M_ACKCMP
if (m != NULL && (m->m_flags & M_ACKCMP) != 0) {
m = m_getcl(M_NOWAIT, MT_DATA, M_ACKCMP | M_PKTHDR);
m->m_flags |= M_ACKCMP;
m->m_flags &= ~M_ACKCMP;
if (m->m_flags & M_ACKCMP) {
if (m->m_flags & M_ACKCMP) {
if ((m->m_flags & M_ACKCMP) == 0) {
if ((m->m_flags & M_ACKCMP) == 0)
if (m->m_flags & M_ACKCMP) {