internal RadioPacket(ByteArraySegment bas)
{
log.Debug("");
// slice off the header portion
header = new ByteArraySegment(bas);
header.Length = RadioFields.DefaultHeaderLength;
Version = VersionBytes;
Length = LengthBytes;
// update the header size based on the headers packet length
header.Length = Length;
Present = ReadPresentFields();
RadioTapFields = ReadRadioTapFields();
//Before we attempt to parse the payload we need to work out if
//the FCS was valid and if it will be present at the end of the frame
FlagsRadioTapField flagsField = this[RadioTapType.Flags] as FlagsRadioTapField;
payloadPacketOrData = ParseEncapsulatedBytes(header.EncapsulatedBytes(), flagsField);
}
internal static PacketOrByteArraySegment ParseEncapsulatedBytes(ByteArraySegment payload, FlagsRadioTapField flagsField)
{
var payloadPacketOrData = new PacketOrByteArraySegment();
MacFrame frame = null;
if (flagsField != null)
{
bool fcsPresent = ((flagsField.Flags & RadioTapFlags.FcsIncludedInFrame) == RadioTapFlags.FcsIncludedInFrame);
if (fcsPresent)
{
frame = MacFrame.ParsePacketWithFcs(payload);
}
else
{
frame = MacFrame.ParsePacket(payload);
}
}
else
{
frame = MacFrame.ParsePacket(payload);
}
if (frame == null)
{
payloadPacketOrData.TheByteArraySegment = payload;
}
else
{
payloadPacketOrData.ThePacket = frame;
}
return(payloadPacketOrData);
}
