m_dup_pkthdr
if (!m_dup_pkthdr(n, m, wait))
if (!m_dup_pkthdr(n, m, how))
if (!m_dup_pkthdr(n, m, how))
if (m_dup_pkthdr(m_final, m0, how) == 0)
if (off == 0 && (m->m_flags & M_PKTHDR) && !m_dup_pkthdr(n, m, wait)) {
if (!m_dup_pkthdr(mtemp, m, M_NOWAIT)) {
if (!m_dup_pkthdr(n, m, M_NOWAIT)) {
int m_dup_pkthdr(struct mbuf *, const struct mbuf *, int);