?? connectionfilter.java
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//License/*** * Java TelnetD library (embeddable telnet daemon) * Copyright (c) 2000-2005 Dieter Wimberger * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of the author nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS ``AS * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. ***/
package net.wimpi.telnetd.net;
import java.net.InetAddress;
import java.util.Properties;
/**
* Interface defining a generic IP level connection
* filter.<br>
* Due to the fact that this task depends heavily on
* application context, I chose a very generic way
* of applying IP level connection filtering.
* <br><br>
* Implementations should consider following issues:
* <ul>
* <li>performance
* <li>administration (maybe via an admin shell)
* <li>logging denials
* </ul>
*
* @author Dieter Wimberger
* @version 2.0 (16/07/2006)
*/
public interface ConnectionFilter {
/**
* Initializes this <tt>ConnectionFilter</tt>.
*
* @param props the properties of the listener that instantiated
* this <tt>ConnectionFilter</tt>.
*/
public void initialize(Properties props);
/**
* Tests if a given ip address is allowed to connect.
*
* @param ip the address to be tested.
* @return true if allowed to connect, false otherwise.
*/
public boolean isAllowed(InetAddress ip);
}//interface ConnectionFilter
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