M_CSUM_DATA_IPv4_IPHL
M_CSUM_DATA_IPv4_IPHL(m->m_pkthdr.csum_data) +
fcb.txfcb_l4os = M_CSUM_DATA_IPv4_IPHL(m->m_pkthdr.csum_data);
M_CSUM_DATA_IPv4_IPHL(m->m_pkthdr.csum_data);
l3hlen = M_CSUM_DATA_IPv4_IPHL(m->m_pkthdr.csum_data);
start += M_CSUM_DATA_IPv4_IPHL(m0->m_pkthdr.csum_data);
start += M_CSUM_DATA_IPv4_IPHL(m->m_pkthdr.csum_data);
iphl = M_CSUM_DATA_IPv4_IPHL(m->m_pkthdr.csum_data);
iphl = M_CSUM_DATA_IPv4_IPHL(m0->m_pkthdr.csum_data);
iphl = M_CSUM_DATA_IPv4_IPHL(m0->m_pkthdr.csum_data);
len = M_CSUM_DATA_IPv4_IPHL(m->m_pkthdr.csum_data);
len = M_CSUM_DATA_IPv4_IPHL(m->m_pkthdr.csum_data);
M_CSUM_DATA_IPv4_IPHL(m->m_pkthdr.csum_data) :
iphl = M_CSUM_DATA_IPv4_IPHL(m->m_pkthdr.csum_data);
iphl = M_CSUM_DATA_IPv4_IPHL(m0->m_pkthdr.csum_data);
iphl = M_CSUM_DATA_IPv4_IPHL(m0->m_pkthdr.csum_data);
iphlen = M_CSUM_DATA_IPv4_IPHL(mp->m_pkthdr.csum_data);
l4off = l3off + M_CSUM_DATA_IPv4_IPHL(data);
const size_t iphdrlen = M_CSUM_DATA_IPv4_IPHL(mh->m_pkthdr.csum_data);
KASSERT(M_CSUM_DATA_IPv4_IPHL(m->m_pkthdr.csum_data) >=