M_CSUM_DATA_IPv4_OFFSET
M_CSUM_DATA_IPv4_OFFSET(m->m_pkthdr.csum_data);
M_CSUM_DATA_IPv4_OFFSET(m->m_pkthdr.csum_data));
offset = M_CSUM_DATA_IPv4_OFFSET(m0->m_pkthdr.csum_data) + start;
offset = M_CSUM_DATA_IPv4_OFFSET(m->m_pkthdr.csum_data)
M_CSUM_DATA_IPv4_OFFSET(m_head->m_pkthdr.csum_data) + 16) {
DGE_TCPIP_TUCSO(offset + M_CSUM_DATA_IPv4_OFFSET(m0->m_pkthdr.csum_data)) |
M_CSUM_DATA_IPv4_OFFSET(m0->m_pkthdr.csum_data)) |
l4offset += M_CSUM_DATA_IPv4_OFFSET(m->m_pkthdr.csum_data);
offset += M_CSUM_DATA_IPv4_OFFSET(m->m_pkthdr.csum_data);