public static EnhancedPacketBlock 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.EnhancedPacket, "Invalid packet type");
long positionInStream = baseBlock.PositionInStream;
using (Stream stream = new MemoryStream(baseBlock.Body))
{
using (BinaryReader binaryReader = new BinaryReader(stream))
{
int interfaceID = binaryReader.ReadInt32().ReverseByteOrder(baseBlock.ReverseByteOrder);
byte[] timestamp = binaryReader.ReadBytes(8);
var timestampHelper = new TimestampHelper(timestamp, baseBlock.ReverseByteOrder);
int capturedLength = binaryReader.ReadInt32().ReverseByteOrder(baseBlock.ReverseByteOrder);
int packetLength = binaryReader.ReadInt32().ReverseByteOrder(baseBlock.ReverseByteOrder);
byte[] data = binaryReader.ReadBytes(capturedLength);
if (data.Length < capturedLength)
{
throw new EndOfStreamException("Unable to read beyond the end of the stream");
}
int remainderLength = (int)capturedLength % BaseBlock.AlignmentBoundary;
if (remainderLength > 0)
{
int paddingLength = BaseBlock.AlignmentBoundary - remainderLength;
binaryReader.ReadBytes(paddingLength);
}
var option = EnhancedPacketOption.Parse(binaryReader, baseBlock.ReverseByteOrder, ActionOnException);
var enhancedBlock = new EnhancedPacketBlock(interfaceID, timestampHelper, packetLength, data, option, positionInStream);
return(enhancedBlock);
}
}
}
public static EnhancedPacketBlock CreateEnhancedPacketFromIPacket(IPacket packet, Action <Exception> ActionOnException)
{
CustomContract.Requires <ArgumentNullException>(packet != null, "packet cannot be null");
CustomContract.Requires <ArgumentNullException>(packet.Data != null, "packet.Data cannot be null");
var timestampHelper = new TimestampHelper(packet.Seconds, packet.Microseconds);
var enhancedBlock = new EnhancedPacketBlock(0, timestampHelper, packet.Data.Length, packet.Data, new EnhancedPacketOption(), 0);
return(enhancedBlock);
}
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);
}
}
public static void AbstractBlockFactory_ConvertTo_EnhancedPacketBlock_Test()
{
byte[] byteblock = { 6, 0, 0, 0, 132, 0, 0, 0, 0, 0, 0, 0, 12, 191, 4, 0, 118, 176, 176, 8, 98, 0, 0, 0, 98, 0, 0, 0, 0, 0, 94, 0, 1, 177, 0, 33, 40, 5, 41, 186, 8, 0, 69, 0, 0, 84, 48, 167, 0, 0, 255, 1, 3, 72, 192, 168, 177, 160, 10, 64, 11, 49, 8, 0, 10, 251, 67, 168, 0, 0, 79, 161, 27, 41, 0, 2, 83, 141, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 0, 0, 132, 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);
EnhancedPacketBlock packetBlock = block as EnhancedPacketBlock;
Assert.IsNotNull(packetBlock);
Assert.AreEqual(packetBlock.InterfaceID, 0);
Assert.AreEqual(packetBlock.Seconds, 1335958313);
Assert.AreEqual(packetBlock.Microseconds, 152630);
Assert.IsTrue(true);
}
}
}