//

 //  MYAddressLookup.h

 //  MYNetwork

 //

 //  Created by Jens Alfke on 4/24/09.

 //  Copyright 2009 Jens Alfke. All rights reserved.

 //

 #import "MYDNSService.h"

 /** An asynchronous DNS address lookup. Supports both Bonjour services and traditional hostnames. */

 @interface MYAddressLookup : MYDNSService

 {

     NSString *_hostname;

     UInt16 _interfaceIndex;

     NSMutableSet *_addresses;

     UInt16 _port;

     CFAbsoluteTime _expires;

 }

 /** Initializes the lookup with a DNS hostname.

     (If you've got a Bonjour service already, as a MYBonjourService object, it's more convenient

     to access its addressLookup property instead of creating your own instance.) */

 - (id) initWithHostname: (NSString*)hostname;

 /** The port number; this will be copied into the resulting IPAddress objects.

     Defaults to zero, but you can set it before calling -start. */

 @property UInt16 port;

 /** The index of the network interface to use, or zero (the default) for any interface.

     You usually don't need to set this. */

 @property UInt16 interfaceIndex;

 /** The resulting address(es) of the host, as HostAddress objects. */

 @property (readonly) NSSet *addresses;

 /** How much longer the addresses will remain valid.

     If the value is zero, the addresses are no longer valid, and you should instead

     call -start again and wait for the 'addresses' property to update.

     If you set the service to continuous mode, addresses will never expire since the

     query will continue to update them. */

 @property (readonly) NSTimeInterval timeToLive;

 @end