M_CSUM_DATA_IPv6_IPHL
fcb.txfcb_l4os = M_CSUM_DATA_IPv6_IPHL(m->m_pkthdr.csum_data);
l3hlen = M_CSUM_DATA_IPv6_IPHL(m->m_pkthdr.csum_data);
iphl = M_CSUM_DATA_IPv6_IPHL(m->m_pkthdr.csum_data);
len = M_CSUM_DATA_IPv6_IPHL(m->m_pkthdr.csum_data);
len = M_CSUM_DATA_IPv6_IPHL(m->m_pkthdr.csum_data);
M_CSUM_DATA_IPv6_IPHL(m->m_pkthdr.csum_data);
iphl = M_CSUM_DATA_IPv6_IPHL(m->m_pkthdr.csum_data);
iphl = M_CSUM_DATA_IPv6_IPHL(m0->m_pkthdr.csum_data);
iphl = M_CSUM_DATA_IPv6_IPHL(m0->m_pkthdr.csum_data);
iphlen = M_CSUM_DATA_IPv6_IPHL(mp->m_pkthdr.csum_data);
l4off = l3off + M_CSUM_DATA_IPv6_IPHL(data);
l4hdroff = M_CSUM_DATA_IPv6_IPHL(m->m_pkthdr.csum_data);
offset = M_CSUM_DATA_IPv6_IPHL(m->m_pkthdr.csum_data);