michael@0: /**
michael@0:  * Copyright (c) 2012, Ben Fortuna
michael@0:  * All rights reserved.
michael@0:  *
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  *
michael@0:  *  o Redistributions of source code must retain the above copyright
michael@0:  * notice, this list of conditions and the following disclaimer.
michael@0:  *
michael@0:  *  o Redistributions in binary form must reproduce the above copyright
michael@0:  * notice, this list of conditions and the following disclaimer in the
michael@0:  * documentation and/or other materials provided with the distribution.
michael@0:  *
michael@0:  *  o Neither the name of Ben Fortuna nor the names of any other contributors
michael@0:  * may be used to endorse or promote products derived from this software
michael@0:  * without specific prior written permission.
michael@0:  *
michael@0:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
michael@0:  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
michael@0:  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
michael@0:  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
michael@0:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
michael@0:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
michael@0:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
michael@0:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
michael@0:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
michael@0:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
michael@0:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0:  */
michael@0: package net.fortuna.ical4j.util;
michael@0: 
michael@0: import java.net.InetAddress;
michael@0: import java.net.NetworkInterface;
michael@0: import java.net.SocketException;
michael@0: import java.util.Enumeration;
michael@0: 
michael@0: /**
michael@0:  * @author fortuna
michael@0:  *
michael@0:  */
michael@0: public class InetAddressHostInfo implements HostInfo {
michael@0: 
michael@0:     private final InetAddress hostAddress;
michael@0:     
michael@0:     /**
michael@0:      * @throws SocketException where an error occurs identifying the host address
michael@0:      */
michael@0:     public InetAddressHostInfo() throws SocketException {
michael@0:         this(findNonLoopbackAddress());
michael@0:     }
michael@0:     
michael@0:     /**
michael@0:      * @param address a host address
michael@0:      */
michael@0:     public InetAddressHostInfo(InetAddress address) {
michael@0:         this.hostAddress = address;
michael@0:     }
michael@0:     
michael@0:     /**
michael@0:      * {@inheritDoc}
michael@0:      */
michael@0:     public String getHostName() {
michael@0:         return hostAddress.getHostName();
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Find a non loopback address for this machine on which to start the server.
michael@0:      * @return a non loopback address
michael@0:      * @throws SocketException if a socket error occurs
michael@0:      */
michael@0:     private static InetAddress findNonLoopbackAddress() throws SocketException {
michael@0:         final Enumeration enumInterfaceAddress = NetworkInterface.getNetworkInterfaces();
michael@0:         while (enumInterfaceAddress.hasMoreElements()) {
michael@0:             final NetworkInterface netIf = (NetworkInterface) enumInterfaceAddress.nextElement();
michael@0: 
michael@0:             // Iterate over inet address
michael@0:             final Enumeration enumInetAdress = netIf.getInetAddresses();
michael@0:             while (enumInetAdress.hasMoreElements()) {
michael@0:                 final InetAddress address = (InetAddress) enumInetAdress.nextElement();
michael@0:                 if (!address.isLoopbackAddress()) {
michael@0:                     return address;
michael@0:                 }
michael@0:             }
michael@0:         }
michael@0:         return null;
michael@0:     }
michael@0: 
michael@0: }