author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 01:04:58 +0200 | |
changeset 0 | 1bce908db942 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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#include "natfwunsaffingerprintattribute.h" |
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#include "natfwunsafmessage.h" |
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#include "natfwunsafutils.h" |
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#include "natfwunsaflog.h" |
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::DecodeL |
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// ----------------------------------------------------------------------------- |
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// |
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CNATFWUNSAFFingerprintAttribute* |
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CNATFWUNSAFFingerprintAttribute::DecodeL(const TDesC8& aValue) |
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{ |
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CNATFWUNSAFFingerprintAttribute* self = |
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new (ELeave) CNATFWUNSAFFingerprintAttribute(); |
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CleanupStack::PushL(self); |
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self->DecodeValueL(aValue); |
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CleanupStack::Pop(self); |
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return self; |
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} |
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::NewL |
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// ----------------------------------------------------------------------------- |
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// |
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CNATFWUNSAFFingerprintAttribute* |
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CNATFWUNSAFFingerprintAttribute::NewL(CBufBase& aNATFWUNSAFMessage) |
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{ |
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CNATFWUNSAFFingerprintAttribute* self = |
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CNATFWUNSAFFingerprintAttribute::NewLC(aNATFWUNSAFMessage); |
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CleanupStack::Pop(self); |
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return self; |
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} |
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::NewLC |
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// ----------------------------------------------------------------------------- |
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// |
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CNATFWUNSAFFingerprintAttribute* |
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CNATFWUNSAFFingerprintAttribute::NewLC(CBufBase& aNATFWUNSAFMessage) |
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{ |
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CNATFWUNSAFFingerprintAttribute* self = |
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new (ELeave) CNATFWUNSAFFingerprintAttribute(); |
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CleanupStack::PushL(self); |
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self->ConstructL(aNATFWUNSAFMessage); |
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return self; |
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} |
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::DecodeAttributeL |
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// ----------------------------------------------------------------------------- |
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// |
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CNATFWUNSAFAttribute* |
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CNATFWUNSAFFingerprintAttribute::DecodeAttributeL( |
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const TDesC8& aByteStream) |
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{ |
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CheckLengthL(aByteStream); |
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return DecodeL(aByteStream.Mid(EValueOffset)); |
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} |
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::CNATFWUNSAFFingerprintAttribute |
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// ----------------------------------------------------------------------------- |
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// |
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CNATFWUNSAFFingerprintAttribute::CNATFWUNSAFFingerprintAttribute() |
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{ |
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} |
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::ConstructL |
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// Update message header's length field to include the FINGERPRINT before |
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// computing the CRC-32. |
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// ----------------------------------------------------------------------------- |
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// |
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void CNATFWUNSAFFingerprintAttribute::ConstructL(CBufBase& aNATFWUNSAFMessage) |
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{ |
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__ASSERT_ALWAYS(aNATFWUNSAFMessage.Size(), User::Leave(KErrArgument)); |
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TInt length = CNATFWUNSAFMessage::MessageLength(aNATFWUNSAFMessage.Ptr(0)); |
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CNATFWUNSAFMessage::SetMessageLength(aNATFWUNSAFMessage, |
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length + EValueOffset + EAttributeValueSize); |
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ComputeCRC32(aNATFWUNSAFMessage, iCRC); |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::~CNATFWUNSAFFingerprintAttribute |
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// ----------------------------------------------------------------------------- |
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// |
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CNATFWUNSAFFingerprintAttribute::~CNATFWUNSAFFingerprintAttribute() |
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{ |
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} |
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113 |
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::Type |
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// ----------------------------------------------------------------------------- |
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// |
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CNATFWUNSAFAttribute::TType CNATFWUNSAFFingerprintAttribute::Type() const |
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{ |
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return EFingerprint; |
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} |
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122 |
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::EncodeValueL |
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// ----------------------------------------------------------------------------- |
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126 |
// |
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HBufC8* CNATFWUNSAFFingerprintAttribute::EncodeValueL() const |
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{ |
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HBufC8* encodedValue = HBufC8::NewLC(EAttributeValueSize); |
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130 |
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TPtr8 ptr = encodedValue->Des(); |
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ptr.FillZ(EAttributeValueSize); |
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133 |
|
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TUint32 value(iCRC); |
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NATFWUNSAFUtils::WriteNetworkOrder32L(ptr, 0, value); |
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136 |
|
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CleanupStack::Pop(encodedValue); |
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return encodedValue; |
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} |
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140 |
|
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::CheckLengthL |
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// This attribute has a fixed length |
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// ----------------------------------------------------------------------------- |
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// |
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void CNATFWUNSAFFingerprintAttribute::CheckLengthL( |
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const TDesC8& aByteStream) |
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{ |
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__ASSERT_ALWAYS(ParseLengthL(aByteStream) == EAttributeValueSize, |
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User::Leave(KErrCorrupt)); |
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} |
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152 |
|
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::CheckFingerprintL |
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// Exclude FINGERPRINT attribute from CRC-32 computing. It is located at the |
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// end of the message. |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C TBool CNATFWUNSAFFingerprintAttribute::CheckFingerprintL( |
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const TDesC8& aNATFWUNSAFMessage) const |
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{ |
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TInt KFingerprintSize = static_cast<TInt>(EValueOffset) + |
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static_cast<TInt>(EAttributeValueSize); |
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//Check there is enough data |
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__ASSERT_ALWAYS(aNATFWUNSAFMessage.Length() >= KFingerprintSize, |
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User::Leave(KErrArgument)); |
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167 |
|
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CBufBase* message = CBufFlat::NewL( |
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aNATFWUNSAFMessage.Length() - KFingerprintSize); |
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CleanupStack::PushL(message); |
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message->InsertL(0, |
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aNATFWUNSAFMessage, |
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aNATFWUNSAFMessage.Length() - KFingerprintSize); |
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174 |
|
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TUint32 crc(0); |
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ComputeCRC32(*message, crc); |
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|
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TBool match = (crc == iCRC); |
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NATFWUNSAF_INTLOG("Checking FINGERPRINT, match", match) |
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|
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CleanupStack::PopAndDestroy(message); |
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return match; |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::DecodeValueL |
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// ----------------------------------------------------------------------------- |
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// |
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void CNATFWUNSAFFingerprintAttribute::DecodeValueL(const TDesC8& aValue) |
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{ |
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__ASSERT_ALWAYS(aValue.Length() == EAttributeValueSize, |
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User::Leave(KErrCorrupt)); |
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iCRC = BigEndian::Get32(aValue.Ptr()); |
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} |
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195 |
|
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// ----------------------------------------------------------------------------- |
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// CNATFWUNSAFFingerprintAttribute::ComputeCRC32 |
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// ----------------------------------------------------------------------------- |
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199 |
// |
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void CNATFWUNSAFFingerprintAttribute::ComputeCRC32( |
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CBufBase& aNATFWUNSAFMessage, |
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TUint32& aCRC) const |
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{ |
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// Perform the CCITT CRC-32 checksum on the message |
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Mem::Crc32(aCRC, aNATFWUNSAFMessage.Ptr(0).Ptr(), |
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sizeof(aNATFWUNSAFMessage)); |
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// XOR according to RFC3489-bis05 |
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aCRC ^= EXORedValue; |
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} |