public static SimplePacketBlock Parse(BaseBlock baseBlock, Action <Exception> ActionOnException)
{
CustomContract.Requires <ArgumentNullException>(baseBlock != null, "BaseBlock cannot be null");
CustomContract.Requires <ArgumentNullException>(baseBlock.Body != null, "BaseBlock.Body cannot be null");
CustomContract.Requires <ArgumentException>(baseBlock.BlockType == BaseBlock.Types.SimplePacket, "Invalid packet type");
long positionInStream = baseBlock.PositionInStream;
using (Stream stream = new MemoryStream(baseBlock.Body))
{
using (BinaryReader binaryReader = new BinaryReader(stream))
{
int packetLength = binaryReader.ReadInt32().ReverseByteOrder(baseBlock.ReverseByteOrder);
byte[] data = binaryReader.ReadBytes(packetLength);
if (data.Length < packetLength)
{
throw new EndOfStreamException("Unable to read beyond the end of the stream");
}
int remainderLength = packetLength % BaseBlock.AlignmentBoundary;
if (remainderLength > 0)
{
int paddingLength = BaseBlock.AlignmentBoundary - remainderLength;
binaryReader.ReadBytes(paddingLength);
}
SimplePacketBlock simplePacketBlock = new SimplePacketBlock(data, positionInStream);
return(simplePacketBlock);
}
}
}
public static void AbstractBlockFactory_ConvertTo_SimplePacketBlock_Test()
{
byte[] byteblock = { 3, 0, 0, 0, 139, 0, 0, 0, 123, 0, 0, 0, 104, 83, 17, 243, 59, 0, 0, 0, 151, 143, 0, 243, 59, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 208, 241, 255, 191, 127, 0, 0, 0, 208, 79, 17, 243, 59, 0, 0, 0, 96, 5, 0, 243, 59, 0, 0, 0, 252, 6, 0, 243, 59, 0, 0, 0, 96, 2, 0, 243, 59, 0, 0, 0, 88, 6, 64, 0, 0, 0, 0, 0, 104, 83, 17, 243, 59, 0, 0, 0, 104, 83, 17, 243, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 139, 0, 0, 0 };
using (MemoryStream stream = new MemoryStream(byteblock))
{
using (BinaryReader binaryReader = new BinaryReader(stream))
{
AbstractBlock block = AbstractBlockFactory.ReadNextBlock(binaryReader, false, null);
Assert.IsNotNull(block);
SimplePacketBlock packetBlock = block as SimplePacketBlock;
Assert.IsNotNull(packetBlock);
Assert.AreEqual(packetBlock.PacketLength, 123);
}
}
}
public static AbstractBlock ReadNextBlock(BinaryReader binaryReader, bool bytesReorder, Action <Exception> ActionOnException)
{
CustomContract.Requires <ArgumentNullException>(binaryReader != null, "binaryReader cannot be null");
try
{
BaseBlock baseblock = new BaseBlock(binaryReader, bytesReorder);
AbstractBlock block = null;;
switch (baseblock.BlockType)
{
case BaseBlock.Types.SectionHeader:
block = SectionHeaderBlock.Parse(baseblock, ActionOnException);
break;
case BaseBlock.Types.InterfaceDescription:
block = InterfaceDescriptionBlock.Parse(baseblock, ActionOnException);
break;
case BaseBlock.Types.Packet:
block = PacketBlock.Parse(baseblock, ActionOnException);
break;
case BaseBlock.Types.SimplePacket:
block = SimplePacketBlock.Parse(baseblock, ActionOnException);
break;
case BaseBlock.Types.NameResolution:
block = NameResolutionBlock.Parse(baseblock, ActionOnException);
break;
case BaseBlock.Types.InterfaceStatistics:
block = InterfaceStatisticsBlock.Parse(baseblock, ActionOnException);
break;
case BaseBlock.Types.EnhancedPacket:
block = EnhancedPacketBlock.Parse(baseblock, ActionOnException);
break;
default:
break;
}
return(block);
}
catch (Exception exc)
{
ActionOnException(exc);
return(null);
}
}