--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/zeroconf/dnsparser/inc/dnsconstants.h	Thu Jun 24 19:09:47 2010 +0530
@@ -0,0 +1,123 @@
+/*
+* 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__
+