HIL_EXD_LEN
(*(header_ptr + HIL_EXD_LEN(header_ptr) - 1) & HIL_PKT_DATA_MASK))
(*(header_ptr + HIL_EXD_LEN(header_ptr) - 2 - \
((*(header_ptr + HIL_EXD_LEN(header_ptr) - 1 - \