/// <summary>
/// Encode Network Message Header
/// </summary>
/// <param name="decoder"></param>
private void DecodeNetworkMessageHeader(BinaryDecoder decoder)
{
// byte[0..3] UADPVersion value 1 (for now)
// byte[4..7] UADPFlags
byte versionFlags = decoder.ReadByte("VersionFlags");
UADPVersion = (byte)(versionFlags & kUADPVersionBitMask);
// Decode UADPFlags
UADPFlags = (UADPFlagsEncodingMask)(versionFlags & 0xF0);
// Decode the ExtendedFlags1
if ((UADPFlags & UADPFlagsEncodingMask.ExtendedFlags1) != 0)
{
ExtendedFlags1 = (ExtendedFlags1EncodingMask)decoder.ReadByte("ExtendedFlags1");
}
// Decode the ExtendedFlags2
if ((ExtendedFlags1 & ExtendedFlags1EncodingMask.ExtendedFlags2) != 0)
{
ExtendedFlags2 = (ExtendedFlags2EncodingMask)decoder.ReadByte("ExtendedFlags2");
}
// calculate UADPNetworkMessageType
if ((ExtendedFlags2 & ExtendedFlags2EncodingMask.NetworkMessageWithDiscoveryRequest) != 0)
{
m_uadpNetworkMessageType = UADPNetworkMessageType.DiscoveryRequest;
}
else if ((ExtendedFlags2 & ExtendedFlags2EncodingMask.NetworkMessageWithDiscoveryResponse) != 0)
{
m_uadpNetworkMessageType = UADPNetworkMessageType.DiscoveryResponse;
}
else
{
m_uadpNetworkMessageType = UADPNetworkMessageType.DataSetMessage;
}
// Decode PublisherId
if ((UADPFlags & UADPFlagsEncodingMask.PublisherId) != 0)
{
PublisherIdTypeEncodingMask publishedIdTypeType = (PublisherIdTypeEncodingMask)((byte)ExtendedFlags1 & kPublishedIdTypeUsedBits);
switch (publishedIdTypeType)
{
case PublisherIdTypeEncodingMask.UInt16:
m_publisherId = decoder.ReadUInt16("PublisherId");
break;
case PublisherIdTypeEncodingMask.UInt32:
m_publisherId = decoder.ReadUInt32("PublisherId");
break;
case PublisherIdTypeEncodingMask.UInt64:
m_publisherId = decoder.ReadUInt64("PublisherId");
break;
case PublisherIdTypeEncodingMask.String:
m_publisherId = decoder.ReadString("PublisherId");
break;
case PublisherIdTypeEncodingMask.Byte:
default:
// 000 The PublisherId is of DataType Byte
// This is the default value if ExtendedFlags1 is omitted
m_publisherId = decoder.ReadByte("PublisherId");
break;
}
}
// Decode DataSetClassId
if ((ExtendedFlags1 & ExtendedFlags1EncodingMask.DataSetClassId) != 0)
{
DataSetClassId = decoder.ReadGuid("DataSetClassId");
}
}
/// <summary>
/// Decode a scalar type
/// </summary>
/// <param name="binaryDecoder"></param>
/// <param name="builtInType"></param>
/// <returns>The decoded object</returns>
private object DecodeRawScalar(BinaryDecoder binaryDecoder, byte builtInType)
{
switch ((BuiltInType)builtInType)
{
case BuiltInType.Boolean:
return(binaryDecoder.ReadBoolean(null));
case BuiltInType.SByte:
return(binaryDecoder.ReadSByte(null));
case BuiltInType.Byte:
return(binaryDecoder.ReadByte(null));
case BuiltInType.Int16:
return(binaryDecoder.ReadInt16(null));
case BuiltInType.UInt16:
return(binaryDecoder.ReadUInt16(null));
case BuiltInType.Int32:
return(binaryDecoder.ReadInt32(null));
case BuiltInType.UInt32:
return(binaryDecoder.ReadUInt32(null));
case BuiltInType.Int64:
return(binaryDecoder.ReadInt64(null));
case BuiltInType.UInt64:
return(binaryDecoder.ReadUInt64(null));
case BuiltInType.Float:
return(binaryDecoder.ReadFloat(null));
case BuiltInType.Double:
return(binaryDecoder.ReadDouble(null));
case BuiltInType.String:
return(binaryDecoder.ReadString(null));
case BuiltInType.DateTime:
return(binaryDecoder.ReadDateTime(null));
case BuiltInType.Guid:
return(binaryDecoder.ReadGuid(null));
case BuiltInType.ByteString:
return(binaryDecoder.ReadByteString(null));
case BuiltInType.XmlElement:
return(binaryDecoder.ReadXmlElement(null));
case BuiltInType.NodeId:
return(binaryDecoder.ReadNodeId(null));
case BuiltInType.ExpandedNodeId:
return(binaryDecoder.ReadExpandedNodeId(null));
case BuiltInType.StatusCode:
return(binaryDecoder.ReadStatusCode(null));
case BuiltInType.QualifiedName:
return(binaryDecoder.ReadQualifiedName(null));
case BuiltInType.LocalizedText:
return(binaryDecoder.ReadLocalizedText(null));
case BuiltInType.DataValue:
return(binaryDecoder.ReadDataValue(null));
case BuiltInType.Enumeration:
return(binaryDecoder.ReadInt32(null));
case BuiltInType.Variant:
return(binaryDecoder.ReadVariant(null));
case BuiltInType.ExtensionObject:
return(binaryDecoder.ReadExtensionObject(null));
default:
return(null);
}
}
