* and it is udp packet, which has a dest port as the IANA assigned.
* the hardware is expected to do the checksum offload, but the
* hardware will not do the checksum offload when udp dest port is
* and it is udp packet, which has a dest port as the IANA assigned.
* the hardware is expected to do the checksum offload, but the
* hardware will not do the checksum offload when udp dest port is