FF_LLC_SIZE
if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
if (m->m_pkthdr.len < 3*FF_LLC_SIZE)
if (m->m_len < FF_LLC_SIZE &&
(m = m_pullup(m, FF_LLC_SIZE)) == NULL) {
m_adj(m, FF_LLC_SIZE);