/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#ifndef __DNSCONSTANTS_H__

#define __DNSCONSTANTS_H__

#include <in_sock.h> 

const TInt KDnsPort = 53;

const TInt KMdnsPort = 5353;

const TUint32 KMDnsAddr = INET_ADDR(224, 0, 0, 251);

const TInt KDnsTtl = 60 * 60;               //< default one hour TTL

const TInt KKnownAnswerTtl = 120;

const TInt KQueryWaitInterval = 225;        //<milliseconds between query loops.

const TInt KProbeWaitInterval = 250;        //<milliseconds between probe loops.

const TInt KResponseMinWaitInterval = 20;   //<minimal wait interval for response.

const TInt KResponseMaxWaitInterval = 115;  //<maximal wait interval for response

const TInt KProbeConflictInterval = 1000;   //<milliseconds to wait after conflict.

const TInt KAnnounceWaitInterval = 1000;    //<milliseconds between Announce loops.

const TInt KRecordReaperInterval = 10000;   //<milliseconds between cache cleanups.

const TInt KMaxDnsPacketSize = 9216;        //<max mdns packet size

//Dns Opcodes

const TUint16 KDnsOpcode_QUERY	= 0x00; 	//< Standard Query

const TUint16 KDnsOpcode_IQUERY	= 0x01;	    //< Inverse Query (historical)

const TUint16 KDnsOpcode_STATUS	= 0x02;	    //< Server Status Query

const TUint16 KDnsOpcode_UPDATE = 0x05;     //< Dynamic mDNS

const TInt KResponseBit = 0x8000;

const TInt KPointerBit = 0xC0;

const TInt KPointerOffsetBit = 0x3F;

const TUint16 KFlushBit = 0x8000;

const TUint16 KQueryBit = KFlushBit;

const TUint KMaxLabelLength = 63;

const TUint KMaxDNSNameLength= 256;

const TInt KDnsBufferlength = 1000;

//mDNS RR Types

enum TDnsType

	{

	EDnsType_IGNORE     = 0,	//< This is a hack to stop further processing

	EDnsType_A			= 1,	//< a host address

	EDnsType_NS			= 2,	//< an authoritative name server

	EDnsType_MD			= 3,	//< a mail destination (Obsolete - use MX)

	EDnsType_MF			= 4,	//< a mail forwarder (Obsolete - use MX)

	EDnsType_CNAME		= 5,	//< the canonical name for an alias

	EDnsType_SOA		= 6,	//< marks the start of a zone of authority

	EDnsType_MB			= 7,	//< a mailbox domain name 

	EDnsType_MG			= 8,	//< a mail group member 

	EDnsType_MR			= 9,	//< a mail rename domain name 

	EDnsType_NULL		= 10,	//< a null RR 

	EDnsType_WKS		= 11,	//< a well known service description

	EDnsType_PTR		= 12,	//< a domain name pointer

	EDnsType_HINFO		= 13,	//< host information

	EDnsType_MINFO		= 14,	//< mailbox or mail list information

	EDnsType_MX			= 15,	//< mail exchange

	EDnsType_TXT		= 16,	//< text strings

	EDnsType_AAAA		= 28,	//< single IPv6 address (RFC-1886)

	EDnsType_DNAME		= 29,	//< Non-Terminal DNS Name Redirection (RFC-2672)

	EDnsType_SRV		= 33,	//< Location of Services (RFC-2782)

	EDnsType_NAPTR		= 35,	//< Naming Authority Pointer (RFC-2915)

    EDnsQType_Any       = 255   //< Request for all records

	};

//mDNS Class Types

enum TDnsClass

	{

    EDnsClass_IN = 1,       //< public final static Internet

    EDnsClass_CS = 2,        //< CSNET

    EDnsClass_CH= 3,         //< CHAOS

    EDnsClass_HS = 4,       //< Hesiod

    EDnsClass_NONE = 254,	 //< Used in DNS UPDATE [RFC 2136]

    EDnsClass_ANY = 255    //< Not a DNS class, but a DNS query class, meaning "all classes"

	};

//Flags

enum TFlags

	{

	EFlagReserved = 0x0070,

	EFlagRecursionAvailable = 0x0080,

	EFlagRecurse = 0x0100,

	EFlagTruncated = 0x0200,

	EFlagAuthoritative = 0x0400,

	EFlagOpcode = 0x0F00,

	EFlagQuery = 0x8000,

	EFlagResponseCode = 0x000F		

	};

// Response Codes

enum TDnsRcode

	{

    EDnsRcode_NOERROR		    = 0,

	EDnsRcode_FORMAT_ERROR	    = 1,

	EDnsRcode_SERVER_FAILURE	= 2,

	EDnsRcode_NAME_ERROR		= 3,

	EDnsRcode_NOT_IMPLEMENTED	= 4,

	EDnsRcode_REFUSED			= 5

	};

#endif //__DNSCONSTANTS_H__