IEEE80211_TKIP_HDRLEN
(IEEE80211_TKIP_HDRLEN + IEEE80211_TKIP_TAILLEN)
n0->m_pkthdr.len += IEEE80211_TKIP_HDRLEN;
noff = hdrlen + IEEE80211_TKIP_HDRLEN;
if (m->m_pkthdr.len < hdrlen + IEEE80211_TKIP_HDRLEN)
moff = hdrlen + IEEE80211_TKIP_HDRLEN;
memmove(mtod(m, caddr_t) + IEEE80211_TKIP_HDRLEN, wh, hdrlen);
m_adj(m, IEEE80211_TKIP_HDRLEN);