/*
 * Copyright (c) 2001, 2002, 2004, 2005, 2008, 2012, 2015 Apple Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */

#ifndef _SCDYNAMICSTORECOPYDHCPINFO_H
#define _SCDYNAMICSTORECOPYDHCPINFO_H

#include <Availability.h>
#include <sys/cdefs.h>
#include <CoreFoundation/CoreFoundation.h>
#include <SystemConfiguration/SCDynamicStore.h>

CF_IMPLICIT_BRIDGING_ENABLED
CF_ASSUME_NONNULL_BEGIN

/*!
	@header SCDynamicStoreCopyDHCPInfo
	@discussion The functions of the SCDynamicStoreCopyDHCPInfo API
		provide access to information returned by the DHCP or
		BOOTP server.
 */


__BEGIN_DECLS

/*!
	@function SCDynamicStoreCopyDHCPInfo
	@discussion Copies the DHCP information for the requested serviceID,
		or the primary service if serviceID == NULL.
	@param store An SCDynamicStoreRef representing the dynamic store session
		that should be used for communication with the server.
		If NULL, a temporary session will be used.
	@param serviceID A CFStringRef containing the requested service.
		If NULL, returns information for the primary service.
	@result Returns a dictionary containing DHCP information if successful;
		NULL otherwise.
		Use the DHCPInfoGetOption function to retrieve
		individual options from the returned dictionary.

		A non-NULL return value must be released using CFRelease().
 */
CFDictionaryRef __nullable
SCDynamicStoreCopyDHCPInfo	(SCDynamicStoreRef	__nullable	store,
				 CFStringRef		__nullable	serviceID)	__OSX_AVAILABLE_STARTING(__MAC_10_1,__IPHONE_NA);

/*!
	@function DHCPInfoGetOptionData
	@discussion Returns a non-NULL CFDataRef containing the DHCP
		option data, if present.
	@param info The non-NULL DHCP information dictionary returned by
		calling SCDynamicStoreCopyDHCPInfo.
	@param code The DHCP option code (see RFC 2132) to return
		data for.
	@result Returns a non-NULL CFDataRef containing the option data;
		NULL if the requested option data is not present.

		The return value must NOT be released.
 */
CFDataRef __nullable
DHCPInfoGetOptionData		(CFDictionaryRef	info,
				 UInt8			code)		__OSX_AVAILABLE_STARTING(__MAC_10_1,__IPHONE_NA);

/*!
	@function DHCPInfoGetLeaseStartTime
	@discussion Returns a CFDateRef corresponding to the lease start time,
		if present.
	@param info The non-NULL DHCP information dictionary returned by
		calling SCDynamicStoreCopyDHCPInfo.
	@result Returns a non-NULL CFDateRef if lease start time information is
		present; NULL if the information is not present or if the
		configuration method is not DHCP.

		The return value must NOT be released.
 */
CFDateRef __nullable
DHCPInfoGetLeaseStartTime	(CFDictionaryRef	info)		__OSX_AVAILABLE_STARTING(__MAC_10_1,__IPHONE_NA);


/*!
	@function DHCPInfoGetLeaseExpirationTime
	@discussion Returns a CFDateRef corresponding to the lease expiration time,
		if present.
	@param info The non-NULL DHCP information dictionary returned by
		calling SCDynamicStoreCopyDHCPInfo.
	@result Returns a non-NULL CFDateRef if the DHCP lease has an expiration;
		NULL if the lease is infinite i.e. has no expiration, or the
		configuration method is not DHCP. An infinite lease can be determined
		by a non-NULL lease start time (see DHCPInfoGetLeaseStartTime above).

		The return value must NOT be released.
*/
CFDateRef __nullable
DHCPInfoGetLeaseExpirationTime	(CFDictionaryRef	info)		__OSX_AVAILABLE_STARTING(__MAC_10_8,__IPHONE_NA);

__END_DECLS

CF_ASSUME_NONNULL_END
CF_IMPLICIT_BRIDGING_DISABLED

#endif	/* _SCDYNAMICSTORECOPYDHCPINFO_H */