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      1 /*
      2 * Conditions Of Use
      3 *
      4 * This software was developed by employees of the National Institute of
      5 * Standards and Technology (NIST), an agency of the Federal Government.
      6 * Pursuant to title 15 Untied States Code Section 105, works of NIST
      7 * employees are not subject to copyright protection in the United States
      8 * and are considered to be in the public domain.  As a result, a formal
      9 * license is not needed to use the software.
     10 *
     11 * This software is provided by NIST as a service and is expressly
     12 * provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
     13 * OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
     14 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
     15 * AND DATA ACCURACY.  NIST does not warrant or make any representations
     16 * regarding the use of the software or the results thereof, including but
     17 * not limited to the correctness, accuracy, reliability or usefulness of
     18 * the software.
     19 *
     20 * Permission to use this software is contingent upon your acceptance
     21 * of the terms of this agreement
     22 *
     23 * .
     24 *
     25 */
     26 package gov.nist.core.net;
     27 
     28 import java.io.IOException;
     29 import java.net.DatagramSocket;
     30 import java.net.InetAddress;
     31 import java.net.InetSocketAddress;
     32 import java.net.MulticastSocket;
     33 import java.net.ServerSocket;
     34 import java.net.Socket;
     35 import java.net.SocketException;
     36 
     37 /* Added by Daniel J. Martinez Manzano <dani (at) dif.um.es> */
     38 import javax.net.ssl.SSLSocket;
     39 import javax.net.ssl.SSLSocketFactory;
     40 import javax.net.ssl.SSLServerSocket;
     41 import javax.net.ssl.SSLServerSocketFactory;
     42 
     43 /**
     44  * default implementation which passes straight through to java platform
     45  *
     46  * @author m.andrews
     47  * @version 1.2
     48  * @since 1.1
     49  *
     50  */
     51 public class DefaultNetworkLayer implements NetworkLayer {
     52 
     53     private SSLSocketFactory sslSocketFactory;
     54 
     55     private SSLServerSocketFactory sslServerSocketFactory;
     56 
     57     /**
     58      * single default network layer; for flexibility, it may be better not to
     59      * make it a singleton, but singleton seems to make sense currently.
     60      */
     61     public static final DefaultNetworkLayer SINGLETON = new DefaultNetworkLayer();
     62 
     63     private DefaultNetworkLayer() {
     64         sslServerSocketFactory = (SSLServerSocketFactory) SSLServerSocketFactory
     65                 .getDefault();
     66         sslSocketFactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
     67     }
     68 
     69     public ServerSocket createServerSocket(int port, int backlog,
     70             InetAddress bindAddress) throws IOException {
     71         return new ServerSocket(port, backlog, bindAddress);
     72     }
     73 
     74     public Socket createSocket(InetAddress address, int port)
     75             throws IOException {
     76         return new Socket(address, port);
     77     }
     78 
     79     public DatagramSocket createDatagramSocket() throws SocketException {
     80         return new DatagramSocket();
     81     }
     82 
     83     public DatagramSocket createDatagramSocket(int port, InetAddress laddr)
     84             throws SocketException {
     85 
     86         if ( laddr.isMulticastAddress() ) {
     87             try {
     88                 MulticastSocket ds = new MulticastSocket( port );
     89                 ds.joinGroup( laddr );
     90                 return ds;
     91             } catch (IOException e) {
     92                 throw new SocketException( e.getLocalizedMessage() );
     93             }
     94         } else return new DatagramSocket(port, laddr);
     95     }
     96 
     97     /* Added by Daniel J. Martinez Manzano <dani (at) dif.um.es> */
     98     public SSLServerSocket createSSLServerSocket(int port, int backlog,
     99             InetAddress bindAddress) throws IOException {
    100         return (SSLServerSocket) sslServerSocketFactory.createServerSocket(
    101                 port, backlog, bindAddress);
    102     }
    103 
    104     /* Added by Daniel J. Martinez Manzano <dani (at) dif.um.es> */
    105     public SSLSocket createSSLSocket(InetAddress address, int port)
    106             throws IOException {
    107         return (SSLSocket) sslSocketFactory.createSocket(address, port);
    108     }
    109 
    110     /* Added by Daniel J. Martinez Manzano <dani (at) dif.um.es> */
    111     public SSLSocket createSSLSocket(InetAddress address, int port,
    112             InetAddress myAddress) throws IOException {
    113         return (SSLSocket) sslSocketFactory.createSocket(address, port,
    114                 myAddress, 0);
    115     }
    116 
    117     public Socket createSocket(InetAddress address, int port,
    118             InetAddress myAddress) throws IOException {
    119         if (myAddress != null)
    120             return new Socket(address, port, myAddress, 0);
    121         else
    122             return new Socket(address, port);
    123     }
    124 
    125     /**
    126      * Creates a new Socket, binds it to myAddress:myPort and connects it to
    127      * address:port.
    128      *
    129      * @param address the InetAddress that we'd like to connect to.
    130      * @param port the port that we'd like to connect to
    131      * @param myAddress the address that we are supposed to bind on or null
    132      *        for the "any" address.
    133      * @param myPort the port that we are supposed to bind on or 0 for a random
    134      * one.
    135      *
    136      * @return a new Socket, bound on myAddress:myPort and connected to
    137      * address:port.
    138      * @throws IOException if binding or connecting the socket fail for a reason
    139      * (exception relayed from the correspoonding Socket methods)
    140      */
    141     public Socket createSocket(InetAddress address, int port,
    142                     InetAddress myAddress, int myPort)
    143         throws IOException
    144     {
    145         if (myAddress != null)
    146             return new Socket(address, port, myAddress, myPort);
    147         else if (port != 0)
    148         {
    149             //myAddress is null (i.e. any)  but we have a port number
    150             Socket sock = new Socket();
    151             sock.bind(new InetSocketAddress(port));
    152             sock.connect(new InetSocketAddress(address, port));
    153             return sock;
    154         }
    155         else
    156             return new Socket(address, port);
    157     }
    158 
    159 }
    160