--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/natfw/natfwunsaf_protocols/unsaf_codec/inc/natfwunsaftcprelaypacket.h Tue Feb 02 01:04:58 2010 +0200
@@ -0,0 +1,178 @@
+/*
+* Copyright (c) 2006-2007 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 CNATFWUNSAFTCPRELAYPACKET_H
+#define CNATFWUNSAFTCPRELAYPACKET_H
+
+#include <e32base.h>
+
+/**
+* A class for UNSAF TCP relay packets
+*
+* @lib natfwunsafprotocols.lib
+* @since S60 3.2
+*/
+class CNATFWUNSAFTcpRelayPacket : public CBase
+ {
+public: // Enumerations
+
+ enum TFrame // draft-ietf-behave-turn-02
+ {
+ EFrameTypeOffset = 0,
+ EFrameLengthOffset = 2,
+
+ EFrameTypePrefixMask = 0xff00,
+ EFrameSize = 4
+ };
+
+ enum TRelayType
+ {
+ EFrameTypeStun = 0x02,
+ EFrameTypeData = 0x03,
+ };
+
+public: // Constructors and destructor
+
+ /**
+ * Creates a CNATFWUNSAFTcpRelayPacket instance
+ * @param aData Data to be relayed
+ * @param aType Type of relay (STUN/DATA)
+ * @return A new instance of CNATFWUNSAFTcpRelayPacket
+ */
+ IMPORT_C static CNATFWUNSAFTcpRelayPacket*
+ NewL(const TDesC8& aData, const TRelayType aType);
+
+ /**
+ * Creates a CNATFWUNSAFTcpRelayPacket instance
+ * @param aData Data to be relayed
+ * @param aType Type of relay (STUN/DATA)
+ * @return A new instance of CNATFWUNSAFTcpRelayPacket
+ */
+ IMPORT_C static CNATFWUNSAFTcpRelayPacket*
+ NewLC(const TDesC8& aData, const TRelayType aType);
+
+ /**
+ * Creates a CNATFWUNSAFTcpRelayPacket instance.
+ * @param aData Data to be relayed
+ * @param aType Type of relay (STUN/DATA)
+ * @return A new instance of CNATFWUNSAFTcpRelayPacket
+ * ownership is transferred.
+ */
+ static CNATFWUNSAFTcpRelayPacket*
+ CreateL(const TDesC8& aData, const TRelayType aType);
+
+ /**
+ * Destructor, deletes the resources of CNATFWUNSAFTcpRelayPacket.
+ */
+ virtual ~CNATFWUNSAFTcpRelayPacket();
+
+public: // New functions
+
+ /**
+ * Encodes a relay packet
+ * @return The encoded UNSAF TCP relay packet. The ownership is
+ * transferred.
+ */
+ IMPORT_C CBufBase* EncodeL() const;
+
+ /**
+ * Returns the relayed data
+ * @return relayed data
+ */
+ IMPORT_C const TDesC8& Data() const;
+
+ /**
+ * Returns the relay type
+ * @return relay type
+ */
+ IMPORT_C TRelayType Type() const;
+
+ /**
+ * Retrieves the UNSAF TCP relay packet length from a UNSAF TCP relay
+ * packet header.
+ * @param aNATFWUNSAFTcpRelayPacket a UNSAF TCP relay packet
+ * @return KErrNotFound if length field cannot be parsed.
+ * Otherwise the value of the length field.
+ */
+ static TInt RelayLength(const TDesC8& aNATFWUNSAFTcpRelayPacket);
+
+ /**
+ * Writes the length field into WUNSAF TCP relay packet header.
+ * @param aNATFWUNSAFTcpRelayPacket Encoded UNSAF TCP relay packet
+ * whose length is to be calculated and written.
+ */
+ static void SetRelayLength(CBufBase& aNATFWUNSAFTcpRelayPacket);
+
+ /**
+ * Writes the length field into NATFWUNSAF TCP relay packet header.
+ * @param aNATFWUNSAFTcpRelayPacket Encoded UNSAF TCP relay packet whose
+ * length is to be set.
+ * @param aLength Value to write into the length field.
+ */
+ static void SetRelayLength(CBufBase& aNATFWUNSAFTcpRelayPacket,
+ TInt aLength);
+
+protected: // Constructors
+
+ CNATFWUNSAFTcpRelayPacket();
+
+ /**
+ * Second phase constructor.
+ * @param aData data to be relayed
+ * @param aType type of relay (STUN/DATA)
+ */
+ void ConstructL(const TDesC8& aData, const TRelayType aType);
+
+private:
+
+ /**
+ * Encodes the UNSAF TCP relay packet header.
+ * @return The encoded UNSAF relay packet header. The ownership is
+ * transferred.
+ */
+ CBufBase* EncodeRelayHeaderLC() const;
+
+ /**
+ * Checks that the length of relayed data is valid
+ * @param aLength Length of the relayed data
+ * @leave KErrCorrupt If the length is invalid
+ */
+ void CheckLengthL(TInt aLength) const;
+
+private: // Data
+
+ //Relayed data, owned
+ HBufC8* iData;
+
+ //Relay type
+ TRelayType iType;
+
+private:
+
+ enum TValueDataGranularity
+ {
+ //The length of iValue has to be a multiple of 4
+ EGranularity = 4
+ };
+ };
+
+#endif // CNATFWUNSAFTCPRELAYPACKET_H
+
+