public int Decode(byte[] buffer, int offset, int size)
{
DecoderHelper.ValidateSize(size);
int bytesConsumed;
switch (_currentState)
{
case State.ReadingSize:
bytesConsumed = _sizeDecoder.Decode(buffer, offset, size);
if (_sizeDecoder.IsValueDecoded)
{
_encodedSize = _sizeDecoder.Value;
if (_encodedSize > _sizeQuota)
{
Exception quotaExceeded = OnSizeQuotaExceeded(_encodedSize);
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(quotaExceeded);
}
if (_encodedBytes == null || _encodedBytes.Length < _encodedSize)
{
_encodedBytes = Fx.AllocateByteArray(_encodedSize);
_value = null;
}
_currentState = State.ReadingBytes;
_bytesNeeded = _encodedSize;
}
break;
case State.ReadingBytes:
if (_value != null && _valueLengthInBytes == _encodedSize && _bytesNeeded == _encodedSize &&
size >= _encodedSize && CompareBuffers(_encodedBytes, buffer, offset))
{
bytesConsumed = _bytesNeeded;
OnComplete(_value);
}
else
{
bytesConsumed = _bytesNeeded;
if (size < _bytesNeeded)
{
bytesConsumed = size;
}
Buffer.BlockCopy(buffer, offset, _encodedBytes, _encodedSize - _bytesNeeded, bytesConsumed);
_bytesNeeded -= bytesConsumed;
if (_bytesNeeded == 0)
{
_value = Encoding.UTF8.GetString(_encodedBytes, 0, _encodedSize);
_valueLengthInBytes = _encodedSize;
OnComplete(_value);
}
}
break;
default:
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(SR.InvalidDecoderStateMachine));
}
return(bytesConsumed);
}
public override int Decode(byte[] bytes, int offset, int size)
{
DecoderHelper.ValidateSize(size);
try
{
int bytesConsumed;
FramingRecordType recordType;
switch (CurrentState)
{
case ClientFramingDecoderState.ReadingUpgradeRecord:
recordType = (FramingRecordType)bytes[offset];
if (recordType == FramingRecordType.UpgradeResponse)
{
bytesConsumed = 1;
base.CurrentState = ClientFramingDecoderState.UpgradeResponse;
}
else
{
bytesConsumed = 0;
base.CurrentState = ClientFramingDecoderState.ReadingAckRecord;
}
break;
case ClientFramingDecoderState.UpgradeResponse:
bytesConsumed = 0;
base.CurrentState = ClientFramingDecoderState.ReadingUpgradeRecord;
break;
case ClientFramingDecoderState.ReadingAckRecord:
recordType = (FramingRecordType)bytes[offset];
if (recordType == FramingRecordType.Fault)
{
bytesConsumed = 1;
_faultDecoder = new FaultStringDecoder();
base.CurrentState = ClientFramingDecoderState.ReadingFaultString;
break;
}
ValidatePreambleAck(recordType);
bytesConsumed = 1;
base.CurrentState = ClientFramingDecoderState.Start;
break;
case ClientFramingDecoderState.Start:
bytesConsumed = 0;
base.CurrentState = ClientFramingDecoderState.ReadingEnvelopeRecord;
break;
case ClientFramingDecoderState.ReadingEnvelopeRecord:
recordType = (FramingRecordType)bytes[offset];
if (recordType == FramingRecordType.End)
{
bytesConsumed = 1;
base.CurrentState = ClientFramingDecoderState.End;
break;
}
else if (recordType == FramingRecordType.Fault)
{
bytesConsumed = 1;
_faultDecoder = new FaultStringDecoder();
base.CurrentState = ClientFramingDecoderState.ReadingFaultString;
break;
}
ValidateRecordType(FramingRecordType.SizedEnvelope, recordType);
bytesConsumed = 1;
base.CurrentState = ClientFramingDecoderState.ReadingEnvelopeSize;
_sizeDecoder.Reset();
break;
case ClientFramingDecoderState.ReadingEnvelopeSize:
bytesConsumed = _sizeDecoder.Decode(bytes, offset, size);
if (_sizeDecoder.IsValueDecoded)
{
base.CurrentState = ClientFramingDecoderState.EnvelopeStart;
_envelopeSize = _sizeDecoder.Value;
_envelopeBytesNeeded = _envelopeSize;
}
break;
case ClientFramingDecoderState.EnvelopeStart:
bytesConsumed = 0;
base.CurrentState = ClientFramingDecoderState.ReadingEnvelopeBytes;
break;
case ClientFramingDecoderState.ReadingEnvelopeBytes:
bytesConsumed = size;
if (bytesConsumed > _envelopeBytesNeeded)
{
bytesConsumed = _envelopeBytesNeeded;
}
_envelopeBytesNeeded -= bytesConsumed;
if (_envelopeBytesNeeded == 0)
{
base.CurrentState = ClientFramingDecoderState.EnvelopeEnd;
}
break;
case ClientFramingDecoderState.EnvelopeEnd:
bytesConsumed = 0;
base.CurrentState = ClientFramingDecoderState.ReadingEnvelopeRecord;
break;
case ClientFramingDecoderState.ReadingFaultString:
bytesConsumed = _faultDecoder.Decode(bytes, offset, size);
if (_faultDecoder.IsValueDecoded)
{
base.CurrentState = ClientFramingDecoderState.Fault;
}
break;
case ClientFramingDecoderState.Fault:
bytesConsumed = 0;
base.CurrentState = ClientFramingDecoderState.ReadingEndRecord;
break;
case ClientFramingDecoderState.ReadingEndRecord:
ValidateRecordType(FramingRecordType.End, (FramingRecordType)bytes[offset]);
bytesConsumed = 1;
base.CurrentState = ClientFramingDecoderState.End;
break;
case ClientFramingDecoderState.End:
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
CreateException(new InvalidDataException(SRServiceModel.FramingAtEnd)));
default:
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
CreateException(new InvalidDataException(SRServiceModel.InvalidDecoderStateMachine)));
}
StreamPosition += bytesConsumed;
return(bytesConsumed);
}
catch (InvalidDataException e)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateException(e));
}
}
public int Decode(byte[] bytes, int offset, int size)
{
DecoderHelper.ValidateSize(size);
try
{
int bytesConsumed;
switch (_currentState)
{
case State.ReadingEnvelopeChunkSize:
bytesConsumed = _sizeDecoder.Decode(bytes, offset, size);
if (_sizeDecoder.IsValueDecoded)
{
_chunkSize = _sizeDecoder.Value;
_sizeDecoder.Reset();
if (_chunkSize == 0)
{
_currentState = State.EnvelopeEnd;
}
else
{
_currentState = State.ChunkStart;
_chunkBytesNeeded = _chunkSize;
}
}
break;
case State.ChunkStart:
bytesConsumed = 0;
_currentState = State.ReadingEnvelopeBytes;
break;
case State.ReadingEnvelopeBytes:
bytesConsumed = size;
if (bytesConsumed > _chunkBytesNeeded)
{
bytesConsumed = _chunkBytesNeeded;
}
_chunkBytesNeeded -= bytesConsumed;
if (_chunkBytesNeeded == 0)
{
_currentState = State.ChunkEnd;
}
break;
case State.ChunkEnd:
bytesConsumed = 0;
_currentState = State.ReadingEnvelopeChunkSize;
break;
case State.EnvelopeEnd:
ValidateRecordType(FramingRecordType.End, (FramingRecordType)bytes[offset]);
bytesConsumed = 1;
_currentState = State.End;
break;
case State.End:
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
CreateException(new InvalidDataException(SRServiceModel.FramingAtEnd)));
default:
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
CreateException(new InvalidDataException(SRServiceModel.InvalidDecoderStateMachine)));
}
StreamPosition += bytesConsumed;
return(bytesConsumed);
}
catch (InvalidDataException e)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(CreateException(e));
}
}
private ArraySegment <byte> ExtractSessionInformationFromMessage(ArraySegment <byte> messageData)
{
int num3;
int num4;
if (this.isReaderSessionInvalid)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(System.ServiceModel.SR.GetString("BinaryEncoderSessionInvalid")));
}
byte[] array = messageData.Array;
bool flag = true;
try
{
IntDecoder decoder = new IntDecoder();
int num2 = decoder.Decode(array, messageData.Offset, messageData.Count);
int num = decoder.Value;
if (num > messageData.Count)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(System.ServiceModel.SR.GetString("BinaryEncoderSessionMalformed")));
}
num3 = (messageData.Offset + num2) + num;
num4 = (messageData.Count - num2) - num;
if (num4 < 0)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(System.ServiceModel.SR.GetString("BinaryEncoderSessionMalformed")));
}
if (num > 0)
{
if (num > this.remainingReaderSessionSize)
{
string message = System.ServiceModel.SR.GetString("BinaryEncoderSessionTooLarge", new object[] { this.maxSessionSize });
Exception innerException = new QuotaExceededException(message);
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new CommunicationException(message, innerException));
}
this.remainingReaderSessionSize -= num;
int size = num;
int offset = messageData.Offset + num2;
while (size > 0)
{
decoder.Reset();
int num7 = decoder.Decode(array, offset, size);
int count = decoder.Value;
offset += num7;
size -= num7;
if (count > size)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(System.ServiceModel.SR.GetString("BinaryEncoderSessionMalformed")));
}
string str2 = Encoding.UTF8.GetString(array, offset, count);
offset += count;
size -= count;
this.readerSession.Add(this.idCounter, str2);
this.idCounter++;
}
}
flag = false;
}
finally
{
if (flag)
{
this.isReaderSessionInvalid = true;
}
}
return(new ArraySegment <byte>(array, num3, num4));
}
private ArraySegment<byte> ExtractSessionInformationFromMessage(ArraySegment<byte> messageData)
{
if (_isReaderSessionInvalid)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(SR.BinaryEncoderSessionInvalid));
}
byte[] buffer = messageData.Array;
int dictionarySize;
int headerSize;
int newOffset;
int newSize;
bool throwing = true;
try
{
IntDecoder decoder = new IntDecoder();
headerSize = decoder.Decode(buffer, messageData.Offset, messageData.Count);
dictionarySize = decoder.Value;
if (dictionarySize > messageData.Count)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(SR.BinaryEncoderSessionMalformed));
}
newOffset = messageData.Offset + headerSize + dictionarySize;
newSize = messageData.Count - headerSize - dictionarySize;
if (newSize < 0)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(SR.BinaryEncoderSessionMalformed));
}
if (dictionarySize > 0)
{
if (dictionarySize > _remainingReaderSessionSize)
{
string message = SR.Format(SR.BinaryEncoderSessionTooLarge, _maxSessionSize);
if (WcfEventSource.Instance.MaxSessionSizeReachedIsEnabled())
{
WcfEventSource.Instance.MaxSessionSizeReached(message);
}
Exception inner = new QuotaExceededException(message);
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new CommunicationException(message, inner));
}
else
{
_remainingReaderSessionSize -= dictionarySize;
}
int size = dictionarySize;
int offset = messageData.Offset + headerSize;
while (size > 0)
{
decoder.Reset();
int bytesDecoded = decoder.Decode(buffer, offset, size);
int utf8ValueSize = decoder.Value;
offset += bytesDecoded;
size -= bytesDecoded;
if (utf8ValueSize > size)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(SR.BinaryEncoderSessionMalformed));
}
string value = Encoding.UTF8.GetString(buffer, offset, utf8ValueSize);
offset += utf8ValueSize;
size -= utf8ValueSize;
_readerSession.Add(_idCounter, value);
_idCounter++;
}
}
throwing = false;
}
finally
{
if (throwing)
{
_isReaderSessionInvalid = true;
}
}
return new ArraySegment<byte>(buffer, newOffset, newSize);
}
private ArraySegment<byte> ExtractSessionInformationFromMessage(ArraySegment<byte> messageData)
{
int num3;
int num4;
if (this.isReaderSessionInvalid)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(System.ServiceModel.SR.GetString("BinaryEncoderSessionInvalid")));
}
byte[] array = messageData.Array;
bool flag = true;
try
{
IntDecoder decoder = new IntDecoder();
int num2 = decoder.Decode(array, messageData.Offset, messageData.Count);
int num = decoder.Value;
if (num > messageData.Count)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(System.ServiceModel.SR.GetString("BinaryEncoderSessionMalformed")));
}
num3 = (messageData.Offset + num2) + num;
num4 = (messageData.Count - num2) - num;
if (num4 < 0)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(System.ServiceModel.SR.GetString("BinaryEncoderSessionMalformed")));
}
if (num > 0)
{
if (num > this.remainingReaderSessionSize)
{
string message = System.ServiceModel.SR.GetString("BinaryEncoderSessionTooLarge", new object[] { this.maxSessionSize });
Exception innerException = new QuotaExceededException(message);
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new CommunicationException(message, innerException));
}
this.remainingReaderSessionSize -= num;
int size = num;
int offset = messageData.Offset + num2;
while (size > 0)
{
decoder.Reset();
int num7 = decoder.Decode(array, offset, size);
int count = decoder.Value;
offset += num7;
size -= num7;
if (count > size)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidDataException(System.ServiceModel.SR.GetString("BinaryEncoderSessionMalformed")));
}
string str2 = Encoding.UTF8.GetString(array, offset, count);
offset += count;
size -= count;
this.readerSession.Add(this.idCounter, str2);
this.idCounter++;
}
}
flag = false;
}
finally
{
if (flag)
{
this.isReaderSessionInvalid = true;
}
}
return new ArraySegment<byte>(array, num3, num4);
}