private void ReadPacketHeader()
{
ProtocolVersion = m_Reader.ReadByte();
NetworkMessageFlags = m_Reader.ReadByte();
PublisherId = m_Reader.ReadGuid();
SecurityTokenId = m_Reader.ReadUInt32();
NonceLength = m_Reader.ReadByte();
Nonce = new byte[NonceLength];
for (int i = 0; i < NonceLength; i++)
{
Nonce[i] = m_Reader.ReadByte();
}
m_MessageCount = m_Reader.ReadByte();
List <ushort> _ids = new List <ushort>();
for (int i = 0; i < MessageCount; i++)
{
_ids.Add(m_Reader.ReadUInt16());
}
m_DataSetWriterIds = new ReadOnlyCollection <ushort>(_ids);
}
/// <summary>
/// Reads an instance of <see cref="IVariant" /> from UA Binary encoded stream.
/// </summary>
/// <param name="decoder">The decoder <see cref="IBinaryDecoder" /> to be used to read form the stream.</param>
/// <returns>The <see cref="IVariant" /> decoded from the UA binary stream of bytes.</returns>
public IVariant ReadVariant(IBinaryDecoder decoder)
{
byte encodingByte = decoder.ReadByte(); //Read the EncodingMask
if (encodingByte == 0x0)
{
return(null);
}
Variant value = null;
BuiltInType builtInType = (BuiltInType)(encodingByte & (byte)VariantEncodingMask.TypeIdMask);
if ((encodingByte & (byte)VariantEncodingMask.IsArray) == 0)
{
value = ReadValue(decoder, builtInType);
}
else
{
Array array = DecodeArray(decoder, builtInType, ((encodingByte & (byte)VariantEncodingMask.ArrayDimensionsPresents) != 0));
value = new Variant(array, builtInType);
}
return(value);
}
//methods
private Variant ReadValue(IBinaryDecoder encoder, BuiltInType encodingByte)
{
switch (encodingByte)
{
case BuiltInType.Boolean:
return(new Variant(encoder.ReadBoolean(), encodingByte));
case BuiltInType.SByte:
return(new Variant(encoder.ReadSByte(), encodingByte));
case BuiltInType.Byte:
return(new Variant(encoder.ReadByte(), encodingByte));
case BuiltInType.Int16:
return(new Variant(encoder.ReadInt16(), encodingByte));
case BuiltInType.UInt16:
return(new Variant(encoder.ReadUInt16(), encodingByte));
case BuiltInType.Int32:
case BuiltInType.Enumeration:
return(new Variant(encoder.ReadInt32(), encodingByte));
case BuiltInType.UInt32:
return(new Variant(encoder.ReadUInt32(), encodingByte));
case BuiltInType.Int64:
return(new Variant(encoder.ReadInt64(), encodingByte));
case BuiltInType.UInt64:
return(new Variant(encoder.ReadUInt64(), encodingByte));
case BuiltInType.Float:
return(new Variant(encoder.ReadSingle(), encodingByte));
case BuiltInType.Double:
return(new Variant(encoder.ReadDouble(), encodingByte));
case BuiltInType.String:
return(new Variant(ReadString(encoder), encodingByte));
case BuiltInType.DateTime:
return(new Variant(ReadDateTime(encoder), encodingByte));
case BuiltInType.Guid:
return(new Variant(ReadGuid(encoder), encodingByte));
case BuiltInType.ByteString:
return(new Variant(ReadByteString(encoder), encodingByte));
case BuiltInType.XmlElement:
return(new Variant(ReadXmlElement(encoder), encodingByte));
case BuiltInType.NodeId:
return(new Variant(ReadNodeId(encoder), encodingByte));
case BuiltInType.ExpandedNodeId:
return(new Variant(ReadExpandedNodeId(encoder), encodingByte));
case BuiltInType.StatusCode:
return(new Variant(ReadStatusCode(encoder), encodingByte));
case BuiltInType.QualifiedName:
return(new Variant(ReadQualifiedName(encoder), encodingByte));
case BuiltInType.LocalizedText:
return(new Variant(ReadLocalizedText(encoder), encodingByte));
case BuiltInType.ExtensionObject:
return(new Variant(ReadExtensionObject(encoder), encodingByte));
case BuiltInType.DataValue:
return(new Variant(ReadDataValue(encoder), encodingByte));
default:
throw new ArgumentOutOfRangeException($"Cannot decode unknown type in Variant object (0x{encodingByte:X}).");
}
}
