if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
th->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
th->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)