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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Channels
{
using System.IO;
using System.Runtime;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.ServiceModel.MsmqIntegration;
using System.ServiceModel.Security;
using System.Transactions;
using System.Xml;
using System.Xml.Serialization;
static class MsmqDecodeHelper
{
static ActiveXSerializer activeXSerializer;
static BinaryFormatter binaryFormatter;
const int defaultMaxViaSize = 2048;
const int defaultMaxContentTypeSize = 256;
static ActiveXSerializer ActiveXSerializer
{
get
{
if (null == activeXSerializer)
activeXSerializer = new ActiveXSerializer();
return activeXSerializer;
}
}
static BinaryFormatter BinaryFormatter
{
get
{
if (null == binaryFormatter)
binaryFormatter = new BinaryFormatter();
return binaryFormatter;
}
}
static void ReadServerMode(MsmqChannelListenerBase listener, ServerModeDecoder modeDecoder, byte[] incoming, long lookupId, ref int offset, ref int size)
{
for (;;)
{
if (size <= 0)
{
throw listener.NormalizePoisonException(lookupId, modeDecoder.CreatePrematureEOFException());
}
int decoded = modeDecoder.Decode(incoming, offset, size);
offset += decoded;
size -= decoded;
if (ServerModeDecoder.State.Done == modeDecoder.CurrentState)
break;
}
}
internal static Message DecodeTransportDatagram(MsmqInputChannelListener listener, MsmqReceiveHelper receiver, MsmqInputMessage msmqMessage, MsmqMessageProperty messageProperty)
{
using (MsmqDiagnostics.BoundReceiveBytesOperation())
{
long lookupId = msmqMessage.LookupId.Value;
int size = msmqMessage.BodyLength.Value;
int offset = 0;
byte[] incoming = msmqMessage.Body.Buffer;
ServerModeDecoder modeDecoder = new ServerModeDecoder();
try
{
ReadServerMode(listener, modeDecoder, incoming, messageProperty.LookupId, ref offset, ref size);
}
catch (ProtocolException ex)
{
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, ex);
}
if (modeDecoder.Mode != FramingMode.SingletonSized)
{
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, new ProtocolException(SR.GetString(SR.MsmqBadFrame)));
}
ServerSingletonSizedDecoder decoder = new ServerSingletonSizedDecoder(0, defaultMaxViaSize, defaultMaxContentTypeSize);
try
{
for (;;)
{
if (size <= 0)
{
throw listener.NormalizePoisonException(messageProperty.LookupId, decoder.CreatePrematureEOFException());
}
int decoded = decoder.Decode(incoming, offset, size);
offset += decoded;
size -= decoded;
if (decoder.CurrentState == ServerSingletonSizedDecoder.State.Start)
break;
}
}
catch (ProtocolException ex)
{
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, ex);
}
if (size > listener.MaxReceivedMessageSize)
{
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, MaxMessageSizeStream.CreateMaxReceivedMessageSizeExceededException(listener.MaxReceivedMessageSize));
}
if (!listener.MessageEncoderFactory.Encoder.IsContentTypeSupported(decoder.ContentType))
{
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, new ProtocolException(SR.GetString(SR.MsmqBadContentType)));
}
byte[] envelopeBuffer = listener.BufferManager.TakeBuffer(size);
Buffer.BlockCopy(incoming, offset, envelopeBuffer, 0, size);
Message message = null;
using (MsmqDiagnostics.BoundDecodeOperation())
{
try
{
message = listener.MessageEncoderFactory.Encoder.ReadMessage(
new ArraySegment<byte>(envelopeBuffer, 0, size), listener.BufferManager);
}
catch (XmlException e)
{
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, new ProtocolException(SR.GetString(SR.MsmqBadXml), e));
}
bool closeMessage = true;
try
{
SecurityMessageProperty securityProperty = listener.ValidateSecurity(msmqMessage);
if (null != securityProperty)
message.Properties.Security = securityProperty;
closeMessage = false;
MsmqDiagnostics.TransferFromTransport(message);
return message;
}
catch (Exception ex)
{
if (Fx.IsFatal(ex))
throw;
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, ex);
}
finally
{
if (closeMessage)
{
message.Close();
}
}
}
}
}
internal static IInputSessionChannel DecodeTransportSessiongram(
MsmqInputSessionChannelListener listener,
MsmqInputMessage msmqMessage,
MsmqMessageProperty messageProperty,
MsmqReceiveContextLockManager receiveContextManager)
{
using (MsmqDiagnostics.BoundReceiveBytesOperation())
{
long lookupId = msmqMessage.LookupId.Value;
int size = msmqMessage.BodyLength.Value;
int offset = 0;
byte[] incoming = msmqMessage.Body.Buffer;
MsmqReceiveHelper receiver = listener.MsmqReceiveHelper;
ServerModeDecoder modeDecoder = new ServerModeDecoder();
try
{
ReadServerMode(listener, modeDecoder, incoming, messageProperty.LookupId, ref offset, ref size);
}
catch (ProtocolException ex)
{
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, ex);
}
if (modeDecoder.Mode != FramingMode.Simplex)
{
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, new ProtocolException(SR.GetString(SR.MsmqBadFrame)));
}
MsmqInputSessionChannel channel = null;
ServerSessionDecoder sessionDecoder = new ServerSessionDecoder(0, defaultMaxViaSize, defaultMaxContentTypeSize);
try
{
for (;;)
{
if (size <= 0)
{
throw listener.NormalizePoisonException(messageProperty.LookupId, sessionDecoder.CreatePrematureEOFException());
}
int decoded = sessionDecoder.Decode(incoming, offset, size);
offset += decoded;
size -= decoded;
if (ServerSessionDecoder.State.EnvelopeStart == sessionDecoder.CurrentState)
break;
}
}
catch (ProtocolException ex)
{
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, ex);
}
MessageEncoder encoder = listener.MessageEncoderFactory.CreateSessionEncoder();
if (!encoder.IsContentTypeSupported(sessionDecoder.ContentType))
{
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, new ProtocolException(SR.GetString(SR.MsmqBadContentType)));
}
ReceiveContext receiveContext = null;
// tack on the receive context property depending on the receive mode
if (receiver.MsmqReceiveParameters.ReceiveContextSettings.Enabled)
{
receiveContext = receiveContextManager.CreateMsmqReceiveContext(msmqMessage.LookupId.Value);
}
channel = new MsmqInputSessionChannel(listener, Transaction.Current, receiveContext);
Message message = DecodeSessiongramMessage(listener, channel, encoder, messageProperty, incoming, offset, sessionDecoder.EnvelopeSize);
SecurityMessageProperty securityProperty = null;
try
{
securityProperty = listener.ValidateSecurity(msmqMessage);
}
catch (Exception ex)
{
if (Fx.IsFatal(ex))
throw;
channel.FaultChannel();
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, ex);
}
if (null != securityProperty)
message.Properties.Security = securityProperty;
message.Properties[MsmqMessageProperty.Name] = messageProperty;
channel.EnqueueAndDispatch(message);
listener.RaiseMessageReceived();
for (;;)
{
int decoded;
try
{
if (size <= 0)
{
channel.FaultChannel();
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, sessionDecoder.CreatePrematureEOFException());
}
decoded = sessionDecoder.Decode(incoming, offset, size);
}
catch (ProtocolException ex)
{
channel.FaultChannel();
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, ex);
}
offset += decoded;
size -= decoded;
if (ServerSessionDecoder.State.End == sessionDecoder.CurrentState)
break;
if (ServerSessionDecoder.State.EnvelopeStart == sessionDecoder.CurrentState)
{
message = DecodeSessiongramMessage(listener, channel, encoder, messageProperty, incoming, offset, sessionDecoder.EnvelopeSize);
if (null != securityProperty)
{
message.Properties.Security = (SecurityMessageProperty)securityProperty.CreateCopy();
}
message.Properties[MsmqMessageProperty.Name] = messageProperty;
channel.EnqueueAndDispatch(message);
listener.RaiseMessageReceived();
}
}
channel.Shutdown();
MsmqDiagnostics.SessiongramReceived(channel.Session.Id, msmqMessage.MessageId, channel.InternalPendingItems);
return channel;
}
}
static Message DecodeSessiongramMessage(
MsmqInputSessionChannelListener listener,
MsmqInputSessionChannel channel,
MessageEncoder encoder,
MsmqMessageProperty messageProperty,
byte[] buffer,
int offset,
int size)
{
if (size > listener.MaxReceivedMessageSize)
{
channel.FaultChannel();
listener.MsmqReceiveHelper.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, MaxMessageSizeStream.CreateMaxReceivedMessageSizeExceededException(listener.MaxReceivedMessageSize));
}
// Fix for CSDMain bug 17842
// size is derived from user data, check for corruption
if ((size + offset) > buffer.Length)
{
listener.MsmqReceiveHelper.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, new ProtocolException(SR.GetString(SR.MsmqBadFrame)));
}
byte[] envelopeBuffer = listener.BufferManager.TakeBuffer(size);
Buffer.BlockCopy(buffer, offset, envelopeBuffer, 0, size);
try
{
Message message = null;
using (MsmqDiagnostics.BoundDecodeOperation())
{
message = encoder.ReadMessage(new ArraySegment<byte>(envelopeBuffer, 0, size), listener.BufferManager);
MsmqDiagnostics.TransferFromTransport(message);
}
return message;
}
catch (XmlException e)
{
channel.FaultChannel();
listener.MsmqReceiveHelper.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, new ProtocolException(SR.GetString(SR.MsmqBadXml), e));
}
}
internal static Message DecodeIntegrationDatagram(MsmqIntegrationChannelListener listener, MsmqReceiveHelper receiver, MsmqIntegrationInputMessage msmqMessage, MsmqMessageProperty messageProperty)
{
using (MsmqDiagnostics.BoundReceiveBytesOperation())
{
Message message = Message.CreateMessage(MessageVersion.None, (string)null);
bool closeMessage = true;
try
{
SecurityMessageProperty securityProperty = listener.ValidateSecurity(msmqMessage);
if (null != securityProperty)
message.Properties.Security = securityProperty;
MsmqIntegrationMessageProperty integrationProperty = new MsmqIntegrationMessageProperty();
msmqMessage.SetMessageProperties(integrationProperty);
int size = msmqMessage.BodyLength.Value;
if (size > listener.MaxReceivedMessageSize)
{
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, MaxMessageSizeStream.CreateMaxReceivedMessageSizeExceededException(listener.MaxReceivedMessageSize));
}
byte[] bodyBytes = msmqMessage.Body.GetBufferCopy(size);
MemoryStream bodyStream = new MemoryStream(bodyBytes, 0, bodyBytes.Length, false);
object body = null;
using (MsmqDiagnostics.BoundDecodeOperation())
{
try
{
body = DeserializeForIntegration(listener, bodyStream, integrationProperty, messageProperty.LookupId);
}
catch (SerializationException e)
{
receiver.FinalDisposition(messageProperty);
throw listener.NormalizePoisonException(messageProperty.LookupId, new ProtocolException(SR.GetString(SR.MsmqDeserializationError), e));
}
integrationProperty.Body = body;
message.Properties[MsmqIntegrationMessageProperty.Name] = integrationProperty;
bodyStream.Seek(0, SeekOrigin.Begin);
message.Headers.To = listener.Uri;
closeMessage = false;
MsmqDiagnostics.TransferFromTransport(message);
}
return message;
}
finally
{
if (closeMessage)
message.Close();
}
}
}
static object DeserializeForIntegration(MsmqIntegrationChannelListener listener, Stream bodyStream, MsmqIntegrationMessageProperty property, long lookupId)
{
MsmqMessageSerializationFormat serializationFormat = (listener.ReceiveParameters as MsmqIntegrationReceiveParameters).SerializationFormat;
switch (serializationFormat)
{
case MsmqMessageSerializationFormat.Xml:
return XmlDeserializeForIntegration(listener, bodyStream, lookupId);
case MsmqMessageSerializationFormat.Binary:
return BinaryFormatter.Deserialize(bodyStream);
case MsmqMessageSerializationFormat.ActiveX:
int bodyType = property.BodyType.Value;
return ActiveXSerializer.Deserialize(bodyStream as MemoryStream, bodyType);
case MsmqMessageSerializationFormat.ByteArray:
return (bodyStream as MemoryStream).ToArray();
case MsmqMessageSerializationFormat.Stream:
return bodyStream;
default:
throw new SerializationException(SR.GetString(SR.MsmqUnsupportedSerializationFormat, serializationFormat));
}
}
static object XmlDeserializeForIntegration(MsmqIntegrationChannelListener listener, Stream stream, long lookupId)
{
XmlTextReader reader = new XmlTextReader(stream);
reader.WhitespaceHandling = WhitespaceHandling.Significant;
reader.DtdProcessing = DtdProcessing.Prohibit;
try
{
foreach (XmlSerializer serializer in listener.XmlSerializerList)
{
if (serializer.CanDeserialize(reader))
return serializer.Deserialize(reader);
}
}
catch (InvalidOperationException e)
{
// XmlSerializer throws InvalidOperationException on failure of Deserialize.
// We map it to SerializationException to provide consistent interface
throw new SerializationException(e.Message);
}
throw new SerializationException(SR.GetString(SR.MsmqCannotDeserializeXmlMessage));
}
}
}
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