//

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    If the value is zero, the addresses are no longer valid, and you should instead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