- WARNING: Field API changed. parameter shift must be now provided to the   length-varying field and not to the length field. - added Field.i2len() method to return the length of a field (the number of   bytes in the raw packet string)
- WARNING: Field API changed. parameter shift must be now provided to the
  length-varying field and not to the length field.
- added Field.i2len() method to return the length of a field (the number of
  bytes in the raw packet string)

mytliulei/Scapy,mytliulei/Scapy