| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.kerberos.client; |
| |
| import java.io.DataInputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.net.DatagramPacket; |
| import java.net.DatagramSocket; |
| import java.net.InetSocketAddress; |
| import java.net.Socket; |
| import java.net.SocketAddress; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * A class for sending and receiving kerberos request and response data |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class KerberosChannel |
| { |
| /** the TCP socket */ |
| private Socket tcpSocket; |
| |
| /** the UDP socket */ |
| private DatagramSocket udpSocket; |
| |
| /** data input stream to read from */ |
| private DataInputStream in; |
| |
| /** data output stream to write to */ |
| private OutputStream out; |
| |
| /** flag to detect if this is a UDP channel */ |
| private boolean useUdp; |
| |
| private int timeOut = 60000; |
| |
| /** the UDP socket address of the server */ |
| private SocketAddress udpServerAddr = null; |
| |
| protected void openConnection( String hostName, int portNo, int timeOut, boolean isUdp ) throws IOException |
| { |
| this.useUdp = isUdp; |
| this.timeOut = timeOut; |
| |
| if ( isUdp ) |
| { |
| udpServerAddr = new InetSocketAddress( hostName, portNo ); |
| udpSocket = new DatagramSocket(); |
| } |
| else |
| { |
| tcpSocket = new Socket( hostName, portNo ); |
| tcpSocket.setSoTimeout( ( int ) timeOut ); |
| in = new DataInputStream( tcpSocket.getInputStream() ); |
| out = tcpSocket.getOutputStream(); |
| } |
| } |
| |
| |
| protected ByteBuffer sendAndReceive( ByteBuffer encodedBuf ) throws IOException |
| { |
| byte[] reqData = encodedBuf.array(); |
| |
| ByteBuffer repData; |
| |
| if ( useUdp ) |
| { |
| DatagramPacket reqPacket = new DatagramPacket( reqData, reqData.length, udpServerAddr ); |
| udpSocket.send( reqPacket ); |
| |
| byte[] buffer = new byte[2048]; |
| DatagramPacket repPacket = new DatagramPacket( buffer, buffer.length ); |
| udpSocket.receive( repPacket ); |
| |
| byte[] receivedData = repPacket.getData(); |
| repData = ByteBuffer.allocate( receivedData.length ); |
| repData.put( receivedData ); |
| } |
| else |
| { |
| out.write( reqData ); |
| out.flush(); |
| |
| int len = in.readInt(); |
| |
| repData = ByteBuffer.allocate( len + 4 ); |
| repData.putInt( len ); |
| |
| byte[] tmp = new byte[ 1024 * 8 ]; |
| while ( in.available() > 0 ) |
| { |
| int read = in.read( tmp ); |
| repData.put( tmp, 0, read ); |
| } |
| } |
| |
| repData.flip(); |
| |
| return repData; |
| } |
| |
| |
| protected boolean isUseTcp() |
| { |
| return !useUdp; |
| } |
| |
| |
| protected void close() throws IOException |
| { |
| if( useUdp ) |
| { |
| if( udpSocket != null ) |
| { |
| udpSocket.close(); |
| } |
| } |
| else |
| { |
| if( tcpSocket != null ) |
| { |
| tcpSocket.close(); |
| } |
| } |
| } |
| } |
| |