/*

* Copyright (c) 2003-2009 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:

* Name          : SdpOriginField.h

* Part of       : SDP Codec

* Interface     : SDK API, SDP Codec API

* Version       : 1.0

*

*/

#ifndef CSDPORIGINFIELD_H

#define CSDPORIGINFIELD_H

//  INCLUDES

#include <e32base.h>

#include <in_sock.h>

#include <stringpool.h>

//  CONSTANTS

const TInt KMaxAddressLength = 256;

//  FORWARD DECLARATIONS

class RReadStream;

class RWriteStream;

class CSdpOriginFieldPtrs;

// CLASS DECLARATION

/**

 *  @publishedAll

 *  @released

 *

 *	This class encapsulates the origin field of 

 *  the Session Description Protocol.

 * 

 *	The normative reference for correct formatting and values is

 *	draft-ietf-mmusic-sdp-new-14 unless specified otherwise in

 *  member documentation. The implementation supports this normative

 *  reference, but does not enforce it fully. 

 *

 *  @lib sdpcodec.lib

 */

class CSdpOriginField : public CBase

	{

    public:     // Constructors and destructor

        /**

         *	Constructs a new origin field.

		 *		 

         *	@param aText A string containing a correctly 

         *         formatted field value terminated by a CRLF.

         *	@return a new instance.

         */

		IMPORT_C static	CSdpOriginField* DecodeL( const TDesC8& aText );

        /**

         *	Constructs a new origin field and adds the pointer to the cleanup 

         *  stack.

		 * 		

         *	@param aText A string containing a correctly 

         *         formatted field value terminated by a CRLF.

         *	@return a new instance.

         */

		IMPORT_C static	CSdpOriginField* DecodeLC( const TDesC8& aText );

        /**

         *	Constructs a new origin field.

		 *	         

         *	@param aUserName A valid user name value.

         *	@param aSessionId A valid session id value.

         *	@param aSessionVersion A valid announcement version value.

         *	@param aAddress A unicast IP address from either

		 *         KAfInet or KAfInet6 family.

         *	@return a new instance.

         */

		IMPORT_C static	CSdpOriginField* NewL( const TDesC8& aUserName, 

											   TInt64 aSessionId, 

											   TInt64 aSessionVersion, 

											   TInetAddr& aAddress );

        /**

         *	Constructs a new origin field and adds the pointer to the cleanup 

         *  stack.

		 *	         

         *	@param aUserName A valid user name value.

         *	@param aSessionId A valid session id value.

         *	@param aSessionVersion A valid announcement version value.

         *	@param aAddress A unicast IP address from either

		 *         KAfInet or KAfInet6 family.

         *	@return a new instance.

         */

		IMPORT_C static	CSdpOriginField* NewLC( const TDesC8& aUserName, 

											    TInt64 aSessionId, 

											    TInt64 aSessionVersion, 

											    TInetAddr& aAddress );

		/**

         *	Constructs a new origin field.

		 *	

         *	@param aUserName A valid user name value.

         *	@param aSessionId A valid session id value.

         *	@param aSessionVersion A valid announcement version value.

         *	@param aNetType A valid network type value (typically "IN").

		 *  @param aAddressType A valid address type value 

		 *         (typically "IP4" or "IP6").

		 *	@param aAddress A unicast IP Address, Fully 

         *         Qualified Domain Name (FQDN), or an other type of 

         *         address allowed for the address type.

         *	@return a new instance.

         */

		IMPORT_C static	CSdpOriginField* NewL( const TDesC8& aUserName, 

											TInt64 aSessionId, 

											TInt64 aSessionVersion, 

											RStringF aNetType, 

											RStringF aAddressType, 

											const TDesC8& aAddress );

		/**

         *	Constructs a new origin field and adds the pointer to the cleanup 

         *  stack.

		 *	

         *	@param aUserName A valid user name value.

         *	@param aSessionId A valid session id value.

         *	@param aSessionVersion A valid announcement version value.

         *	@param aNetType A valid network type value (typically "IN").

		 *  @param aAddressType A valid address type value 

		 *         (typically "IP4" or "IP6").

		 *	@param aAddress A unicast IP Address, Fully Qualified Domain

		 *         Name (FQDN), or an other type of address allowed

		 *         for the address type.

         *	@return a new instance.

         */

		IMPORT_C static	CSdpOriginField* NewLC( const TDesC8& aUserName, 

											TInt64 aSessionId, 

											TInt64 aSessionVersion, 

											RStringF aNetType, 

											RStringF aAddressType, 

											const TDesC8& aAddress );

		/**

		 *	Deletes the resources held by the instance.

		 */

		IMPORT_C ~CSdpOriginField();

    public: // New functions

		/**

		 *	Outputs the field formatted according to SDP syntax and including

		 *  the terminating CRLF.

		 * 

		 *	@param aStream Stream used for output. On return 

         *         the stream includes correctly formatted origin field.

		 */

		IMPORT_C void EncodeL( RWriteStream& aStream ) const;

		/**

    	 *	Creates a new instance that is equal to the target.

		 *

		 *	@return a new instance.

		 */

		IMPORT_C CSdpOriginField* CloneL() const;

		/**	

		 *	Compares this instance to another for equality.

		 *

		 *	@param aObj The instance to compare to.

		 *	@return ETrue if equal, EFalse if not.

		 */

		IMPORT_C TBool operator == ( const CSdpOriginField& aObj ) const;

		/**

		 *	Gets the user name.

		 *

		 *	@return User name.

		 */

		IMPORT_C const TDesC8& UserName() const;

		/**

		 *	Sets the user name.

		 *

		 *	@param aValue A valid user name value.

		 *	@leave KErrSdpCodecOriginField if aValue is not a valid user name.

		 */

		IMPORT_C void SetUserNameL( const TDesC8& aValue );

		/**

		 *	Gets the session id of the origin field.

		 *  

		 *	@return Session id.

		 */

		IMPORT_C TInt64 SessionId() const;

		/**

		 *	Sets the session id.

		 *

		 *	@param aValue A valid session id value.

		 */

		IMPORT_C void SetSessionId( TInt64 aValue );

		/**

		 *	Gets the announcement version.

		 *	

		 *	@return Version.

		 */

		IMPORT_C TInt64 Version() const;

		/**

		 *	Sets the announcement version..

		 *

		 *	@param aValue A valid version value.

		 */

		IMPORT_C void SetVersion( TInt64 aValue );

		/**

		 *	Gets the network type.

		 *

		 *	@return The network type from pre-defined SDP string 

         *          table or given by the user.

		 */

		IMPORT_C RStringF NetType() const;

		/**

		 *	Gets the address type.

		 *

		 *	@return The address type from pre-defined SDP string 

         *          table or given by the user.

		 */

		IMPORT_C RStringF AddressType() const;

		/**

		 *	Gets the address.

		 *

		 *	@return Address as an IP address or null if it is

		 *          not an IP address. This may be e.g. when the address has 

		 *          been specified as a FQDN. In this case, the address can be 

		 *          accessed using the other getters.

		 */

		IMPORT_C const TInetAddr* InetAddress() const;

		/**

		 *	Gets the address.

		 *

		 *  @return Address as a string.

		 */

		IMPORT_C const TDesC8& Address() const;

		/**

		 *	Sets the address, network and address type.

		 *	Also sets the network type to "IN" and address type to "IP4" or 

		 *  "IP6" depending on the address family of aValue.

		 *

         *	@param aValue A unicast IP address from either KAfInet 

         *         or KAfInet6 family.

		 */

		IMPORT_C void SetInetAddress( const TInetAddr& aValue );

		/**

		 *	Sets the address, network and address type.

		 *

		 *	@param aAddress A unicast IP Address, Fully Qualified Domain

		 *         Name (FQDN), or an other type of address allowed for the

		 *         address type.

         *	@param aNetType A valid network type value (typically "IN").

		 *  @param aAddressType A valid address type value 

		 *         (typically "IP4" or "IP6").

		 *	@leave KErrSdpCodecOriginField if aNetType or aAddressType are not

		 *		   valid tokens, or aAddress is invalid, or aAddress type 

		 *		   is not aligned with the address format

		 */

		IMPORT_C void SetAddressL( const TDesC8& aAddress, 

								   RStringF aNetType, 

								   RStringF aAddressType );

    public:     // Internal to codec

        /**

         *  Externalizes the object to stream

         *

         *  @param aStream Stream where the object's state will be stored

         */

		void ExternalizeL( RWriteStream& aStream ) const;

        /**

         *  Creates object from the stream data

         *

         *  @param aStream Stream where the object's state will be read	

         *  @return Initialized object

         */

		static CSdpOriginField* InternalizeL( RReadStream& aStream );

	private:    // Constructors

        /**

         *  Constructor

         */

		CSdpOriginField();

        /**

         *  Second phase constructor. Parses the text string and initializes

         *  the member variables

         *         

         *  @param aText Line of text that will be parsed (ends on the newline)

         */

		void ConstructL( const TDesC8& aText );

        /**

         *  Second phase constructor. Constructs the object.

         *

         *  @param aUserName  A valid user name value.

         *  @param aSessionId A valid session id value.

         *  @param aSessionVersion A valid announcement version value.

         *  @param aAddress A unicast IP address from either

		 *                  KAfInet or KAfInet6 family.        

         */

		void ConstructL( const TDesC8& aUserName, 

						 TInt64 aSessionId, 

                         TInt64 aSessionVersion, 

						 TInetAddr& aUnicastAddress );

        /**                        

         *	Second phase constructor. Constructs the object.

		 *	

         *	@param aUserName  A valid user name value.

         *	@param aSessionId A valid session id value.

         *	@param aSessionVersion A valid announcement version value.

         *	@param aNetType A valid network type value (typically "IN").

		 *  @param aAddressType A valid address type value 

		 *         (typically "IP4" or "IP6").

		 *	@param aAddress A unicast IP Address, Fully Qualified Domain

		 *         Name (FQDN), or an other type of address allowed

		 *         for the address type.

         */

        void ConstructL( const TDesC8& aUserName, 

	                     TInt64 aSessionId, 

	                     TInt64 aSessionVersion, 

	                     RStringF aNetType, 

					     RStringF aAddressType, 

	                     const TDesC8& aAddress );

        // These are unnecessary? Derived from CBase, prevents the use

		CSdpOriginField( const CSdpOriginField& ); // Hidden.

		CSdpOriginField& operator = ( const CSdpOriginField& ); // Hidden

    private:        // New methods

        /**

         *  Checks if the given address is valid

         *

         *  @param aAddress Address to be checked

         *  @return Valid address or not

         */

        TBool IsValidAddress( const TDesC8& aAddress ) const;   

        /**

         *  Checks if the given address is valid

         *

         *  @param aAddr Address to be checked

         *  @return Valid address or not

         */             

        TBool IsValidAddress( const TInetAddr& addr ) const;

        /**

         *  Checks that address type matches with address format

         *

         *  @param aAddress Address

         *  @param aType Address type

         *  @param aPool String pool

         *  @return Type Matches with format or not

         */

        TBool TypeMatchesWithFormat( 

            const TDesC8& aAddress, const TDesC8& aType, 

            RStringPool aPool ) const;

        /**

         *  Checks if the given username is valid

         *

         *  @param aUserName Username

         *  @return Validity of the given username

         */

        TBool IsValidUserName( const TDesC8& aUserName ) const;

        /**

         *  Parses username, initializes iUserName

         *

         *  @param aArray Array containing all the elements

         */

        void ParseUserNameL( RArray<TPtrC8>& aArray );

        /**

         *  Parses session ID and version, initializes iSessionId

         *  and iSessionVersion

         *

         *  @param aArray Array containing all the elements

         */

        void ParseSessionIDAndVersionL( RArray<TPtrC8>& aArray );

        /**

         *  Parses network type and address type, initializes

         *  iNetType and iAddressType

         *

         *  @param aArray Array containing all the elements

         */

       void ParseNetTypeAndAddressTypeL( RArray<TPtrC8>& aArray );

        /**

         *  Parses address, checks address against address type,

         *  initializes iAddress

         *

         *  @param aArray Array containing all the elements

         */

        void ParseAddressL( RArray<TPtrC8>& aArray );

		inline CSdpOriginFieldPtrs& OriginFieldPtrs();

		inline const CSdpOriginFieldPtrs& OriginFieldPtrs() const;

		TInt64 Get63Msbs( const TDesC8& aDecimalValue ) const;

		void SetIPAddressType( const TInetAddr& aAddr );

    private:    // Data

        RStringPool iPool;

        // <username>

		HBufC8* iUserName;

        // <session id>

		TInt64 iSessionId;

        // <version>

		TInt64 iSessionVersion;

        // <net type>

        RStringF iNetType;

        // <address type>        

        RStringF iAddressType;

        // <address>

        // Either one is used (this or iAddressType/iAddress combo)

        // Can be defined as mutable because this variable does not affect

        // to the state of the object, but it is needed as const pointer

        // is returned on InetAddr() method

		mutable TInetAddr iUnicastAddress;        

        TBuf8<KMaxAddressLength> iAddress; 

        // For configuring the address into TInetAddr

        TBuf<KMaxAddressLength> iAddress16;          

		void __DbgTestInvariant() const;

	};

#endif // CSDPORIGINFIELD_H