/*
* $Id$
*
* Copyright (C) 2003-2015 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.net.arp;
import org.jnode.net.HardwareAddress;
import org.jnode.net.ProtocolAddress;
/**
* Entry of the ARP cache
*
* @author epr
*/
public class ARPCacheEntry {
private static final long ARP_CACHE_LIFETIME = 10 * 60 * 1000;
private final long creationTime;
private long lifeTime;
private final HardwareAddress hardwareAddress;
private final ProtocolAddress protocolAddress;
private final boolean dynamic;
/**
* Create a new instance
*
* @param hardwareAddress
* @param protocolAddress
* @param dynamic
*/
public ARPCacheEntry(HardwareAddress hardwareAddress, ProtocolAddress protocolAddress, boolean dynamic) {
this.hardwareAddress = hardwareAddress;
this.protocolAddress = protocolAddress;
this.creationTime = System.currentTimeMillis();
// TODO make ARP cache lifetime configurable
this.lifeTime = ARP_CACHE_LIFETIME;
this.dynamic = dynamic;
}
/**
* Gets the creation time of this entry
*/
public long getCreationTime() {
return creationTime;
}
/**
* Is this entry expired?
*/
public boolean isExpired() {
return ((System.currentTimeMillis() - creationTime) >= lifeTime);
}
/**
* Gets the network address of this entry
*/
public HardwareAddress getHwAddress() {
return hardwareAddress;
}
/**
* Gets the protocol address of this entry
*/
public ProtocolAddress getPAddress() {
return protocolAddress;
}
/**
* Is this a dynamic entry?
*/
public boolean isDynamic() {
return dynamic;
}
/**
* Is this a static entry?
*/
public boolean isStatic() {
return !dynamic;
}
/**
* Convert to a String representation
*
* @see java.lang.Object#toString()
*/
public String toString() {
return protocolAddress + " " + hardwareAddress + ' ' + ((dynamic) ? "dynamic" : "static");
}
}