* Reference doc http://www.altera.com.cn/literature/hb/cyclone-v/cv_5400A.pdf
* Note this doc is not entirely accurate. Of particular interest to us is the
* "header" length field being in U32s and not bytes.
* Reference doc http://www.altera.com.cn/literature/hb/cyclone-v/cv_5400A.pdf
* Note this doc is not entirely accurate. Of particular interest to us is the
* "header" length field being in U32s and not bytes.