public ServerSessionDecoder(long streamPosition, int maxViaLength, int maxContentTypeLength) : base(streamPosition)
{
this.viaDecoder = new ViaStringDecoder(maxViaLength);
this.contentTypeDecoder = new ContentTypeStringDecoder(maxContentTypeLength);
this.sizeDecoder = new IntDecoder();
this.currentState = ServerSessionDecoder.State.ReadingViaRecord;
}
public int Decode(byte[] bytes, int offset, int size)
{
int num;
FramingRecordType framingRecordType;
int num1;
DecoderHelper.ValidateSize(size);
try
{
switch (this.currentState)
{
case ServerSessionDecoder.State.ReadingViaRecord:
{
framingRecordType = (FramingRecordType)bytes[offset];
base.ValidateRecordType(FramingRecordType.Via, framingRecordType);
num = 1;
this.viaDecoder.Reset();
this.currentState = ServerSessionDecoder.State.ReadingViaString;
break;
}
case ServerSessionDecoder.State.ReadingViaString:
{
num = this.viaDecoder.Decode(bytes, offset, size);
if (!this.viaDecoder.IsValueDecoded)
{
break;
}
this.currentState = ServerSessionDecoder.State.ReadingContentTypeRecord;
break;
}
case ServerSessionDecoder.State.ReadingContentTypeRecord:
{
framingRecordType = (FramingRecordType)bytes[offset];
if (framingRecordType != FramingRecordType.KnownEncoding)
{
base.ValidateRecordType(FramingRecordType.ExtensibleEncoding, framingRecordType);
num = 1;
this.contentTypeDecoder.Reset();
this.currentState = ServerSessionDecoder.State.ReadingContentTypeString;
break;
}
else
{
num = 1;
this.currentState = ServerSessionDecoder.State.ReadingContentTypeByte;
break;
}
}
case ServerSessionDecoder.State.ReadingContentTypeString:
{
num = this.contentTypeDecoder.Decode(bytes, offset, size);
if (!this.contentTypeDecoder.IsValueDecoded)
{
break;
}
this.currentState = ServerSessionDecoder.State.PreUpgradeStart;
this.contentType = this.contentTypeDecoder.Value;
break;
}
case ServerSessionDecoder.State.ReadingContentTypeByte:
{
this.contentType = ContentTypeStringDecoder.GetString((FramingEncodingType)bytes[offset]);
num = 1;
this.currentState = ServerSessionDecoder.State.PreUpgradeStart;
break;
}
case ServerSessionDecoder.State.PreUpgradeStart:
{
num = 0;
this.currentState = ServerSessionDecoder.State.ReadingUpgradeRecord;
break;
}
case ServerSessionDecoder.State.ReadingUpgradeRecord:
{
framingRecordType = (FramingRecordType)bytes[offset];
if (framingRecordType != FramingRecordType.UpgradeRequest)
{
num = 0;
this.currentState = ServerSessionDecoder.State.ReadingPreambleEndRecord;
break;
}
else
{
num = 1;
this.contentTypeDecoder.Reset();
this.currentState = ServerSessionDecoder.State.ReadingUpgradeString;
break;
}
}
case ServerSessionDecoder.State.ReadingUpgradeString:
{
num = this.contentTypeDecoder.Decode(bytes, offset, size);
if (!this.contentTypeDecoder.IsValueDecoded)
{
break;
}
this.currentState = ServerSessionDecoder.State.UpgradeRequest;
this.upgrade = this.contentTypeDecoder.Value;
break;
}
case ServerSessionDecoder.State.UpgradeRequest:
{
num = 0;
this.currentState = ServerSessionDecoder.State.ReadingUpgradeRecord;
break;
}
case ServerSessionDecoder.State.ReadingPreambleEndRecord:
{
framingRecordType = (FramingRecordType)bytes[offset];
base.ValidateRecordType(FramingRecordType.PreambleEnd, framingRecordType);
num = 1;
this.currentState = ServerSessionDecoder.State.Start;
break;
}
case ServerSessionDecoder.State.Start:
{
num = 0;
this.currentState = ServerSessionDecoder.State.ReadingEndRecord;
break;
}
case ServerSessionDecoder.State.ReadingEnvelopeRecord:
{
base.ValidateRecordType(FramingRecordType.SizedEnvelope, (FramingRecordType)bytes[offset]);
num = 1;
this.currentState = ServerSessionDecoder.State.ReadingEnvelopeSize;
this.sizeDecoder.Reset();
break;
}
case ServerSessionDecoder.State.ReadingEnvelopeSize:
{
num = this.sizeDecoder.Decode(bytes, offset, size);
if (!this.sizeDecoder.IsValueDecoded)
{
break;
}
this.currentState = ServerSessionDecoder.State.EnvelopeStart;
this.envelopeSize = this.sizeDecoder.Value;
this.envelopeBytesNeeded = this.envelopeSize;
break;
}
case ServerSessionDecoder.State.EnvelopeStart:
{
num = 0;
this.currentState = ServerSessionDecoder.State.ReadingEnvelopeBytes;
break;
}
case ServerSessionDecoder.State.ReadingEnvelopeBytes:
{
num = size;
if (num > this.envelopeBytesNeeded)
{
num = this.envelopeBytesNeeded;
}
ServerSessionDecoder serverSessionDecoder = this;
serverSessionDecoder.envelopeBytesNeeded = serverSessionDecoder.envelopeBytesNeeded - num;
if (this.envelopeBytesNeeded != 0)
{
break;
}
this.currentState = ServerSessionDecoder.State.EnvelopeEnd;
break;
}
case ServerSessionDecoder.State.EnvelopeEnd:
{
num = 0;
this.currentState = ServerSessionDecoder.State.ReadingEndRecord;
break;
}
case ServerSessionDecoder.State.ReadingEndRecord:
{
framingRecordType = (FramingRecordType)bytes[offset];
if (framingRecordType != FramingRecordType.End)
{
num = 0;
this.currentState = ServerSessionDecoder.State.ReadingEnvelopeRecord;
break;
}
else
{
num = 1;
this.currentState = ServerSessionDecoder.State.End;
break;
}
}
case ServerSessionDecoder.State.End:
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(base.CreateException(new InvalidDataException(Microsoft.ServiceBus.SR.GetString(Resources.FramingAtEnd, new object[0]))));
}
default:
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(base.CreateException(new InvalidDataException(Microsoft.ServiceBus.SR.GetString(Resources.InvalidDecoderStateMachine, new object[0]))));
}
}
ServerSessionDecoder streamPosition = this;
streamPosition.StreamPosition = streamPosition.StreamPosition + (long)num;
num1 = num;
}
catch (InvalidDataException invalidDataException)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(base.CreateException(invalidDataException));
}
return(num1);
}
public void Reset(long streamPosition)
{
base.StreamPosition = streamPosition;
this.currentState = ServerSessionDecoder.State.ReadingViaRecord;
}
