = new DatagramSocket(); |
| 48 | } |
| 49 | |
| 50 | public UDPClient(String hostname, int port) |
| 51 | throws UnknownHostException, SocketException { |
| 52 | iaddr = InetAddress.getByName(hostname); |
| 53 | iport = port; |
| 54 | dgSocket = new DatagramSocket(); |
| 55 | } |
| 56 | |
| 57 | public UDPClient(String hostname, int port, int timeout) |
| 58 | throws UnknownHostException, SocketException { |
| 59 | iaddr = InetAddress.getByName(hostname); |
| 60 | iport = port; |
| 61 | dgSocket = new DatagramSocket(); |
| 62 | dgSocket.setSoTimeout(timeout); |
| 63 | } |
| 64 | |
| 65 | public void setBufSize(int newBufSize) { |
| 66 | bufSize = newBufSize; |
| 67 | } |
| 68 | |
| 69 | public InetAddress getInetAddress() { |
| 70 | if (dgPacketIn != null) |
| 71 | return dgPacketIn.getAddress(); |
| 72 | return null; |
| 73 | } |
| 74 | |
| 75 | public void send(byte[] data) throws IOException { |
| 76 | DatagramPacket dgPacketOut = new DatagramPacket(data, data.length, |
| 77 | iaddr, iport); |
| 78 | dgSocket.send(dgPacketOut); |
| 79 | } |
| 80 | |
| 81 | public byte[] receive() throws IOException { |
| 82 | byte ibuf[] = new byte[bufSize]; |
| 83 | dgPacketIn = new DatagramPacket(ibuf, ibuf.length); |
| 84 | try { |
| 85 | dgSocket.receive(dgPacketIn); |
| 86 | } |
| 87 | catch (SocketException e) { |
| 88 | dgSocket.receive(dgPacketIn); |
| 89 | } |
| 90 | byte[] data = new byte[dgPacketIn.getLength()]; |
| 91 | System.arraycopy(dgPacketIn.getData(), 0, data, 0, |
| 92 | dgPacketIn.getLength()); |
| 93 | return data; |
| 94 | } |
| 95 | |
| 96 | } |