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/*
* Conditions Of Use
*
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain. As a result, a formal
* license is not needed to use the software.
*
* This software is provided by NIST as a service and is expressly
* provided "AS IS." NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY. NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
*
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*
* .
*
*/
package gov.nist.core.net;
import java.net.InetAddress;
import java.net.UnknownHostException;
import javax.sip.address.Hop;
/**
* An interface that allows you to customize address lookup.
* The user can implement this interface to do DNS lookups or other lookup
* schemes and register it with the stack.
* The default implementation of the address resolver does nothing more than just return back
* the Hop that it was passed (fixing up the port if necessary).
* However, this behavior can be overriden. To override
* implement this interface and register it with the stack using
* {@link gov.nist.javax.sip.SipStackExt#setAddressResolver(AddressResolver)}.
* This interface will be incorporated into version 2.0 of the JAIN-SIP Specification.
*
* @since 2.0
*
*
* @author M. Ranganathan
*
*/
public interface AddressResolver {
/**
* Do a name lookup and resolve the given IP address.
* The default implementation is just an identity mapping
* (returns the argument).
*
* @param hop - an incoming Hop containing a potenitally unresolved address.
* @return a new hop ( if the address is recomputed ) or the original hop
* if this is just an identity mapping ( the default behavior ).
*/
public Hop resolveAddress( Hop hop);
}
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