public static InterfaceDescriptionBlock Parse(BaseBlock baseBlock, Action <Exception> ActionOnException)
{
Contract.Requires <ArgumentNullException>(baseBlock != null, "BaseBlock cannot be null");
Contract.Requires <ArgumentNullException>(baseBlock.Body != null, "BaseBlock.Body cannot be null");
Contract.Requires <ArgumentException>(baseBlock.BlockType == BaseBlock.Types.InterfaceDescription, "Invalid packet type");
long positionInStream = baseBlock.PositionInStream;
using (Stream stream = new MemoryStream(baseBlock.Body))
{
using (BinaryReader binaryReader = new BinaryReader(stream))
{
UInt16 linktype = binaryReader.ReadUInt16().ReverseByteOrder(baseBlock.ReverseByteOrder);
if (!Enum.IsDefined(typeof(LinkTypes), linktype))
{
throw new ArgumentException(string.Format("[InterfaceDescriptionBlock.ctor] invalid LinkTypes: {0}, block begin on position {1} ", linktype, positionInStream));
}
LinkTypes linkType = (LinkTypes)linktype;
binaryReader.ReadUInt16(); // Reserved field.
int snapLength = binaryReader.ReadInt32().ReverseByteOrder(baseBlock.ReverseByteOrder);
InterfaceDescriptionOption Options = InterfaceDescriptionOption.Parse(binaryReader, baseBlock.ReverseByteOrder, ActionOnException);
InterfaceDescriptionBlock interfaceBlock = new InterfaceDescriptionBlock(linkType, snapLength, Options, positionInStream);
return(interfaceBlock);
}
}
}
/// <summary>
/// The Interface Description Block is mandatory. This block is needed to specify the characteristics of the network interface
/// on which the capture has been made. In order to properly associate the captured data to the corresponding interface, the Interface
/// Description Block must be defined before any other block that uses it; therefore, this block is usually placed immediately after
/// the Section Header Block.
/// </summary>
public InterfaceDescriptionBlock(LinkTypes LinkType, int SnapLength, InterfaceDescriptionOption Options, long PositionInStream = 0)
{
Contract.Requires <ArgumentNullException>(Options != null, "Options cannot be null");
this.LinkType = LinkType;
this.SnapLength = SnapLength;
this.options = Options;
this.PositionInStream = PositionInStream;
}
public static InterfaceDescriptionBlock GetEmptyInterfaceDescription(bool reverseBytesOrder)
{
InterfaceDescriptionOption Options = new InterfaceDescriptionOption();
return(new InterfaceDescriptionBlock(LinkTypes.Ethernet, 65535, Options));
}
