M_NOFREE
m->m_flags = m->m_flags & (M_EXT | M_RDONLY | M_NOFREE | flags);
if (memoryBuffer->m_flags & M_NOFREE) {
if ((memoryBuffer->m_flags & (M_PKTHDR|M_NOFREE)) == (M_PKTHDR|M_NOFREE))
else if ((memoryBuffer->m_flags & M_NOFREE) == 0)